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GB/T 41932-2022 English PDF

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GB/T 41932-2022: Plastics - Determination of fracture toughness(GIC and KIC) - Linear elastic fracture mechanics (LEFM) approach
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 41932-2022	English	429	Add to Cart	4 days [Need to translate]	Plastics - Determination of fracture toughness(GIC and KIC) - Linear elastic fracture mechanics (LEFM) approach	Valid	GB/T 41932-2022

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Basic data

Standard ID	GB/T 41932-2022 (GB/T41932-2022)
Description (Translated English)	Plastics - Determination of fracture toughness(GIC and KIC) - Linear elastic fracture mechanics (LEFM) approach
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G31
Classification of International Standard	83.080.01
Word Count Estimation	22,282
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 41932-2022: Plastics - Determination of fracture toughness(GIC and KIC) - Linear elastic fracture mechanics (LEFM) approach

---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 Fracture Toughness (GIC and KIC) of Plastics Linear Elastic Fracture Mechanics (LEFM) method (ISO 13586.2018, MOD) Posted on 2022-12-30 2023-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 symbols 3 5 Sample 4 6 State regulation and test environment 5 7 Instruments and equipment 6 8 Test Step 7 9 Calculation and presentation of results 9 10 Precision 11 11 Test report 12 Appendix A (Informative) Comparison between this document and ISO 13586.2018 structure number 13 Appendix B (informative) Tests for plastics containing short fibers 14 Appendix C (Normative) Correction factor 17 Reference 19

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 modified to adopt ISO 13586.2018 "Determination of Fracture Toughness (GIC and KIC) of Plastics Linear Elastic Fracture Mechanics (LEFM) Law". Compared with ISO 13586.2018, this document has a lot of structural adjustments. For a list of structure number changes between the two documents, see Appendix A. The technical differences between this document and ISO 13586.2018 and their reasons are as follows. --- The chapter "Symbols" (see Chapter 4) has been added to facilitate the operator to understand and use this document; --- Replaced ISO 2818 (see 5.2) with the normatively quoted GB/T 39812 to adapt to my country's technical conditions and increase operability active; --- Replaced ISO 9513 (see 7.1, 7.3) with the normatively quoted GB/T 12160-2019 to adapt to the technical conditions of our country, Increase operability; --- Replaced ISO 7500-1 (see 7.1, 7.2) with the normatively quoted GB/T 16825.1-2022 to adapt to the technical requirements of our country pieces to increase operability; --- Replaced ISO 527-1 (see 9.4) with the normatively quoted GB/T 1040.1 to adapt to my country's technical conditions and increase operability active; --- Replaced ISO 604 (see 9.4) with the normatively quoted GB/T 1041 to adapt to my country's technical conditions and increase operability. The following editorial changes have been made to this document. --- Some explanatory content of the text is changed to Note (see Chapter 1). 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. Sinopec (Beijing) Chemical Research Institute Co., Ltd., China Blue Chenguang Chemical Research and Design Institute Co., Ltd., Guangzhou Heng Jia Seiko Technology Co., Ltd., Qingdao Product Quality Inspection Research Institute, Xiamen Yinduli Industrial Co., Ltd., Dongguan Jing'an New Material Co., Ltd. Company, Shandong Non-metallic Materials Research Institute, Shenzhen Jundingda New Material Co., Ltd., Chengde Precision Testing Machine Co., Ltd., Jilin Province Product Quality Supervision and Inspection Institute, Dongguan Qun'an Plastic Industry Co., Ltd., Jiangsu Taitel New Material Technology Co., Ltd., Shandong Jingcheng Industrial Automation Equipment Co., Ltd. The main drafters of this document. Hu Xiaoyi, Zhe Dongmei, Zhang Yanjun, Xie Feipeng, Qiao Haiqing, Xiangmei, Huang Weihua, Sun Yan, Huang Xing, Wang Xinhua, Li Shangyu, Guo Yingying, Yan Xiaofeng, Han Jianwei, Hua Dingpeng, Zhu Tiange. Determination of Fracture Toughness (GIC and KIC) of Plastics Linear Elastic Fracture Mechanics (LEFM) method

1 Scope

This document describes a method for the determination of the fracture toughness of plastics under given conditions and the mode of crack opening (mode I). In order to adapt to different With different types of equipment or different types of materials, two test methods with pre-cracked specimens are described, namely the three-point bending test and compact specimen tension test. This document applies to the following materials, including composite materials containing short fibers with a length less than or equal to 7.5 mm. --- Rigid and semi-rigid thermoplastic molding, extrusion and casting materials; --- Rigid and semi-rigid thermosetting molding and casting materials. Note 1.It is generally believed that short fibers with a length of 0.1 mm to 7.5 mm will cause heterogeneity and anisotropy in the crack tip region during the fracture process. Appendix B mentions Provides an extension of the applicability of the same test procedure to rigid and semi-rigid thermoplastic or thermoset plastics containing such short fibers under defined conditions test. Note 2.Since the model adopted assumes that the cracked material has linear elastic properties and the crack tip is in a state of plane strain, in order to ensure the validity of the test In order to be effective, certain restrictions are added to the linearity of the force-displacement curve, the width and thickness of the specimen (see 9.4). Cracks are sharp enough to prevent sharper cracks Streaks lead to significantly lower measurement performance values.

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 1040.1 Determination of tensile properties of plastics - Part 1.General principles (GB/T 1040.1-2018, ISO 527-1.2012, IDT) GB/T 1041 Determination of compression properties of plastics (GB/T 1041-2008, ISO 604.2002, IDT) GB/T 12160-2019 Calibration of extensometer systems for uniaxial testing of metallic materials (ISO 9513.2012, IDT) GB/T 16825.1-2022 Inspection of static uniaxial testing machines Part 1.Tensile and (or) compression testing machines force measuring system Inspection and Calibration (ISO 7500-1.2018, IDT) GB/T 39812 Machining preparation of plastic samples (GB/T 39812-2021, ISO 2818.2018, IDT)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 energy release rate energyreleaserate The expansion of the crack area (δA) causes the change of the external work (δUext) and the strain energy (δUs) of the deformed body, and the calculation is shown in formula (1). G= δUext δA - δUs δA (1) Note. In joules per square meter (J/m2) as the unit.

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