ASTM F1645/F1645M-16

Standard Test Method for Water Migration in Honeycomb Core Materials

SIGNIFICANCE AND USE
5.1 Water permeability is a fundamental physical property that can be used in conjunction with other properties to characterize honeycomb sandwich core materials. Migration testing can be used to characterize and compare the relative permeability of honeycomb core materials to water.  
5.2 This test method provides a standard method of characterizing the rate of water migration within honeycomb sandwich core materials for design properties, material specifications, research and development applications, and quality assurance.  
5.3 Factors that influence water migration rate characteristics of honeycomb sandwich core materials and shall therefore be reported include the following: core material, methods of material fabrication, core geometry (cell size), core thickness, core thickness uniformity, cell wall thickness, specimen geometry, specimen preparation, specimen conditioning, facing material, facing permeability, adhesive permeability, adhesive thickness, and methods of mass, volume, and water column height measurement.
SCOPE
1.1 This test method covers the determination of water migration in honeycomb core materials.  
1.2 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.  
1.2.1 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Mar-2016
• ICS: 91.100.99 - Other construction materials
• Technical Committee: D30 - Composite Materials
• Drafting Committee: D30.09 - Sandwich Construction

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F1645/F1645M − 16
Standard Test Method for
1
Water Migration in Honeycomb Core Materials
ThisstandardisissuedunderthefixeddesignationF1645/F1645M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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 3. Terminology
3.1 Definitions—Terminology D3878 defines terms relating
1.1 This test method covers the determination of water
to high-modulus fibers and their composites, as well as terms
migration in honeycomb core materials.
relating to structural sandwich constructions. Terminology
1.2 The values stated in either SI units or inch-pound units
D883 defines terms relating to plastics. Terminology E456 and
are to be regarded separately as standard. The values stated in
Practice E177 define terms relating to statistics. In the event of
each system may not be exact equivalents; therefore, each
a conflict between terms, Terminology D3878 shall have
system shall be used independently of the other. Combining
precedence over the other terminologies.
values from the two systems may result in non-conformance
3.2 Symbols:
with the standard.
1.2.1 Within the text the inch-pound units are shown in
CV = coefficientofvariationstatisticofasamplepopulation
brackets.
for a given property (in percent),
S = standard deviation statistic of a sample population for
1.3 This standard does not purport to address all of the
n-1
a given property,
safety concerns, if any, associated with its use. It is the
x = test result for an individual specimen from the sample
responsibility of the user of this standard to establish appro-
1
population for a given property,
priate safety and health practices and determine the applica-
x¯ = mean or average (estimate of mean) of a sample
bility of regulatory limitations prior to use.
population for a given property,
V = volume of water necessary to fill one core cell,
c
2. Referenced Documents
V = volume of water transfused,
f
2
2.1 ASTM Standards:
W = mass of specimen after filling the primary cell with
c
C271/C271M Test Method for Density of Sandwich Core
water,
Materials
W = mass of specimen after water transfusion, and
f
W = mass of specimen after conditioning, prior to water
D883 Terminology Relating to Plastics
i
D3878 Terminology for Composite Materials introduction.
D5229/D5229M TestMethodforMoistureAbsorptionProp-
4. Summary of Test Method
erties and Equilibrium Conditioning of Polymer Matrix
Composite Materials
4.1 This test method consists of bonding a honeycomb core
E122 Practice for Calculating Sample Size to Estimate,With
materialtotransparentfacingsusingawater-resistantadhesive,
Specified Precision, the Average for a Characteristic of a
drilling an access hole through one facing to an individual core
Lot or Process
cell, filling the cell with water, subjecting the filled cell to a
E177 Practice for Use of the Terms Precision and Bias in
constant hydrostatic pressure by maintaining a specified water
ASTM Test Methods
column height, then measuring the amount of water transferred
E456 Terminology Relating to Quality and Statistics
into the honeycomb core specimen (primarily due to diffusion
through the cell walls) within a 24-h period. The amount of
water transferred is presented as an approximate number of
1 honeycomb core cells filled with water.
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.
5. Significance and Use
Current edition approved April 1, 2016. Published May 2016. Originally
5.1 Water permeability is a fundamental physical property
approved in 1995. Last previous edition approved in 2012 as F1645 – 12. DOI:
10.1520/F1645_F1645M-16.
that can be used in conjunction with other properties to
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
characterize honeycomb sandwich core materials. Migration
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
testing can be used to characterize and compare the relative
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. permeability of honeycomb core materials to water.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F1645/F1645M − 16
5.2 This test method provides a standard method of charac- 7.3 Syringe—If the amount of water transferred into the
terizing the rate of water migration within honeycomb sand- honeycomb core material specimen is to be measured
wich core materials for design properties, mat
...

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: F1645/F1645M − 12 F1645/F1645M − 16
Standard Test Method for
1
Water Migration in Honeycomb Core Materials
This standard is issued under the fixed designation F1645/F1645M; 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 water migration in honeycomb core materials.
1.2 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.
1.2.1 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C271/C271M Test Method for Density of Sandwich Core Materials
3
C274 Terminology of Structural Sandwich Constructions (Withdrawn 2016)
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
E1309 Guide for Identification of Fiber-Reinforced Polymer-Matrix Composite Materials in Databases (Withdrawn 2015)
3
E1434 Guide for Recording Mechanical Test Data of Fiber-Reinforced Composite Materials in Databases (Withdrawn 2015)
3. Terminology
3.1 Definitions—Terminology D3878 defines terms relating to high-modulus fibers and their composites.
Terminologycomposites, as C274 defineswell as terms relating to structural 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:
CV = coefficient of variation statistic of a sample population for a given property (in percent)
CV = coefficient of variation statistic of a sample population for a given property (in percent),
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,
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, 2012April 1, 2016. Published May 2012May 2016. Originally approved in 1995. Last previous edition approved in 20072012 as
F1645 – 07.F1645 – 12. DOI: 10.1520/F1645_F1645M-12.10.1520/F1645_F1645M-16.
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

---------------------- Page: 1 ----------------------
F1645/F1645M − 16
V = volume of water necessary to fill one core cell,
c
V = volume of water transfused,
f
W = mass of specimen after filling the primary cell with water,
c
W = mass of specimen after water transfusion, and
f
W = mass of specimen after conditioning, prior to water introduction.
i
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¯5 mean or average (estimate of mean) of a sample population for a given property
V = volume of water necessary to fill one core cell
c
V = volume of water transfused
f
W = mass of specimen after fillin
...