๐”– Bobbio Scriptorium
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On a hybrid method to determine strain fields around propagating cracks

โœ Scribed by P.S. Theocaris; H.G. Georgiadis

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
584 KB
Volume
20
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

The moving singularity of the crack tip in a plane-stress plate causes a highly dynamic stress field of varying intensity with time, throughout the period of the propagation of the crack. This dynamic stress field results in a considerable change of the mechanical and optical properties of a strain-rate dependent material. An analysis of this varying dynamic stress field was presented in this paper which contradicts assumptions and simpli~cations introduced in a previous paper , referring to the same problem. For the experimental determination of the &'-factor the optical method of the dynamic caustics was utilized in combination with a high-speed camera and a comparison was sketched between the possibilities of this method and the strain-gauge method used in Ref. .

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