ASTM E561-21 测定曲线的标准试验方法.pdf

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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards Guides and Remendations issued by the World Trade Organization Technical Barriers to Trade (TBT)Committee. Designation:E561-21 INTERNATIONAL Standard Test Method for Ka Curve Determination' This standard is issued under the fixed designation E561:the number immediately following the designation indicates the year of original adoption or.in the case of revision.the year of last revision.A number in parentheses indicates the year of last reapproval.A superseript epsilon (s)indicates an editorial change since the last revision or reapproval. 1.Scope* Development of International Standards Guides and Re- 1.1 This test method covers the determination of the mendations issued by the World Trade Organization Technical resistance to fracture of metallic materials under Mode I Barriers to Trade (TBT)Committee. loading at static rates using either of the following notched and 2.Referenced Documents precracked specimens:the middle-cracked tension M(T)speci- men or the pact tension...

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