ASTM D7137/D7137M-17

Standard Test Method for Compressive Residual Strength Properties of Damaged Polymer Matrix Composite Plates

SIGNIFICANCE AND USE
5.1 Susceptibility to damage from concentrated out-of-plane forces is one of the major design concerns of many structures made of advanced composite laminates. Knowledge of the damage resistance and damage tolerance properties of a laminated composite plate is useful for product development and material selection.  
5.2 The residual strength data obtained using this test method is most commonly used in material specifications and research and development activities. The data are not intended for use in establishing design allowables, as the results are specific to the geometry and physical conditions tested and are generally not scalable to other configurations. Its usefulness in establishing quality assurance requirements is also limited, due to the inherent variability of induced damage, as well as the dependency of damage tolerance response upon the pre-existent damage state.  
5.3 The properties obtained using this test method can provide guidance in regard to the anticipated damage tolerance capability of composite structures of similar material, thickness, stacking sequence, and so forth. However, it must be understood that the damage tolerance of a composite structure is highly dependent upon several factors including geometry, stiffness, support conditions, and so forth. Significant differences in the relationships between the existent damage state and the residual compressive strength can result due to differences in these parameters. For example, residual strength and stiffness properties obtained using this test method would more likely reflect the damage tolerance characteristics of an un-stiffened monolithic skin or web than that of a skin attached to substructure which resists out-of-plane deformation. Similarly, test specimen properties would be expected to be similar to those of a panel with equivalent length and width dimensions, in comparison to those of a panel significantly larger than the test specimen.  
5.4 The reporting section requires it...
SCOPE
1.1 This test method covers compression residual strength properties of multidirectional polymer matrix composite laminated plates, which have been subjected to quasi-static indentation per Test Method D6264/D6264M or drop-weight impact per Test Method D7136/D7136M prior to application of compressive force. The composite material forms are limited to continuous-fiber reinforced polymer matrix composites with multidirectional fiber orientations, and which are both symmetric and balanced with respect to the test direction. The range of acceptable test laminates and thicknesses is defined in 8.2.
Note 1: When used to determine the residual strength of drop-weight impacted plates, this test method is commonly referred to as the Compression After Impact, or CAI, method.  
1.2 The method utilizes a flat, rectangular composite plate, previously subjected to a damaging event, which is tested under compressive loading using a stabilization fixture.
Note 2: The damage tolerance properties obtained are particular to the type, geometry and location of damage inflicted upon the plate.  
1.3 The properties generated by this test method are highly dependent upon several factors, which include specimen geometry, layup, damage type, damage size, damage location, and boundary conditions. Thus, results are generally not scalable to other configurations, and are particular to the combination of geometric and physical conditions tested.  
1.4 This test method can be used to test undamaged polymer matrix composite plates, but historically such tests have demonstrated a relatively high incidence of undesirable failure modes (such as end crushing). Test Method D6641/D6641M is recommended for obtaining compressive properties of undamaged polymer matrix composites.  
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefo...

General Information

• Status: Historical
• Publication Date: 14-Oct-2017
• ICS: 83.120 - Reinforced plastics
• Technical Committee: D30 - Composite Materials
• Drafting Committee: D30.05 - Structural Test Methods

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7137/D7137M − 17
Standard Test Method for
Compressive Residual Strength Properties of Damaged
1
Polymer Matrix Composite Plates
This standard is issued under the fixed designation D7137/D7137M; 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 system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
1.1 This test method covers compression residual strength
with the standard.
properties of multidirectional polymer matrix composite lami-
1.5.1 Within the text the inch-pound units are shown in
nated plates, which have been subjected to quasi-static inden-
brackets.
tation per Test Method D6264/D6264M or drop-weight impact
1.6 This standard does not purport to address all of the
per Test Method D7136/D7136M prior to application of
safety concerns, if any, associated with its use. It is the
compressive force. The composite material forms are limited to
responsibility of the user of this standard to establish appro-
continuous-fiber reinforced polymer matrix composites with
priate safety, health, and environmental practices and deter-
multidirectional fiber orientations, and which are both symmet-
mine the applicability of regulatory limitations prior to use.
ric and balanced with respect to the test direction. The range of
1.7 This international standard was developed in accor-
acceptable test laminates and thicknesses is defined in 8.2.
dance with internationally recognized principles on standard-
NOTE 1—When used to determine the residual strength of drop-weight
ization established in the Decision on Principles for the
impacted plates, this test method is commonly referred to as the
Compression After Impact, or CAI, method.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.2 The method utilizes a flat, rectangular composite plate,
Barriers to Trade (TBT) Committee.
previously subjected to a damaging event, which is tested
under compressive loading using a stabilization fixture.
2. Referenced Documents
NOTE 2—The damage tolerance properties obtained are particular to the
2
type, geometry and location of damage inflicted upon the plate.
2.1 ASTM Standards:
D792 Test Methods for Density and Specific Gravity (Rela-
1.3 The properties generated by this test method are highly
tive Density) of Plastics by Displacement
dependent upon several factors, which include specimen
D883 Terminology Relating to Plastics
geometry, layup, damage type, damage size, damage location,
D3171 Test Methods for Constituent Content of Composite
and boundary conditions. Thus, results are generally not
Materials
scalable to other configurations, and are particular to the
D3878 Terminology for Composite Materials
combination of geometric and physical conditions tested.
D5229/D5229M Test Method for Moisture Absorption Prop-
1.4 This test method can be used to test undamaged polymer
erties and Equilibrium Conditioning of Polymer Matrix
matrix composite plates, but historically such tests have
Composite Materials
demonstrated a relatively high incidence of undesirable failure
D5687/D5687M Guide for Preparation of Flat Composite
modes (such as end crushing). Test Method D6641/D6641M is
Panels with Processing Guidelines for Specimen Prepara-
recommended for obtaining compressive properties of undam-
tion
aged polymer matrix composites.
D6264/D6264M Test Method for Measuring the Damage
Resistance of a Fiber-Reinforced Polymer-Matrix Com-
1.5 The values stated in either SI units or inch-pound units
posite to a Concentrated Quasi-Static Indentation Force
are to be regarded separately as standard. The values stated in
D6641/D6641M Test Method for Compressive Properties of
each system may not be exact equivalents; therefore, each
Polymer Matrix Composite Materials Using a Combined
Loading Compression (CLC) Test Fixture
1
This test method is under the jurisdiction of ASTM Committee D30 on
Composite Materials and is the direct responsibility of Subcommittee D30.05 on
2
Structural Test Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 15, 2017. Published October 2017. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2012 as D7137/D7137M-12. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D7137_D7137M-17. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7137/D7137M − 12 D7137/D7137M − 17
Standard Test Method for
Compressive Residual Strength Properties of Damaged
1
Polymer Matrix Composite Plates
This standard is issued under the fixed designation D7137/D7137M; 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
1.1 This test method covers compression residual strength properties of multidirectional polymer matrix composite laminated
plates, which have been subjected to quasi-static indentation per Test Method D6264/D6264M or drop-weight impact per Test
Method D7136/D7136M prior to application of compressive force. The composite material forms are limited to continuous-fiber
reinforced polymer matrix composites with multidirectional fiber orientations, and which are both symmetric and balanced with
respect to the test direction. The range of acceptable test laminates and thicknesses is defined in 8.2.
NOTE 1—When used to determine the residual strength of drop-weight impacted plates, this test method is commonly referred to as the Compression
After Impact, or CAI, method.
1.2 The method utilizes a flat, rectangular composite plate, previously subjected to a damaging event, which is tested under
compressive loading using a stabilization fixture.
NOTE 2—The damage tolerance properties obtained are particular to the type, geometry and location of damage inflicted upon the plate.
1.3 The properties generated by this test method are highly dependent upon several factors, which include specimen geometry,
layup, damage type, damage size, damage location, and boundary conditions. Thus, results are generally not scalable to other
configurations, and are particular to the combination of geometric and physical conditions tested.
1.4 This test method can be used to test undamaged polymer matrix composite plates, but historically such tests have
demonstrated a relatively high incidence of undesirable failure modes (such as end crushing). Test Method D6641/D6641M is
recommended for obtaining compressive properties of undamaged polymer matrix composites.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.5.1 Within the text the inch-pound units are shown in brackets.
1.6 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.7 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D3171 Test Methods for Constituent Content of Composite Materials
D3878 Terminology for Composite Materials
D5229/D5229M Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite
Materials
1
This test method is under the jurisdiction of ASTM Committee D30 on Composite Materials and is the direct responsibility of Subcommittee D30.05 on Structural Test
Methods.
Current edition approved April 1, 2012Oct. 15, 2017. Published May 2012.October 2017. Originally approved in 2005. Last previous edition approved in 20072012 as
D7137/D7137M-07.-12. DOI: 10.1520/D7137_D7137M-12.10.1520/D7137_D7137M-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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