Wiles of Using Hollow Specimens for Fatigue Tests

Abstract:

The paper reports an issue found in using the hollow specimens claimed usually as unnotched. If the goal is to test them under multiaxial loading, the target is to reduce the shear stress gradient by making them thin-walled. Anyhow, the analyses described here show, that this attempt induces an issue unknown previously to authors – the maximum stress in tension loading is found on the inner surface of the tube. The individual effects concerning material and geometry are described.

• Periodical: Applied Mechanics and Materials (Volume 732)
• Pages: 71-76
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.732.71
• Online since: February 2015
• Authors: Jan Papuga*, Miguel Vargas, Milan Růžička
• Keywords: Fatigue Specimens, Out-Of-Phase Loading, Relative Stress Gradient

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