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ASTM D6790/D6790M-22

(Test Method)

Standard Test Method for Determining Poisson's Ratio of Honeycomb Cores

Standard Test Method for Determining Poisson's Ratio of Honeycomb Cores

SIGNIFICANCE AND USE
5.1 Certain sandwich panel analyses require the Poisson's ratio of the honeycomb core. It is not possible to measure the honeycomb's Poisson's ratio by conventional methods.  
5.2 This test method provides a standard method of determining the Poisson’s ratio of honeycomb core materials for design properties, material specifications, research and development applications, and quality assurance.  
5.3 Factors that influence the Poisson’s ratio of honeycomb core materials and shall therefore be reported include the following: core material, methods of material fabrication, core geometry, core thickness, core thickness uniformity, cell wall thickness, specimen geometry, specimen preparation, and specimen conditioning.
SCOPE
1.1 This test method covers the determination of the sandwich honeycomb core Poisson's ratio from the anticlastic curvature radii; see Fig. 1.
FIG. 1 Anticlastic Curvature  
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.2.1 Within the text, the inch-pound units are shown in brackets.  
1.3 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 practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

General Information

Status
Published
Publication Date
30-Apr-2022
ICS
49.025.99 - Other materials
Technical Committee
D30 - Composite Materials
Drafting Committee
D30.09 - Sandwich Construction
Current Stage
Ref Project

Relations

Refers
ASTM D5229/D5229M-20 - Standard Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials
Effective Date
01-Mar-2020

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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: D6790/D6790M − 22
Standard Test Method for
1
Determining Poisson’s Ratio of Honeycomb Cores
This standard is issued under the fixed designation D6790/D6790M; 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 E122 Practice for Calculating Sample Size to Estimate,With
Specified Precision, the Average for a Characteristic of a
1.1 This test method covers the determination of the sand-
Lot or Process
wich honeycomb core Poisson’s ratio from the anticlastic
E177 Practice for Use of the Terms Precision and Bias in
curvature radii; see Fig. 1.
ASTM Test Methods
1.2 Units—The values stated in either SI units or inch-
E456 Terminology Relating to Quality and Statistics
pound units are to be regarded separately as standard. The
3. Terminology
values stated in each system are not necessarily exact equiva-
lents; therefore, to ensure conformance with the standard, each
3.1 Definitions—Terminology D3878 defines terms relating
system shall be used independently of the other, and values
to high-modulus fibers and their composites, as well as terms
from the two systems shall not be combined.
relating to sandwich constructions. Terminology D883 defines
1.2.1 Within the text, the inch-pound units are shown in
termsrelatingtoplastics.TerminologyE456andPracticeE177
brackets.
define terms relating to statistics. In the event of a conflict
between terms, Terminology D3878 shall have precedence
1.3 This standard does not purport to address all of the
over the other terminologies.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.2 Symbols:
priate safety, health, and environmental practices and deter-
c = chord measurement
mine the applicability of regulatory limitations prior to use.
CV = coefficient of variation statistic of a sample population
1.4 This international standard was developed in accor-
for a given property (in percent)
dance with internationally recognized principles on standard-
d = depth measurement
ization established in the Decision on Principles for the
R = anticlastic curvature radius
a
Development of International Standards, Guides and Recom-
R = cylinder radius
c
mendations issued by the World Trade Organization Technical
S = standard deviation statistic of a sample population for
n-1
Barriers to Trade (TBT) Committee.
a given property
x = test result for an individual specimen from the sample
1
2. Referenced Documents
population for a given property
2
2.1 ASTM Standards: x¯ = mean or average (estimate of mean) of a sample popu-
lation for a given property
C271/C271M Test Method for Density of Sandwich Core
Materials v = Poisson’s ratio
D883 Terminology Relating to Plastics
4. Summary of Test Method
D3878 Terminology for Composite Materials
4.1 This test method determines the Poisson’s ratio of
D5229/D5229M Test Method for MoistureAbsorption Prop-
sandwich honeycomb core by bending the core around a
erties and Equilibrium Conditioning of Polymer Matrix
cylinder and taking measurements of the anticlastic curvature
Composite Materials
that occurs.
5. Significance and Use
1
This test method is under the jurisdiction of ASTM Committee D30 on
5.1 Certain sandwich panel analyses require the Poisson’s
Composite Materials and is the direct responsibility of Subcommittee D30.09 on
Sandwich Construction.
ratio of the honeycomb core. It is not possible to measure the
Current edition approved May 1, 2022. Published May 2022. Originally
honeycomb’s Poisson’s ratio by conventional methods.
approved in 2002. Last previous edition approved in 2016 as D6790/D6790M – 16.
DOI: 10.1520/D6790_D6790M-22.
5.2 This test method provides a standard method of deter-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
mining the Poisson’s ratio of honeycomb core materials for
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
design properties, material specifications, research and devel-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. opment applications, and quality assurance.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6790/D6790M − 22
6.6 Measurement Devices—Measurements for anticlastic
curvature depth described in 11.6 may be affected by the width
of the sca
...

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: D6790/D6790M − 16 D6790/D6790M − 22
Standard Test Method for
1
Determining Poisson’s Ratio of Honeycomb Cores
This standard is issued under the fixed designation D6790/D6790M; 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 the determination of the sandwich honeycomb core Poisson’s ratio from the anticlastic curvature
radii,radii; see Fig. 1.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in
each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
1.2.1 Within the text, the inch-pound units are shown in brackets.
1.3 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.
1.4 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:
C271/C271M Test Method for Density of Sandwich Core Materials
D883 Terminology Relating to Plastics
D3878 Terminology for Composite Materials
D5229/D5229M Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite
Materials
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or
Process
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E456 Terminology Relating to Quality and Statistics
3. Terminology
3.1 Definitions—Terminology D3878 defines terms relating to high-modulus fibers and their composites, as well as terms relating
1
This test method is under the jurisdiction of ASTM Committee D30 on Composite Materials and is the direct responsibility of Subcommittee D30.09 on Sandwich
Construction.
Current edition approved April 1, 2016May 1, 2022. Published April 2016May 2022. Originally approved in 2002. Last previous edition approved in 20142016 as
D6790 - 14.D6790/D6790M – 16. DOI: 10.1520/D6790_D6790M-16.10.1520/D6790_D6790M-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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

---------------------- Page: 1 ----------------------
D6790/D6790M − 22
FIG. 1 Anticlastic Curvature
to sandwich constructions. Terminology D883 defines terms relating to plastics. Terminology E456 and Practice E177 define terms
relating to statistics. In the event of a conflict between terms, Terminology D3878 shall have precedence over the other
terminologies.
3.2 Symbols:
c = chord measurement
CV = coefficient of variation statistic of a sample population for a given property (in percent)
d = depth measurement
R = anticlastic curvature radius
a
R = cylinder radius
c
S = standard deviation statistic of a sample population for a given property
n-1
x = test result for an individual specimen from the sample population for a given property
1
x¯ = mean or average (estimate of mean) of a sample population for a given property
v = Poisson’s ratio
4. Summary of Test Method
4.1 This test method determines the Poisson’s ratio of sandwich honeycomb core by bending the core around a cylinder and taking
measurements of the anticlastic curvature that occurs.
5. Significance and Use
5.1 Certain sandwich panel analyses require the Poisson’s ratio of the honeycomb core. It is not possible to measure the
honeycomb’s Poisson’s ratio by conventional methods.
5.2 This test method provides a standard method of determining the Poisson’s ratio of honeycomb core material
...

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1.2 This test method requires several specialized pieces of equipment, such as an integrated water sampler and an analytical balance, or a vacuum filtration system. At the client’s discretion, the test soil is either a site-specific soil or a soil that is representative of a target default gradation.  
1.3 The values stated in SI units are the standard, while the inch-pound units are provided for information. The values expressed in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.  
1.4 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 practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

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ASTM
ASTM F2647-07(2023)(Guide)
Standard Guide for Approved Methods of Installing a CVS (Central Vacuum System)

SIGNIFICANCE AND USE
4.1 The suggestions of this guide are intended to provide proper installation materials and practices to be used during the installation of a central-vacuum system.
SCOPE
1.1 This guide demonstrates proper methods for installing a central-vacuum system.  
1.2 Appendix X1 contains additional sources of information that may be helpful to the user of this guide.  
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.4 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 practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

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ASTM
ASTM F2886-17(2023)(Specification)
Standard Specification for Metal Injection Molded Cobalt-28Chromium-6Molybdenum Components for Surgical Implant Applications

ABSTRACT
This specification covers chemical, mechanical, and metallurgical general requirements for metal injection molded (MIM) cobalt-28chromium-6molybddenum components to be used in manufacturing surgical implants. In this specification, the MIM components covered may have been densified beyond their as-sintered density by post-sinter processing. For the chemical requirements, the components supplied in this specification must conform in accordance to the chemical requirements specified herein in Table 1. The product analysis tolerances must also conform to the product tolerances presented in Table 2. The specification also enumerates the mechanical requirements for MIM components wherein the tensile properties of the MIM must conform to the mechanical properties in Table 3. The microstructural requirements and specimen preparation shall be in accordance with Guide E3 and Practice E407.
SCOPE
1.1 This specification covers chemical, mechanical, and metallurgical requirements for metal injection molded (MIM) cobalt-28chromium-6molybdenum components to be used in the manufacture of surgical implants  
1.2 The MIM components covered by this specification may have been densified beyond their as-sintered density by post-sinter processing.  
1.3 Units—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 nonconformance with the standard.  
1.4 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.

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ASTM
ASTM A480/A480M-23a(Specification)
Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

ABSTRACT
This specification covers general requirements for flat-rolled stainless and heat-resisting steel plate, sheet, and strip. The steel shall be made by one of the following processes: electric-arc, electric-induction, or other suitable processes. Heat and product analyses shall conform to the chemical requirements for each of the specific elements. The material shall undergo mechanical tests such as tension test, hardness test, and bend test. Special tests like intergranular corrosion test, permeability test, Charpy impact testing and tests for detrimental intermetallic phases in wrought duplex stainless steels shall be also be performed when required.
SCOPE
1.1 This specification2 covers a group of general requirements that, unless otherwise specified in the purchase order or in an individual specification, shall apply to rolled steel plate, sheet, and strip, under each of the following specifications issued by ASTM: Specifications A240/A240M, A263, A264, A265, A666, A693, A793, and A895.  
1.2 In the case of conflict between a requirement of a product specification and a requirement of this specification, the product specification shall prevail. In the case of conflict between a requirement of the product specification or a requirement of this specification and a more stringent requirement of the purchase order, the purchase order shall prevail. The purchase order requirements shall not take precedence if they, in any way, violate the requirements of the product specification or this specification; for example, by waiving a test requirement or by making a test requirement less stringent.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The SI units are shown in brackets, except that when A480M is specified, Annex A3 shall apply for the dimensional tolerances and not the bracketed SI values in Annex A2. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4 This specification and the applicable material specifications are expressed in both inch-pound and SI units. However, unless the order specifies the applicable “M” specification designation [SI units], the material shall be furnished in inch-pound units.  
1.5 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.

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  • Technical specification
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