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The aim of this work is to propose a gradient dependent fatigue criterion and check its predictive capabilities for non-zero gradient multiaxial stress systems. Uniaxial experimental results (bending and torsion) are examined to demonstrate the gradient effect. Based on these results a gradient dependent fatigue criterion of the critical plane type is formulated. The proposed formula is applied in fully reversed in-phase bending and torsion loading. It is shown that, within the framework of the proposed approach, the discrepancies between experimental results of gradient-free stress conditions and loads introducing non-zero stress gradients are eliminated.

Additional information

Authors: PAPADOPOULOS I V, JRC Ispra (IT);PANOSKALTSIS V P, Case Western Reserve University, Department of Civil Engineering, Cleveland, Ohio (US)
Bibliographic Reference: Paper presented: 4th International Conference on Biaxial/Multiaxial Fatigue, Parigi (ID), May 31 - June 3, 1994
Availability: Available from (1) as Paper EN 38167 ORA
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