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GB/T 44162-2024: Implementation specification for estimating Weibull distribution parameters of tensile strength for carbon materials
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| GB/T 44162-2024 | English | 199 |
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Implementation specification for estimating Weibull distribution parameters of tensile strength for carbon materials
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GB/T 44162-2024
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Basic data | Standard ID | GB/T 44162-2024 (GB/T44162-2024) | | Description (Translated English) | Implementation specification for estimating Weibull distribution parameters of tensile strength for carbon materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q52 | | Classification of International Standard | 29.050 | | Word Count Estimation | 10,185 | | Date of Issue | 2024-07-24 | | Date of Implementation | 2025-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 44162-2024: Implementation specification for estimating Weibull distribution parameters of tensile strength for carbon materials
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GB/T 44162-2024 English version. Implementation specification for estimating Weibull distribution parameters of tensile strength for carbon materials
ICS 29.050
CCSQ52
National Standard of the People's Republic of China
Weibull distribution of tensile strength of carbon materials
Parameter Estimation Implementation Specification
Released on 2024-07-24
2025-02-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
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
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 3358.1 Statistical vocabulary and symbols Part 1.General statistical terms and terms used in probability
GB/T 8170 Rules for rounding off values and expression and determination of limit values
GB/T 8721 Determination of tensile strength of carbon materials
GB/T 34987 Weibull analysis
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 (σ) failure probability is shown in formula (2).
Pf=1-exp -
Sc
me
êê
úú,σ >0 (2)
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