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Influence of friction on the response of small punch test

Publication Type : Journal Article

Publisher : Springer

Source : Transactions of the Indian Institute of Metals volume 69, pages 617–622 (2016)

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Campus : Amritapuri

School : School of Engineering

Department : Mechanical Engineering

Year : 2016

Abstract : Small specimen test techniques are suitable for assessing the current mechanical properties of in-service components using small volume samples compared to conventional tests. Small punch test is a reliable test method for predicting the post-yield response. The effect of lubrication of the punch-specimen interface on the load–displacement response and strain distribution in the specimen is presented here. Lubricating the punch-specimen interface reduces the ultimate load and also moves the failure site closer to the pole of the punch. It is found that the loading slope changes as a function of displacement. However, its effect on the plastic properties like strength coefficient and strain hardening exponent was considerably less (~6 % with respect to dry condition). Interrupted tests were conducted at different fractions of ultimate load which revealed that the peak strain was greater in dry condition than the lubricated case.

Cite this Research Publication : Raghu V. Prakash and Arunkumar S., “Influence of friction on the response of small punch test”, Conference proceedings, 7th International Conference on Creep, Fatigue and Creep-Fatigue Interaction,19-22 January 2016, IGCAR, Kalpakkam, India, Special Issue of Transactions of Indian Institute of Metals, Springer, Vol. 69, Issue 2, pp.617-622, 2016.

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