EPJ Web of Conferences (Jun 2010)

DIC-aided biaxial fatigue tests of a 304L steel

  • Le-Roux J.C.,
  • Desmorat R.,
  • Courtin S.,
  • Raka B.,
  • Barbier G.,
  • Vincent L.,
  • Poncelet M.

DOI
https://doi.org/10.1051/epjconf/20100616002
Journal volume & issue
Vol. 6
p. 16002

Abstract

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Several biaxial fatigue tests are conducted up to 106 cycles at room temperature in the context of a collaboration LMT-Cachan / EDF / AREVA / SNECMA / CEA. Malteses cross specimens of 304L steel, designed to initiate crack in the bulk, are loaded by a triaxial testing machine. A Digital Image Correlation technique is used to measure strain during loading and detect crack initiation early. A special optical assembly and a stroboscopic sampling method are set up in this purpose. Several 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.