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ASTM C364-99

(Test Method)

Standard Test Method for Edgewise Compressive Strength of Sandwich Constructions

Standard Test Method for Edgewise Compressive Strength of Sandwich Constructions

SCOPE
1.1 This test method covers the determination of flat structural sandwich construction compressive properties in a direction parallel to the sandwich facing plane.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses may be approximate.  
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
09-Oct-1999
ICS
83.120 - Reinforced plastics
Technical Committee
D30 - Composite Materials
Drafting Committee
D30.09 - Sandwich Construction
Current Stage
Ref Project

Relations

Referred By
ASTM C481-99(2016) - Standard Test Method for Laboratory Aging of Sandwich Constructions
Effective Date
10-Oct-1999
Referred By
ASTM D8454/D8454M-22 - Standard Test Method for Open-Hole Compressive Strength of Sandwich Constructions
Effective Date
10-Oct-1999
Referred By
ASTM D8287/D8287M-22 - Standard Test Method for Compressive Residual Strength Properties of Damaged Sandwich Composite Panels
Effective Date
10-Oct-1999

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ASTM C364-99 - Standard Test Method for Edgewise Compressive Strength of Sandwich ConstructionsASTM C364-99 - Standard Test Method for Edgewise Compressive Strength of Sandwich Constructions
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ASTM C364-99 - Standard Test Method for Edgewise Compressive Strength of Sandwich Constructions
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Designation:C364–99
Standard Test Method for
Edgewise Compressive Strength of Sandwich
Constructions
This standard is issued under the fixed designation C 364; 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 or by bending of the sandwich, resulting in crimping near the
ends as a result of shear failure of the core or failure in the
1.1 This test method covers the determination of flat struc-
facing-to-core bond.
tural sandwich construction compressive properties in a direc-
3.3 This test method provides a standard method of obtain-
tion parallel to the sandwich facing plane.
ing sandwich edgewise compressive strengths for panel design
1.2 The values stated in SI units are to be regarded as the
and research and development.
standard. The inch-pound units given in parentheses may be
approximate.
4. Apparatus
1.3 This standard does not purport to address all of the
4.1 Testing machine, capable of maintaining a controlled
safety concerns, if any, associated with its use. It is the
loading rate and indicating the load with an accuracy of 61%
responsibility of the user of this standard to establish appro-
of the indicated value. The accuracy of the test machine shall
priate safety and health practices and determine the applica-
be verified in accordance with PracticesE4.
bility of regulatory limitations prior to use.
4.2 Spherical bearing block, preferably of the suspended,
2. Referenced Documents self-aligning type.
4.3 Straingage,capableofmeasuringstraintoatleast0.001
2.1 ASTM Standards:
mm/mm (0.0001 in./in.) and having a gage length not greater
E4 Practices for Force Verification of Testing Machines
than two thirds of the unsupported length of the specimens to
3. Significance and Use
be tested.
4.4 Micrometer, gage, or caliper, capable of measuring
3.1 The edgewise compressive strength of short sandwich
accurately to 0.025 mm (0.001 in.).
construction specimens provides a basis for judging the load-
carrying capacity of the construction in terms of developed
5. Test Specimens
facing stresses as compared to the facing yield stress.
5.1 The test specimens shall be rectangular in cross section.
3.2 The sandwich column, no matter how short, usually is
The width of the specimens shall be at least 50 mm (2 in.) but
subject to a buckling type of failure unless the facings are so
not less than twice the total thickness nor less than four
thick that they themselves are in the short column class. The
complete honeycomb cells. The unsupported length (dimen-
failure of the facings manifests itself by wrinkling of the
sion parallel to direction of applied load) shall be not greater
facing, in which the core deforms to the wavy shape of the
than eight times the total thickness.
facings; by dimpling of the facings into the honeycomb cells;
5.2 Take care in preparing the test specimens to ensure
smooth end surfaces free of burrs. The ends shall be parallel to
This test method is under the jurisdiction of ASTM Committee D30 on
each other and at right angles to the length of the specimens.
Composite Materials and is the direct responsibility of Subcommittee D30.09 on
Good flat ends are essential for preventing localized end
Sandwich Construction.
failures. The loaded ends may be potted with resin and then
Current edition approved Oct. 10, 1999. Published February 2000. Originally
published as C 364 – 55T. Last previous edition C 364 – 94.
milled or ground flat.
Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C364–99
6. Conditioning
6.1 When the physical properties of the component materi-
als are affected by moisture, bring the test specimens to
constant weight (61 %) before testing, preferably in a condi-
tioning room having temperature and humidity control, and
make the tests, preferably, in a room under the same condi-
tions. A temperature of 23 6 3°C (73 6 5°F) and a relative
humidity of 50 6 5 % are recommended as standard control
conditions.
7. Procedure
7.1 The length and width dimensions of the specimen shall
be measured to the nearest 0.25
...

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1.1 This test method covers measurement of adhesion (tack) between partially cured (B-staged) composite prepreg and a surface in a peel test, under specified conditions. The test may be conducted to measure tack between a flexible layer of prepreg and another prepreg layer bonded to a rigid substrate (Method I) or a rigid metal substrate (Method II). This test method is primarily geared towards material characterization for automated material layup but can be modified for use with other processes. It is well known that material tack is a function of multiple processing and environmental variables. Permissible composite prepreg materials include carbon, glass, and aramid fibers within a B-staged thermoset resin.  
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5.1 This test method is designed to determine the glass transition temperature of continuous fiber reinforced polymer composites using the DMA method. The DMA Tg value is frequently used to indicate the upper use temperature of composite materials, as well as for quality control of composite materials.
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1.1 This test method covers the procedure for the determination of the dry or wet (moisture conditioned) glass transition temperature (Tg) of polymer matrix composites containing high-modulus, 20 GPa (> 3 × 106 psi), fibers using a dynamic mechanical analyzer (DMA) under flexural oscillation mode, which is a specific subset of the Dynamic Mechanical Analysis (DMA) method.  
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1.4 The values stated in SI units are standard. The values given in parentheses are non-standard mathematical conversions to common units that are provided for information only.  
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5.1 The prepreg volatiles content, matrix content, reinforcement content, and filler content of composite prepreg materials are used to control material manufacture and subsequent fabrication processes, and are key parameters in the specification and production of such materials, as well as in the fabrication of products made with such materials.  
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5.1 Refer to Guide D8509.
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