000012642 001__ 12642
000012642 005__ 20160920162635.0
000012642 04107 $$aeng
000012642 046__ $$k2016-09-05
000012642 100__ $$aŠebek, F.
000012642 24500 $$aThe role of loading path in ductile fracture

000012642 24630 $$n6.$$pInsights and Innovations in Structural Engineering, Mechanics and Computation
000012642 260__ $$bTaylor and Francis Group, London, UK
000012642 506__ $$arestricted
000012642 520__ $$2eng$$aThe ductile fracture in monotonic loading applies after extensive straining and may arise after various complex loading paths. The role of loading path has been studied by experiments designed to evaluate, how the deviation from proportional loading influenced the point of fracture. Key role in this process plays the damage accumulation, which is in many applications often assumed as a linear function of cumulative plastic strain. Nevertheless, a number of non-linear damage evolution laws have already been proposed in recent literature. Adopting these, stepwise loading experiments were suggested and realized to provide a basis for calibration of models describing such behaviour. Those experiments are based on loading the specimen under one stress state, changing the conditions, and straining until fracture. Changing the stress state might be performed by elevating the hydrostatic pressure during the experiment, which is unfortunately rather expensive. Another possible way is to change the specimen geometry between subsequent loading steps. This strategy was adopted here and applied to calibration of the damage accumulation law of 2024-T351 aluminium alloy. Very high sensitivity of calibrated parameter to change of state variables entering the calculations was observed, which complicated obtaining relevant data applicable to computational simulations of real industrial cold forming processes.

000012642 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012642 653__ $$a

000012642 7112_ $$aSixth International Conference on Structural Engineering, Mechanics and Computation$$cCape Town, South Africa$$d2016-09-05 / 2016-09-07$$gSEMC2016
000012642 720__ $$aŠebek, F.$$iPetruška, J.$$iKubík, P.
000012642 8560_ $$ffischerc@itam.cas.cz
000012642 8564_ $$s1807285$$uhttps://invenio.itam.cas.cz/record/12642/files/090.pdf$$yOriginal version of the author's contribution as presented on CD, 090.pdf.
000012642 962__ $$r12552
000012642 980__ $$aPAPER