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GB/T 11546.2-2022: Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 11546.2-2022 | English | 359 |
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Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading
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GB/T 11546.2-2022
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Basic data | Standard ID | GB/T 11546.2-2022 (GB/T11546.2-2022) | | Description (Translated English) | Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.080.01 | | Word Count Estimation | 18,139 | | Date of Issue | 2022-12-30 | | Date of Implementation | 2023-04-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 11546.2-2022: Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 83.080.01
CCSG31
National Standards of People's Republic of China
Determination of creep properties of plastics
Part 2.Three-point bending creep
(ISO 899-2.2003, MOD)
Posted on 2022-12-30
2023-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"
drafting.
This document is part 2 of GB/T 11546 "Determination of Creep Properties of Plastics". GB/T 11546 has issued the following parts.
--- Part 1.Tensile creep;
--- Part 2.Three-point bending creep.
This document is modified to adopt ISO 899-2.2003 "Determination of creep properties of plastics - Part 2.Three-point bending creep".
The technical differences between this document and ISO 899-2.2003 and their reasons are as follows.
---Replace ISO 472.1999 (see Chapter 3) with the normatively quoted GB/T 2035 to adapt to the technical conditions of our country;
---Changed the accuracy requirements of timers, micrometers and vernier calipers (see 4.4~4.6), so as to make the requirements of standard instruments standardized;
---Replace ISO 178.2001 (see Chapter 5, 6.2) with the normatively quoted GB/T 9341 to adapt to the technical conditions of our country;
--- Replace ISO 291.2008 (see 6.1) with the normatively quoted GB/T 2918 to adapt to the technical conditions of our country;
--- Replace ISO 62.2008 (see 6.1) with the normatively quoted GB/T 1034 to adapt to the technical conditions of our country.
The following editorial changes have been made to this document.
---Incorporated the amendments of ISO 899-2.2003/Amd.1.2015, the outer margin position of the terms involved is vertical
Double lines (‖) are marked;
--- Added the description of the index number in Figure 1;
---Deleted the duplicated content in 4.1;
--- Added the serial number of the 6.2 formula, and the serial numbers of the subsequent formulas were revised in turn.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Plastics Standardization Technical Committee (SAC/TC15).
This document is drafted by. Beijing Yanshan Petrochemical High Technology Co., Ltd., China Petrochemical Corporation Beijing Chemical Research
Institute, Guangzhou Hengjia Precision Technology Co., Ltd., Zhonglan Chenguang Chengdu Testing Technology Co., Ltd., Xiamen Yinduli Industrial Co., Ltd., Chengde City Precision
Density Testing Machine Co., Ltd., Qingdao Zhongxin Huamei Plastic Co., Ltd., Shandong Dawn Polymer Material Co., Ltd., Huafon Group Co., Ltd.
Division, Dongguan Longde Shoes Co., Ltd., Guangzhou Institute of Quality Supervision and Inspection, Liaocheng University, Beijing Institute of Science and Technology Analysis and Testing Research Institute
Research Institute (Beijing Physical and Chemical Analysis and Testing Center), Jilin Provincial Product Quality Supervision and Inspection Institute, Guangdong Shicheng Plastic Machinery Co., Ltd., Jiangmen De
Zotye Engineering Plastic Technology Co., Ltd., Guangdong Kid New Materials Co., Ltd.
The main drafters of this document. He Chong, Zhe Dongmei, Xie Feipeng, Liu Lirong, Xiangmei, Wang Xinhua, Guo Bin, Wang Xiaoli, Zhao Lei, Wang Xiaohua,
Zhu Wencheng, Chen Weili, Teng Mouyong, Guo Xia, Li Shangyu, Guo Yingying, Zhang Chunhua, Jin Liangwen, Rao Desheng.
Introduction
GB/T 11546 "Determination of Creep Properties of Plastics" is a method standard for the determination of creep properties of plastic materials, which provides a basis for the determination of properties of plastic products.
Provided support. At present, GB/T 11546.1 has already adopted ISO 899-1 equivalently, so ISO 899-2 was adopted for this modification, and GB/T 11546.2 was formulated.
GB/T 11546 consists of two parts.
--- Part 1.Tensile creep. The purpose is to establish a method suitable for determining the tensile creep properties of plastic samples.
--- Part 2.Three-point bending creep. The purpose is to establish a method suitable for determining the three-point bending creep properties of plastic samples.
At present, in the sample preparation and performance measurement standards of polyethylene, polypropylene, polystyrene and other resins in my country, the tensile creep property is regarded as the
An important test item for characterizing and evaluating resin materials. However, there is no standard test method for bending creep in China, and it is impossible to perform bending
Creep testing, therefore, is necessary for international standard conversion in accordance with ISO 899-2.Based on this, the enterprise gets a scientific and reasonable
The variable performance data is of great significance in product research and design of plastic components.
Determination of creep properties of plastics
Part 2.Three-point bending creep
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 creep
The phenomenon that strain increases with time under constant stress.
[Source. GB/T 2035-2008, definition 2.229, modified]
3.2
Bending stress flexuralstress
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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