Non-proportional tension-shear experiments in a biaxial test facility


Riel, M. van and Boogaard, A.H. van den and Huetink, J. (2006) Non-proportional tension-shear experiments in a biaxial test facility. In: Ninth ESAFORM Conference on Material Forming 2006, 26-28 April 2006, Glasgow, UK (pp. pp. 323-326).

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Abstract:This paper discusses the results obtained from experiments on DC06 mild steel with a biaxial
test facility. The two presented tests are non-proportional tests consisting of a two stage strain path. First the
samples are deformed in the tensile direction after which simple shear deformation is applied. In the one case
elastic unloading is applied after the tensile deformation, while in the other case the tensile deformation is
directly followed by the simple shear deformation. For the test with elastic unloading a peak in the shear
stress appears directly after the strain path change, while in the test without elastic unloading the shear stress
gradually increases to a uniform stress-strain curve. The difference in the result is explained with reference to
the microstructure evolution.
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Engineering Technology (CTW)
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