Suttner S, Merklein M (2015)
Publication Type: Journal article
Publication year: 2015
Publisher: Elsevier Ltd
Book Volume: 2S
Pages Range: S98-S106
DOI: 10.1016/j.matpr.2015.05.025
Complex parts with sharp corners are on the rise to satisfy increasing customer demands on the design. To realize these parts in single or multistage forming processes the information of the material behavior under linear and non-linear strain paths is essential. As Bauschinger already showed for the material behavior under cyclic loading, a reduction of the subsequent beginning of plastic yielding can be observed. Different research works studied the Bauschinger effect under cyclic proportional loading or non-proportional strain paths mostly with uniaxial pre-straining of the material. In this paper the material behavior under shearing after previous biaxial stretching in the Marciniak test is analyzed for the aluminum alloy AA5182 and the advanced high strength steel DP600. The Marciniak test is suited for biaxial pre-straining due to an almost almost equibiaxial strain state and a homogeneous strain distribution in-plane on the bottom of the specimen up to higher strains than in a biaxial tensile test. The subsequent shear test is realized with a modified shear test specimen according to the ASTM standard. Finally, the influence of biaxal pre-straining on the beginning of plastic yielding under shear condition, the hardening behavior and the maximum reachable shear strain is investigated for a better understanding of the material behavior under non-proportional loading paths.
APA:
Suttner, S., & Merklein, M. (2015). Characterization of the shear stress state under non-proportional strain paths realized by biaxial stretching in the Marciniak Test. Materials Today: Proceedings, 2S, S98-S106. https://dx.doi.org/10.1016/j.matpr.2015.05.025
MLA:
Suttner, Sebastian, and Marion Merklein. "Characterization of the shear stress state under non-proportional strain paths realized by biaxial stretching in the Marciniak Test." Materials Today: Proceedings 2S (2015): S98-S106.
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