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Loading conditions may influence the shape of J-δa curves

✍ Scribed by O. Kolednik

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
482 KB
Volume
41
Category
Article
ISSN
0013-7944

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✦ Synopsis

The shape of J-Au curves may depend on whether the test has been conducted under load control (LC) or under displacement control (DC). This is shown experimentally in two multi-specimen J,c tests of a low-strength structural steel. The fracture initiation toughness is the same in both cases but the LC test displays a steeper J-Au curve than the DC test. An explanation of the effect is presented. The effect can appear if the crack extension proceeds discontinuously.

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