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GB/T 11546.2-2022Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading (English PDF)

塑料蠕变性能的测定第2部分:三点弯曲蠕变

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

December 30, 2022

Implementation date

April 1, 2023

Scope

GB/T 11546.2-2022 is the English-translated version of 塑料蠕变性能的测定第2部分:三点弯曲蠕变.

GB/T 11546.2-2022 is the Chinese standard "Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading". Its scope clause reads: This document describes a method for the determination of flexural creep of standard specimens of plastics under given conditions such as pretreatment, temperature and humidity.

This document applies only to tests with free support at both ends and loading at the center (three-point bending test).

This document applies to unreinforced, filled and fiber This document applies to molded specimens of specified dimensions, to test specimens machined in the middle of multipurpose specimens. samples, or samples machined from finished or semi-finished products such as molded parts, extruded or cast sheets.

Note 1.Due to the difference in fiber orientation, this document may not apply to some fiber-reinforced materials. Note 2 to entry. Flexural creep will vary greatly with specimen preparation, specimen size and test environment.

The thermal history of the specimen can also affect the creep behavior of the specimen have a greater impact (see Appendix A). This document does not apply to the determination of flexural creep properties of rigid foamed plastics.

The methods described in this document can provide data for engineering design, research and development. If it is used in engineering design, it should be used in a larger range Plastic materials are tested under force, time and environmental conditions. Its clauses include terms and definitions.

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Document preview — GB/T 11546.2-2022

National Standard of the People's Republic of China

ICS: 83.080.01
Classification: G 31

Issued by: State Administration for Market Regulation, China National Standardization Administration

foreword
Introduction
1 Scope
2 Normative references
3 Terms and Definitions

1 Scope

This document describes a method for the determination of flexural creep of standard specimens of plastics under given conditions such as pretreatment, temperature and humidity.

This document applies only to tests with free support at both ends and loading at the center (three-point bending test). This document applies to unreinforced, filled and fiber

This document applies to molded specimens of specified dimensions, to test specimens machined in the middle of multipurpose specimens.

samples, or samples machined from finished or semi-finished products such as molded parts, extruded or cast sheets.

Note 1.Due to the difference in fiber orientation, this document may not apply to some fiber-reinforced materials.

Note 2 to entry. Flexural creep will vary greatly with specimen preparation, specimen size and test environment. The thermal history of the specimen can also affect the creep behavior of the specimen have a greater impact (see Appendix A).

This document does not apply to the determination of flexural creep properties of rigid foamed plastics.

The methods described in this document can provide data for engineering design, research and development. If it is used in engineering design, it should be used in a larger range

Plastic materials are tested under force, time and environmental conditions.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 1034 Determination of water absorption of plastics (GB/T 1034-2008, ISO 62.2008, IDT)

GB/T 2035 Plastic terms and their definitions (GB/T 2035-2008, ISO 472.1999, IDT)

GB/T 2918 Standard environment for conditioning and testing of plastic specimens (GB/T 2918-2018, ISO 291.2008, MOD)

GB/T 9341 Determination of bending properties of plastics (GB/T 9341-2008, ISO 178.2001, IDT)

3 Terms and Definitions

The following terms and definitions defined in GB/T 2035 apply to this document.

3.1 creep

The phenomenon that strain increases with time under constant stress.

[Source. GB/T 2035-2008, definition 2.229, modified]

3.2 Bending stress

Stress on the outer surface of the center of the specimen span.

Note. The unit is megapascal (MPa).

[Source. GB/T 2035-2008, definition 2.413, modified] […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 62.2008 · ISO 472.1999 · ISO 291.2008 · ISO 178.2001

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