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GB/T 44162-2024Implementation specification for estimating Weibull distribution parameters of tensile strength for carbon materials (English PDF)

炭素材料抗拉强度威布尔分布参数估计实施规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 24, 2024

Implementation date

February 1, 2025

Scope

GB/T 44162-2024 is the English-translated version of 炭素材料抗拉强度威布尔分布参数估计实施规范.

GB/T 44162-2024 is the Chinese national standard covering implementation specification for estimating Weibull distribution parameters of tensile strength for carbon materials. Issued on 24 July 2024, it has been in force since 1 February 2025.

Document preview — GB/T 44162-2024

National Standard of the People's Republic of China

ICS: 29.050
Classification: Q 52

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Implementation Steps Requirements
4.1 Requirements for obtaining test data
4.2 Analysis process requirements

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.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the China Iron and Steel Association.

This document is under the jurisdiction of the National Technical Committee on Steel Standardization (SAC/TC183).

This document was drafted by: Saimai Advanced Materials Co., Ltd., Tsinghua University Shenzhen International Graduate School, Shanxi Jinyang Carbon Co., Ltd.

Company, Metallurgical Industry Information Standards Research Institute.

The main drafters of this document. Yang Hui, Xu Jianping, Xu Hanchun, Wang Xiaoyuan, Wu Jianguo, Lei Shaoyu, Duan Xueliang.

Weibull distribution of tensile strength of carbon materials Parameter Estimation Implementation Specification

1 Scope

This document specifies the implementation steps for estimating the parameters of the Weibull distribution of carbon material tensile strength and describes the corresponding verification methods.

This document applies to the estimation of Weibull modulus and Weibull characteristic strength of carbon materials for tensile strength.

He Weibull parameter estimation of uniaxial strength properties was used in reference.

2 Normative references

GB/T 3358.1

GB/T 8170

GB/T 8721

GB/T 34987

3 Terms and definitions

The terms and definitions defined in GB/T 3358.1 apply to this document.

4 Implementation Steps Requirements

4.1 Requirements for obtaining test data

Multiple tensile strength data are measured according to GB/T 8721 or other applicable standards.

Note 1.The number of samples shall be determined by the parties using this document through separate negotiation based on specific requirements.

Note 2.This document does not specify the sampling of samples. The specific sampling method shall be determined by the parties using this document through separate negotiation based on specific requirements.

4.2 Analysis process requirements

4.2.1 When the continuous variable (x) of the tensile strength of carbon materials satisfies the two-parameter Weibull distribution, its probability density function f(x) is as shown in formula (1). f(x)= Sc Sc m-1 exp - Sc me êê úú,x >0(1) Where.

m --- Weibull modulus, dimensionless, reflects the discreteness of material strength. The higher the value, the smaller the discreteness.

Sc---Weibull characteristic strength, the unit is megapascal (MPa), which reflects the strength of the material.

The cumulative distribution function Pf of tensile strength (sigma) failure probability is shown in formula (2). Pf=1-exp - Sc me êê úú,sigma >0 (2)

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 3358.1 · GB/T 34987

Editions of GB/T 44162

Edition	Title	Revision	Status
GB/T 44162-2024	Implementation specification for estimating Weibull distribution parameters of tensile strength for carbon materials	current edition	Current

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