Damage study of an austenitic stainless steel in high cycle multiaxial fatigue regime.

作者：Poncelet M^*; Barbier G; Raka B; Vincent L; Desmorat R

来源：Revue de Metallurgie-Cahiers d Informations Techniques, 2010, 107(2-3): 51-57.

DOI：10.1051/metal/2010006

Damage study of an austenitic stainless steel in high cycle multiaxial fatigue regime. Biaxial fatigue tests are performed up to 1 000 000 cycles at room temperature. Cross specimens of 304L steel thinned in their centre to initiate crack, are loaded by a biaxial testing machine. The strain at the centre of the sample is measured during loading using a stroboscopic Digital Image Correlation (DIC) technique, and crack initiation on the whole gauge zone is early detected by a second DIC-based measurement. A special optical assembly is designed to allow for simultaneous mesurements. Three types of loadings are performed: equibiaxial with a loading ratio R = 0.1, equibiaxial with loading ratio R = -1, pseudo uniaxial (cyclic loading at R = 0.1 in one direction and constant loading in the other). First results are commented.

• 出版日期2010-2
• 单位中国地震局