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The effect of interacting defects on the HCF behavior of Al-Si-Mg aluminum alloys

机译:相互作用缺陷对Al-Si-Mg铝合金HCF行为的影响

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摘要

Micro porosities generated by the casting process have a deleterious impact on the High Cycle Fatigue (HCF) behavior of the Al-Si-Mg alloys. The current paper presents a numerical study, based on Finite Element Analysis (FEA), aiming to evaluate the influence of complex micro pores on the aluminum alloys fatigue strength. Therefore, a 3D FE model, representing the porous aluminum, is implemented to determine the stress distribution around artificial defects with different distances between their edges. Work hardening due to the cyclic loading is considered by applying the Lemaitre-Chaboche model. The pore clustering phenomenon is investigated through an evaluation of the stress concentration around the defects, based on FE simulations.
机译:由铸造工艺产生的微观孔隙有对Al-Si-Mg合金的高循环疲劳(HCF)行为具有有害影响。 本文介绍了一个数值研究,基于有限元分析(FEA),旨在评估复杂微孔对铝合金疲劳强度的影响。 因此,实现了代表多孔铝的3D Fe模型,以确定在其边缘之间的不同距离的人工缺陷周围的应力分布。 通过应用Lemaitre-Chaboche模型考虑由于循环负载引起的工作硬化。 通过评估Fe模拟,通过评估缺陷周围的应力浓度来研究孔聚类现象。

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