ASTM D5023-01

Standard Test Method for Measuring the Dynamic Mechanical Properties: In Flexure (Three-Point Bending)

SCOPE
1.1 This test method covers the use of dynamic mechanical instrumentation for gathering and reporting the visco-elastic properties of thermoplastic and thermosetting resins and composite systems in the form of rectangular bars molded directly or cut from sheets, plates, or molded shapes. The data generated, using three-point bending techniques, may be used to identify the thermomechanical properties of a plastics material or composition using a variety of dynamic mechanical instruments.
1.2 This test method is intended to provide means for determining the modulus as a function of temperature for a wide variety of plastics materials using nonresonant forced-vibration techniques, in accordance with Practice D 4065. Plots of the elastic (storage); loss (viscous); and complex moduli and tan delta as a function of frequency, time, or temperature are indicative of significant transitions in the thermomechanical performance of the polymeric material system.
1.3 This test method is valid for a wide range of frequencies, typically from 0.01 to 100 Hz.
1.4 Apparent discrepancies may arise in results obtained under differing experimental conditions. These apparent differences from results observed in another study can usually be reconciled, without changing the observed data, by reporting in full (as described in this test method) the conditions under which the data were obtained.
1.5 Due to possible instrumentation compliance, the data generated are intended to indicate relative and not necessarily absolute property values.
1.6 Test data obtained by this test method are relevant and appropriate for use in engineering design.
1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.8 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.
Note 1—There is no similar or equivalent ISO standard.

General Information

• Status: Historical
• Publication Date: 09-Sep-2001
• ICS: 83.080.01 - Plastics in general
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.10 - Mechanical Properties

Relations

• Replaces: ASTM D5023-99 - Standard Test Method for Measuring the Dynamic Mechanical Properties: In Flexure (Three-Point Bending)
• Effective Date: 10-Sep-2001
• Referred By: ASTM D4065-20 - Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
• Effective Date: 10-Sep-2001
• Referred By: ASTM D6382/D6382M-99(2022) - Standard Practice for Dynamic Mechanical Analysis and Thermogravimetry of Roofing and Waterproofing Membrane Material
• Effective Date: 10-Sep-2001

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:D5023–01
Standard Test Method for
Plastics: Dynamic Mechanical Properties: In Flexure (Three-
1
Point Bending)
This standard is issued under the fixed designation D5023; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope* priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This test method covers the use of dynamic mechanical
instrumentation for gathering and reporting the visco-elastic
NOTE 1—There is no similar or equivalent ISO standard.
properties of thermoplastic and thermosetting resins and com-
2. Referenced Documents
posite systems in the form of rectangular bars molded directly
2
or cut from sheets, plates, or molded shapes. The data
2.1 ASTM Standards:
generated, using three-point bending techniques, may be used
D618 Practice for Conditioning Plastics for Testing
to identify the thermomechanical properties of a plastics
D4000 Classification System for Specifying Plastic Mate-
materialorcompositionusingavarietyofdynamicmechanical
rials
instruments.
D4065 Practice for Determining and Reporting Dynamic
1.2 This test method is intended to provide means for
Mechanical Properties of Plastics
determining the modulus as a function of temperature for a
D 4092 Terminology Relating to Dynamic Mechanical
wide variety of plastics materials using nonresonant forced-
Measurements on Plastics
vibrationtechniques,inaccordancewithPracticeD4065.Plots
3. Terminology
oftheelastic(storage);loss(viscous);andcomplexmoduliand
tan delta as a function of frequency, time, or temperature are
3.1 Definitions: For definitions applicable to this test
indicative of significant transitions in the thermomechanical method refer to Terminology D4092.
performance of the polymeric material system.
4. Summary of Test Method
1.3 Thistestmethodisvalidforawiderangeoffrequencies,
typically from 0.01 to 100 Hz. 4.1 A specimen of rectangular cross section is tested in
1.4 Apparent discrepancies may arise in results obtained flexure as a beam. The bar rests on two supports and is loaded
under differing experimental conditions.These apparent differ- by means of a loading nose midway between the supports.The
ences from results observed in another study can usually be test specimen of known geometry is placed in mechanical
reconciled,withoutchangingtheobserveddata,byreportingin linear displacement at fixed frequencies at either isothermal
full (as described in this test method) the conditions under conditions or with linear temperature increases. The elastic
which the data were obtained. moduli or loss moduli, or both, of the polymeric material
1.5 Due to possible instrumentation compliance, the data system are measured using three-point bending.
generated are intended to indicate relative and not necessarily
NOTE 2—Theparticularmethodformeasurementoftheelasticandloss
absolute property values.
moduli and tan delta depends upon the individual instrument’s operating
1.6 Test data obtained by this test method are relevant and
principles.
appropriate for use in engineering design.
5. Significance and Use
1.7 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5.1 This test method provides a simple means of character-
only.
izing the thermomechanical behavior of plastics materials
1.8 This standard does not purport to address all of the
using very small amounts of material. The data obtained may
safety concerns, if any, associated with its use. It is the
be used for quality control, research and development, and
responsibility of the user of this standard to establish appro-
establishment of optimum processing conditions.
1 2
This test method is under the jurisdiction ofASTM Committee D20 on Plastics For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and is the direct responsibility of Subcommittee D20.10 on Mechanical Properties. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Current edition approved September 10, 2001. Published November 2001. Standards volume information, refer to the standard’s Document Summary page on
Originally published as D5023–89. Last previous edition D5023–99. the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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D5023–01
5.2 Dynamic mechanical testing provides a sensitive test 8. Test Specimens
method for determining thermomechan
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