Elasto-Plastic Springback of Beams Subjected to Repeated Bending/Unbending Histories |
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Authors: | Franc Kosel Tomaz Videnic Tadej Kosel Mihael Brojan |
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Affiliation: | (1) Laboratory for Non-Linear Mechanics, Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia; |
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Abstract: | This contribution investigated repeated elastoplastic pure plane bending/unbending process of beams made of material with
an elastic-linear hardening rheological model. The attention is focused on beams with cross sections which have at least one
axis of symmetry and are initially straight or have constant radius of curvature. Elastoplastic deflection states of beams
after repeated bending/unbending process are determined using the large displacement theory. Experiments were conducted to
verify the theory for beams made of aluminium alloy AA 5050-H38 with rectangular cross sections. It is shown that maximal
relative difference between experimental and theoretical results in the case of a largely curved beams after repeated bending/unbending
process is 1.27%. |
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