ASTM D8335-20

Standard Guide for Identification of Fiber-Reinforced Polymer-Matrix Composite Materials

SIGNIFICANCE AND USE
4.1 This guide provides the recommended data elements for the identification of fiber-reinforced composite materials and the information which is considered essential to uniquely describe a fiber, filler, or core material.  
4.2 The intent of this guide is to provide sufficient detail that values are known for the material parameters that may influence test results or material property values.  
4.3 This guide is for material identification and description only. It does not include the recommended data elements for mechanical test data or other specific types of test data. Such items are covered by separate formats to be referenced in material specifications or other test standards.  
4.4 Composite materials are defined as two or more materials that are combined on a macroscale. There is a gray area between composites and other material classes. Two examples of this gray area between polymer matrix composites and plastics are toughened polystyrene and liquid crystal polymer. Appendix X1 contains a table, which provides guidelines for distinguishing between reinforced polymers and polymer matrix composites.  
4.5 Composite materials consist of a matrix phase and one or more discrete reinforcements. Reinforcements may be interpreted broadly to include any macroscale second material, including fibers, particulates, precipitated particles, or structured domains of the parent material. The reinforcements covered in this guide include fibers and such particulates and precipitated particles that can be described adequately as filler within the matrix. The reinforcements may be polymers, metals, ceramics, or other materials. Sandwich constructions are covered by this guide via identification of the core material. These guidelines are suitable for the identification of composites in simple shapes of constant thickness; for example, plates or tubes. For complex structures, additional information relevant to a specific application may be required.  
4.6 Classification of ...
SCOPE
1.1 This guide establishes essential and desirable identification elements for fiber-reinforced composite materials and for fibers, fillers, and core materials, matrices, preforms, prepregs, processes, and parts used in these composite materials. This guide is intended for preparing test reports, databases, and material documents.  
1.2 These guidelines are specific to fiber-reinforced polymer-matrix composite materials. Composite materials, which also contain particulates or precipitated particles, are also included, provided they can be described adequately as a filler in the matrix.  
1.3 The materials covered by this guide include fibers, both continuous and discontinuous, and fillers of various geometries which are used as reinforcements in composite materials, as well as core materials used in sandwich composites, matrices both thermoset and thermoplastic, fiber preforms, prepreg product forms, manufacturing processes, and generic part forms. Cores may be foam, honeycomb, or naturally occurring materials such as balsa wood. These materials are distinguished from bulk materials by the importance of their specialized geometric forms to their properties. This difference is reflected in the use of geometry, along with chemistry, as a primary basis for classification. Additional data elements that are considered desirable, but not essential, are also defined. The purpose is to allow the meaningful comparison of data from different sources.  
1.4 Data elements in this guide are relevant to test data, data as obtained in the test laboratory and historically recorded in laboratory notebooks. Property data, data that have been analyzed and reviewed, may only need a subset of these data elements.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practi...

General Information

• Status: Published
• Publication Date: 30-Jun-2020
• ICS: 83.120 - Reinforced plastics
• Technical Committee: D30 - Composite Materials
• Drafting Committee: D30.01 - Editorial and Resource Standards

Relations

• Refers: ASTM D6507-19 - Standard Practice for Fiber Reinforcement Orientation Codes for Composite Materials
• Effective Date: 15-Oct-2019
• Refers: ASTM D3878-19a - Standard Terminology for Composite Materials
• Effective Date: 15-Oct-2019
• Refers: ASTM D3878-19 - Standard Terminology for Composite Materials
• Effective Date: 15-Apr-2019
• Refers: ASTM D3878-18 - Standard Terminology for Composite Materials
• Effective Date: 01-Apr-2018
• Refers: ASTM D1600-18 - Standard Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
• Effective Date: 01-Jan-2018
• Refers: ASTM D3878-16 - Standard Terminology for Composite Materials
• Effective Date: 01-Aug-2016
• Refers: ASTM D6507-16 - Standard Practice for Fiber Reinforcement Orientation Codes for Composite Materials
• Effective Date: 01-Jul-2016
• Refers: ASTM D3878-15 - Standard Terminology for Composite Materials
• Effective Date: 01-Jul-2015
• Refers: ASTM D1600-14 - Standard Terminology for Abbreviated Terms Relating to Plastics
• Effective Date: 01-Feb-2014
• Refers: ASTM D3878-07(2013) - Standard Terminology for Composite Materials
• Effective Date: 01-May-2013
• Refers: ASTM D1600-13 - Standard Terminology for Abbreviated Terms Relating to Plastics
• Effective Date: 15-Apr-2013
• Refers: ASTM D6507-11 - Standard Practice for Fiber Reinforcement Orientation Codes for Composite Materials
• Effective Date: 01-Mar-2011
• Refers: ASTM D1600-08 - Standard Terminology for Abbreviated Terms Relating to Plastics
• Effective Date: 01-Mar-2008
• Refers: ASTM D3878-07 - Standard Terminology for Composite Materials
• Effective Date: 01-May-2007
• Refers: ASTM D1600-07 - Standard Terminology for Abbreviated Terms Relating to Plastics
• Effective Date: 01-May-2007

Overview

ASTM D8335-20 is the Standard Guide for Identification of Fiber-Reinforced Polymer-Matrix Composite Materials, developed by ASTM International. This guide establishes essential and desirable identification elements for fiber-reinforced composite materials, their constituents (fibers, fillers, and core materials), matrices, preforms, prepregs, manufacturing processes, and generic part forms. The standard's primary goal is to provide a comprehensive framework for uniquely identifying composite materials, ensuring consistency and traceability in test reports, databases, and material documentation.

Fiber-reinforced polymer-matrix composites, often used in advanced engineering applications, are complex materials consisting of a polymer matrix reinforced by fibers, fillers, and sometimes core materials. Due to the diversity of constituent materials and the importance of their geometric and chemical attributes, clear identification is essential for meaningful data comparisons and reliable material performance assessments.

Key Topics

• Essential Data Elements: ASTMD8335-20 defines essential and recommended data elements needed to accurately describe fiber-reinforced polymer composites. These include information about material type, class, chemical composition, geometric form, and specific properties of fibers, fillers, matrices, and cores.
• Material Constituents Covered:
  • Fibers (continuous, discontinuous)
  • Fillers (particulate, platelet, hollow sphere/cylinder)
  • Core materials (foam, honeycomb, balsa wood)
  • Polymer matrices (thermoset, thermoplastic)
  • Preforms and prepregs
• Material Forms: The guide covers a wide range of forms such as two-dimensional and three-dimensional fabrics, woven or nonwoven preforms, and various sandwich constructions.
• Classification Basis: Materials are classified based on both chemical and geometric characteristics, reflecting properties unique to composite forms rather than bulk materials.
• Traceability and Batch Control: The guide includes data elements crucial for maintaining lot and batch control, traceability of constituent materials, and specifics about manufacturing processes.

Applications

The ASTM D8335-20 standard is widely applicable in industries that utilize fiber-reinforced polymer-matrix composites, including aerospace, automotive, construction, marine, and sports equipment manufacturing. Its structured approach to material identification enables:

• Consistent Material Documentation: Creating reliable and uniform reports for composite materials, supporting design, quality assurance, and regulatory compliance.
• Database Development: Populating composite material databases with standardized data fields, facilitating meaningful comparisons across studies or suppliers.
• Test Report Preparation: Supplying required material identification details in laboratory and certification reports to ensure credible property data and research outcomes.
• Traceability: Enhancing batch and lot control, which is essential for process verification, product recalls, or audits.
• Material Specification Integration: Supporting reference to standardized material description blocks in specifications and test methods.

Related Standards

ASTM D8335-20 references and complements various other standards that define terminology or test/reporting methods for composite materials, including:

• ASTM D1600: Terminology for abbreviated terms relating to plastics
• ASTM D3878: Terminology for composite materials
• ASTM D6507: Practice for fiber reinforcement orientation codes for composite materials
• IEEE/ASTM SI 10: Metric practice standard
• CMH-17 Composite Materials Handbook

These related standards provide foundational definitions, classification schemes, and standard practices that are integrated into the ASTM D8335-20 identification framework.

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Keywords: fiber-reinforced polymer-matrix composites, composite material identification, ASTM D8335, essential data elements, material traceability, composite documentation, database development, process control, batch identification, material specification.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D8335 −20
Standard Guide for
Identification of Fiber-Reinforced Polymer-Matrix Composite
Materials
This standard is issued under the fixed designation D8335; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 This guide establishes essential and desirable identifica-
1.6 This international standard was developed in accor-
tion elements for fiber-reinforced composite materials and for
dance with internationally recognized principles on standard-
fibers, fillers, and core materials, matrices, preforms, prepregs,
ization established in the Decision on Principles for the
processes, and parts used in these composite materials. This
Development of International Standards, Guides and Recom-
guide is intended for preparing test reports, databases, and
mendations issued by the World Trade Organization Technical
material documents.
Barriers to Trade (TBT) Committee.
1.2 These guidelines are specific to fiber-reinforced
polymer-matrix composite materials. Composite materials,
2. Referenced Documents
which also contain particulates or precipitated particles, are
2.1 ASTM Standards:
also included, provided they can be described adequately as a
D1600 Terminology forAbbreviatedTerms Relating to Plas-
filler in the matrix.
tics
1.3 The materials covered by this guide include fibers, both
D3878 Terminology for Composite Materials
continuous and discontinuous, and fillers of various geometries
D6507 Practice for Fiber Reinforcement Orientation Codes
which are used as reinforcements in composite materials, as
for Composite Materials
well as core materials used in sandwich composites, matrices
IEEE/ASTM SI 10 American National Standard for Metric
both thermoset and thermoplastic, fiber preforms, prepreg
Practice
product forms, manufacturing processes, and generic part
2.2 Other Document:
forms. Cores may be foam, honeycomb, or naturally occurring
CMH-17 Composite Materials Handbook-17, Revision G or
materials such as balsa wood. These materials are distin-
latest
guished from bulk materials by the importance of their
specialized geometric forms to their properties. This difference
3. Terminology
is reflected in the use of geometry, along with chemistry, as a
3.1 Definitions—Terminology in accordance with Terminol-
primary basis for classification. Additional data elements that
ogy D3878 shall be used where applicable.
areconsidereddesirable,butnotessential,arealsodefined.The
3.2 Definitions of Terms Specific to This Standard:
purpose is to allow the meaningful comparison of data from
3.2.1 data element, n—one individual piece of information
different sources.
used in describing a material or to record test results.
1.4 Data elements in this guide are relevant to test data, data
3.2.1.1 Discussion—For example, a variable name, test
as obtained in the test laboratory and historically recorded in
parameter, and so forth.
laboratory notebooks. Property data, data that have been
3.2.2 essential data element, n—a data element in a record
analyzed and reviewed, may only need a subset of these data
which must be completed in order to make the record mean-
elements.
ingful in accordance with the pertinent guidelines or standard.
1.5 This standard does not purport to address all of the
3.2.2.1 Discussion—Data elements are considered essential
safety concerns, if any, associated with its use. It is the
iftheyarerequiredtomakeacomparisonofpropertydatafrom
responsibility of the user of this standard to establish appro-
different sources meaningful. A comparison of data from
1 2
This guide is under the jurisdiction of ASTM Committee D30 on Composite For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Materials and is the direct responsibility of Subcommittee D30.01 on Editorial and contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Resource Standards. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved July 1, 2020. Published August 2020. DOI: 10.1520/ the ASTM website.
D8335-20. Available from www.cmh17.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D8335−20
different sources may still be possible if essential information essential information is omitted, but the usefulness of the
is omitted, but the value of the comparison may be greatly comparison may be greatly reduced.
reduced.
4.9 For identification of composite materials, Table 1 (Part
A) and Tables 2 and 3 shall be used.
4. Significance and Use
4.10 For identification of fiber, filler, and core, Table 1 (Part
4.1 This guide provides the recommended data elements for
B), Tables 4-10, and Tables 11-14 shall be used.
the identification of fiber-reinforced composite materials and
4.11 Foridentificationofmatrix,Table1(PartC)andTables
the information which is considered essential to uniquely
15-17 shall be used.
describe a fiber, filler, or core material.
4.12 For identification of preform, Table 1 (Part D) and
4.2 Theintentofthisguideistoprovidesufficientdetailthat
Tables 18-20 shall be used.
values are known for the material parameters that may influ-
ence test results or material property values. 4.13 For identification of prepreg, Table 1 (Part E), Table 5,
and Tables 21 and 22 shall be used.
4.3 This guide is for material identification and description
only. It does not include the recommended data elements for 4.14 Foridentificationofprocess,Table1(PartF),Table16,
mechanical test data or other specific types of test data. Such and Tables 23-26 shall be used.
items are covered by separate formats to be referenced in
4.15 For identification of composite parts, Table 1 (Part G)
material specifications or other test standards.
and Table 27 shall be used.
4.4 Composite materials are defined as two or more
5. Reporting
materials that are combined on a macroscale. There is a gray
area between composites and other material classes. Two
5.1 This guide is intended to provide common elements for
examples of this gray area between polymer matrix composites
material identification when used for reporting testing and
and plastics are toughened polystyrene and liquid crystal
material properties based on accumulated results from a
polymer. Appendix X1 contains a table, which provides
number of tests. The data reporting section of standard test
guidelines for distinguishing between reinforced polymers and
methods may reference this guide for material identification. In
polymer matrix composites.
addition, such a data reporting section may identify any usage
specific to that document.These requirements do not mean that
4.5 Composite materials consist of a matrix phase and one
the information must be reported separately for each specimen
or more discrete reinforcements. Reinforcements may be
or that all information must be reported separately for each
interpreted broadly to include any macroscale second material,
batch. Any data elements that are the same for a series of
including fibers, particulates, precipitated particles, or struc-
specimens or for a series of batches may be reported once for
tured domains of the parent material. The reinforcements
theentireseries,aslongasitisclearlyindicatedthattheyapply
covered in this guide include fibers and such particulates and
to all specimens or all batches.
precipitated particles that can be described adequately as filler
within the matrix. The reinforcements may be polymers,
6. Traceability and Batch/Lot Control
metals, ceramics, or other materials. Sandwich constructions
6.1 The types of information needed to establish composite
are covered by this guide via identification of the core material.
materials traceability and batch/lot control thereof have been
These guidelines are suitable for the identification of compos-
determined (Tables 1-27). Other information that may be
ites in simple shapes of constant thickness; for example, plates
required per contractual agreement between the end user and
or tubes. For complex structures, additional information rel-
supplier towards establishing full traceability are:
evant to a specific application may be required.
6.1.1 The names of the manufacturers of the composite
4.6 Classification of composite materials is complicated by
material and its starting constituents.
the fact that composites are formed by combining different
6.1.2 Any applicable standards (for example, Specifications
materials in varying amounts and configurations; this results in
and Test Methods). The latest revision shall be assumed unless
an infinite number of possibilities. An effective identification
the preferred revision number or letter is explicitly stated.
scheme must be capable of possible combinations without
6.1.3 Manufacturer’s Identification—Code, part number, lot
overburdening the system with details relevant only to a
number, or other identification used by the manufacturer(s) to
limited number of material systems. This guide provides both
identify the composite material and any of its starting constitu-
essential data elements and data elements that are considered
ents.
desirable but not essential. Data elements are considered
6.1.4 Date of impregnation or mixing (uncured prepreg).
essential if they are required to make a meaningful comparison
6.1.5 Processing equipment (type, model number).
of property data from different sources.
6.1.6 Processing procedure (time, temperature, and pressure
4.7 Identification of constituent materials of the composites
profile).
is included to the level considered necessary for identification
of the composite. 7. Composite Material Identification
4.8 Comparison of property data from different databases 7.1 A listing of the types of qualitative information needed
will be most meaningful if all the essential information defined to establish composite material traceability, and numerical data
by the guide is present. Comparison may still be possible if needed verify conformance to a material specification, is given
D8335−20
TABLE 1 Data Elements for Identification of Composite Materials
Data Element Descriptive Name Category Set, Category, or Units Level
A. Composite Material Identification
Material identifier Essential
Data source identification Essential
Composite material name Essential
Material class “Composite” Essential
Material subclass Essential
Material form Essential
Matrix class “Polymer” Essential
Reinforcement class Table 2 Essential
Reinforcement subclass Table 3 Essential
Material specification [Specification] Recommended
Material source (if not from manufacturer) [Organization] Recommended
Material maximum temperature, nominal C(F) Optional
Material minimum temperature, nominal C(F) Optional
Material SDS and assigning organization Optional
Contract number Optional
Data restrictions Optional
B. Fiber Information
Fiber class Table 4 Recommended
Fiber chemical class Table 5 Essential
Fiber chemical family Table 6 Recommended
Fiber modulus subfamily Table 7 Optional
Fiber commercial name Essential
Fiber additional name information Recommended
Fiber manufacturer’s specification [Specification] Recommended
Fiber user’s specification [Specification] Optional
Fiber manufacturer’s internal designation Optional
Fiber manufacturer [Organization] Recommended
Fiber lot Essential
Fiber date of manufacture Recommended
Fiber batch certification number Optional
Fiber density g/cm Essential
Fiber density test method [Test method] Essential
Tow or yarn filament count Essential
Tow or yarn filament count test method [Test method] Recommended
Tow/strand linear density tex Optional
Tow/strand linear density test method [Test method] Optional
Tow yield m/g Optional
Fiber filament diameter mm Essential
Fiber filament diameter test method [Test method] Recommended
Filament cross-section type Table 8 Recommended
Surface treatment type Table 9 Recommended
Surface treatment detail Recommended
Tow or yarn sizing identification Recommended
Tow or yarn sizing amount Recommended
Tow or yarn twist amount t/m Recommended
Tow or yarn twist direction Table 10 Recommended
C. Matrix Information
Matrix subclass Table 15 Essential
Matrix chemical family Table 16 Essential
Matrix subfamily Table 17 Optional
Matrix commercial name Essential
Matrix manufacturer [Organization] Essential
Matrix lot number Recommended
Matrix date of manufacture Recommended
Matrix filler type Recommended
Matrix filler amount Recommended
Matrix nominal density g/cm Recommended
Matrix nominal density test method [Test method] Recommended
Matrix internal designation Optional
Matrix manufacturer specification [Specification] Optional
Gel time Optional
D. Preform Information
Preform architecture Table 18 Essential
Preform identifier Essential
Preform manufacturer [Organization] Essential
Preform method of manufacture Table 19
Number of preform layers Essential
2-D Fabric Information
Fabric manufacturer [Organization] Essential
Fabric weave type Table 20 Essential
Fabric style number Essential
Fabric lot Essential
Fabric date of manufacture Recommended
Fabric batch certification number Optional
D8335−20
Fabric manufacturer specification [Specification] Optional
Fabric user specification [Specification] Optional
Fabric sizing identification Essential
Fabric sizing content Essential
Fabric end count (warp) /m Essential
Fabric fill fiber (if different) Essential
Fabric pick count (fill) /m Essential
Fabric nominal fiber areal weight g/mm Optional
Tracer warp name Optional
Tracer warp linear density g/m Optional
Tracer warp spacing /mm Optional
Tracer warp sizing Optional
Tracer fill name Optional
Tracer fill linear density g/m Optional
Tracer fill spacing /mm Optional
Tracer fill sizing Optional
3-D Woven Materials
Interlock description Essential
Warp fiber filament count Essential
Weft fiber filament count Essential
Angle fiber filament count Essential
Weaver yarn filament count Essential
Percentage of warp yarn % Essential
Percentage of weft yarn % Essential
Angle of angle yarn (positive with respect to axial yarn) degrees Essential
Percentage of angle yarn % Essential
Percentage of weaver yarn % Essential
Percentage of through-thickness yarn % Essential
Pitch length in. Essential
Warp end count tow/in. Essential
Weft end count tow/in. Essential
Unit cell width in. Optional
Unit cell length in. Optional
Unit cell depth in. Optional
Stitching Information
Stitch type Essential
Stitch thread Essential
Stitch axial pitch degrees Essential
Stitch row spacing in. Essential
Stitch denier denier Recommended
Stitch filament count Essential
Bias yarn end count Essential
Bias yarn angle degrees Essential
Braiding Information
Braid description Essential
Axial fiber type Essential
Braid fiber type Essential
Axial fiber filament count Essential
Braid fiber filament count Essential
Braid angle degrees Essential
Percentage of axial yarn % Essential
Percentage of braid yarn % Essential
Axial yarn spacing in braids in. Recommended
Unit cell width in. Optional
Unit cell length in. Optional
Braider identification Recommended
Number of carriers Recommended
Winding Information
Winding description Essential
Winder identification Recommended
Mandrel identification Essential
E. Prepreg Information
Prepreg Identification
Prepreg type Table 21 Essential
Prepreg commercial name Essential
Prepreg manufacturer [Organization] Essential
Prepreg manufacturer’s internal spec [Specification] Optional
Prepreg source [Organization] Optional
Prepreg dimension parameter Table 22 Recommended
Prepreg dimension value Recommended
Prepreg reinforcement orientation(s) Recommended
Scrim fiber chemical class Table 5 Recommended
Scrim fabric style Recommended
Prepreg additional information Recommended
Prepreg Batch Information
Prepreg batch number Essential
Prepreg batch certification date Optional
D8335−20
Prepreg batch expiration date Recommended
Prepreg batch roll number Recommended
Prepreg Auxiliary
Prepreg fiber areal weight g/m Essential
Prepreg volatile content, wt% wt% Essential
Prepreg fiber content, vol% vol% Recommended
Prepreg matrix content, wt% Wt% Recommended
Prepreg matrix flow Wt% Recommended
Prepreg matrix gel time Recommended
Prepreg tack Optional
Prepreg drape Optional
F. Process Information
Process specification [Specification] Recommended
Process reinforcement application Table 23 Essential
Process mold type Table 24 Essential
Tackifier common name Recommended
Tackifier chemical class Table 16 Recommended
Tackifier form Table 25 Recommended
Tackifier manufacturer Recommended
Process stage type Table 26 Recommended
Process stage temperature C(F) Recommended
Process stage pressure psig Recommended
Process stage vacuum psig Recommended
Process stage duration min Recommended
Process ramp rate C/min (F/min) Recommended
Process stage other parameter degrees Recommended
Processor [Organization] Essential
Process start date Recommended
Process end date Recommended
Process records reference Recommended
G. Part Information
Part form Table 27 Essential
Material orientation code Essential
Part specification [Specification] Recommended
Part dimension parameter Recommended
Part dimension value Recommended
Part history Essential
Part additional information Recommended
Part resin content by weight wt% Essential
Part fiber content, by volume vol% Essential
Part fiber areal weight g/m Essential
Part void content, by volume vol% Essential
Part mass density g/cm Essential
Part glass transition temperature—dry C(F) Essential
Part glass transition temperature—wet C(F) Essential
Footnotes Essential
TABLE 2 Category for Reinforcement Class
that is resin transfer molded would require Material, Fiber,
Fiber Filler Core Matrix, Preform/Winding, Process, and Part blocks.
7.2 Composite Material Identification Block (A)
7.2.1 Composite Material Name—This data element should
by Table 1. The information and data listed in Table 1 are
be constructed, using CMH-17, as:
categorized as being essential, recommended, or optional. The
[Composite Material Name] = [Fiber Commercial Name] + “ ” + [Tow
units listed for numerical data are SI, in accordance with or Filament Count] + “/” + [Matrix Commercial Name] + “ ” + [Fabric
Weave Type] + “ ” + [Critical Processing Information]
IEEE/ASTM SI 10, followed by inch-pound units in parenthe-
ses. The tables (Tables 2-10 and Tables 15-27) referenced in 7.2.2 Material Subclass—This data element should be con-
Table 1 provide more detailed information needed to define a structed as:
composite material in terms of its fiber, filler, core, matrix,
[Matrix Subclass] = [Fiber Class] + ‘/’ + [Matrix Class]
preform, prepreg, process, orientation, and part properties.
7.3 Fiber Identification Block (B)
Note that the third column indicates the level of requirement.
7.4 Matrix Identification Block (C)
The information for identifying materials is divided into seven
blocks: Composite, Fiber, Matrix, Preform, Prepreg, Process, 7.5 Preform Identification Block (D)—For the purposes of
and Part. Depending on the constituents of the material and this guide, preform encompasses all types of fiber assembli
...