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Validation of Mechanical Layer Equivalent Method for simulation of residual stresses in additive manufactured components

机译:基于机械层等效方法的验证,用于模拟添加剂中的残余应力

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A challenge in the additive manufacturing process of laser beam melting of metals is the formation of residual stresses, which can cause large part deformations, when the part is released, lower the application range concerning tensile loads and provoke cracks. Due to the complexity and the interaction of different process parameters, the use of experimental studies for investigation is tedious and costly. An effective approach to analyze the effects is the numerical process simulation based on the method of finite elements. In this paper, the recently developed method of Mechanical Layer Equivalent for fast calculations of process induced distortions in laser beam melting is used to analyze the residual stresses during laser beam melting. For this purpose, small test samples have been generated additively and residual stresses have been measured by X-ray diffraction and compared to simulated values. The results show that despite the simplifications the model inhibits reliable prediction of residual stresses can be achieved. (C) 2018 Elsevier Ltd. All rights reserved.
机译:在金属的激光束熔化的添加剂制造过程中的挑战是形成残余应力,这可能导致零件释放时造成大的部分变形,降低了与拉伸载荷的应用范围并引发裂缝。由于不同工艺参数的复杂性和相互作用,使用实验研究进行调查是乏味的且昂贵的。分析效果的有效方法是基于有限元方法的数值处理模拟。在本文中,用于快速计算的最近开发的用于快速计算的激光束熔融的诱导变形的机械层的方法用于分析激光束熔化过程中的残余应力。为此目的,已经产生了小测试样品,并且通过X射线衍射测量了残留的应力并与模拟值进行比较。结果表明,尽管简化了模型抑制可靠预测残余应力。 (c)2018年elestvier有限公司保留所有权利。

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