塑性变形连接异种材料过程的微观模拟概念

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING Obrabotka Metallov-Metal Working and Material Science Pub Date : 2023-09-15 DOI:10.17212/1994-6309-2023-25.3-36-49
Denis Salikhyanov, Nikolay Michurov
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引用次数: 0

摘要

介绍。不同材料之间的结合强度是层压复合材料最重要的特性,它决定了层压复合材料工业开发的成功与否。为了进一步发展塑性变形连接材料理论,提出了在微观尺度上对不同材料的典型体的连接变形进行计算机模拟,并将应力-应变状态参数与已有的理论机制进行比较。本工作的目的是在微观尺度上分析不同材料在塑性变形下的应力-应变状态,并确定表面氧化膜断裂的起始位置。为了实现这一目标,制定了以下工作任务:1)研究塑性变形粘合的不同材料的表面轮廓;2)采用有限元法模拟不同材料接触面在微尺度上的塑性变形;3)在微观尺度上研究不同材料节理变形的阶段,验证理论机理。研究方法。在Veeco Wyko NT1100光学仿形系统上进行了三维形貌和粗糙度的研究。本文选择Deform-3D有限元仿真包作为主要研究工具。选用铝合金AMg3和D16作为研究材料。结果和讨论。在微观尺度上对AMg3和D16合金表层的接头变形进行了计算机有限元模拟,分析了材料经过各种加工后的表面轮廓,研究了应力-应变状态参数,并与理论机理参数进行了比较。基于对比结果,评价了所提出的理论机制的充分性,并指出了在微观尺度上理论模拟不同材料接头变形的实际困难。微尺度有限元模拟可以研究材料近表层的塑性变形流动,也可以确定表面氧化膜最可能断裂的区域,从而确定不同材料的主要结合区域。
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The concept of microsimulation of processes of joining dissimilar materials by plastic deformation
Introduction. Bond strength between dissimilar materials is the most important characteristic of laminated composites, which determines the success of its development for industrial use. In order to develop the theory of joining materials by plastic deformation, it is proposed to perform computer simulation of joint deformation of representative volumes of dissimilar materials on a microscale and compare the parameters of the stress-strain state with the previously presented theoretical mechanism. The aim of this work is to analyze the stress-strain state of dissimilar materials under plastic deformation on a microscale and to establish the location of the onset of fracture of surface oxide films. To achieve this aim, the following tasks of the work are formulated: 1) to study the surface profiles of dissimilar materials to be bonded by plastic deformation; 2) to simulate by the finite element method (FE) the plastic deformation of contact surfaces of dissimilar materials on a microscale; 3) to study the stages of joint deformation of dissimilar materials on a microscale and verify of the theoretical mechanism. Research methodology. The study of three-dimensional topography and roughness was carried out on a Veeco Wyko NT1100 Optical Profiling System. Deform-3D FE simulation package was chosen as the main research tool. Aluminum alloys AMg3 and D16 were chosen as the materials under study. Results and discussion. In this work, computer FE simulating of the joint deformation of the surface layers of AMg3 and D16 alloys on a microscale was performed, an analysis of the surface profiles of materials after various types of processing was carried out, the parameters of the stress-strain state were studied and compared with the parameters of the theoretical mechanism. Based on the results of the comparison, the adequacy of the proposed theoretical mechanism was assessed, and the practical difficulties of theoretical simulation of the joint deformation of dissimilar materials on the microscale were noted. Microscale FE simulation made it possible to study the flow of plastic deformation in the near-surface layers of materials, as well as to identify areas of the most probable fracture of surface oxide films and, consequently, areas of primary bonding of dissimilar materials.
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来源期刊
Obrabotka Metallov-Metal Working and Material Science
Obrabotka Metallov-Metal Working and Material Science METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
1.10
自引率
50.00%
发文量
26
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