CRACK INITIATION POINT DETERMINATION AND DYNAMIC FRACTURE TOUGHNESS FOR CHARPY PRE-CRACKED SPECIMEN

Acta Metall Sin

1992, Vol. 28

Issue (4): 28-33 DOI:

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CRACK INITIATION POINT DETERMINATION AND DYNAMIC FRACTURE TOUGHNESS FOR CHARPY PRE-CRACKED SPECIMEN

LIN Junshan;YAN Wenbin;TU Mingjing Xi'an Jiaotong University

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LIN Junshan;YAN Wenbin;TU Mingjing Xi'an Jiaotong University. CRACK INITIATION POINT DETERMINATION AND DYNAMIC FRACTURE TOUGHNESS FOR CHARPY PRE-CRACKED SPECIMEN. Acta Metall Sin, 1992, 28(4): 28-33.

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Abstract The method to detect the crack initiation point of Charpy pre-cracked specimenunder dynamic loading was studied using strain gauge. The load-time curve and nominalstrain-time curve at the crack tip for impact testing specimens may be simultaneously measuredby twin-channel oscilloscope with high speed sampling and diskette storing. Based on the dy-namic finite element simulation of impact response of Charpy specimen, the measuring methodof dynamic fracture toughness was analysed and some problems in previous dynamic fracturetoughness measurement were discussed.

Key words: crack initiation point strain gauge dynamic fracture toughness

Received: 18 April 1992

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1992/V28/I4/28

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