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Effect of Specimen Size in the Kolsky Bar

✍ Scribed by Srinivasan Arjun Tekalur; Oishik Sen

Publisher
Elsevier
Year
2011
Tongue
English
Weight
422 KB
Volume
10
Category
Article
ISSN
1877-7058

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✦ Synopsis

In the current investigation, the effect of specimen size in a Kolsky Bar experiment has been analyzed. By a series of experiments, it has been shown that while determining the dynamic stress-strain relationship of a material using a non-cylindrical specimen, a judicious choice of specimen dimensions helps overcome size effects and estimates the flow stress of the material with reasonable accuracy. Similarly a dependence of the strength of the joint on the overlap area has been observed while finding the dynamic strength of an adhesive-bonded single-lap joint.

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In this paper, a simple and effective technique is described for measurement of the viscoplastic tensile strains of specimens in the tension Kolsky bar experiment. The technique uses a Laser Occlusive Radius Detector (LORD) to directly measure the local diametral strain. To verify the accuracy of th