Numerical studies of frictional responses when cutting hybrid CFRP/Ti composite
Numerical studies of frictional responses when cutting hybrid CFRP/Ti composite
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DOI：
10.1007/s00170-016-8512-9
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发表时间：
2016-02
期刊：
影响因子：
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通讯作者：
Jinyang Xu;M. El Mansori
中科院分区：
文献类型：
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作者：
Jinyang Xu;M. El Mansori
在制造业中，由于所涉及的每个堆叠组分的不同性质以及各自较差的加工性，加工CFRP/钛混杂材料通常是一项极具挑战性的任务。目前碳纤维/钛复合切割的研究热点主要是实验研究，成本高、耗时长。本文为用数值方法研究控制双材料加工的关键摩擦响应提供了新的贡献。为此，通过实施不同的本构关系和损伤准则，建立了一个多物理模型来构造堆叠复合材料的各向异性加工性。从比切割能耗、加工表面形貌和影响亚表面损伤的角度，研究了多刀具-工作摩擦行为对CFRP/Ti复合切割的相互影响。重点阐述了切割顺序对混杂切割作业的影响。数值结果表明，复合材料混杂加工中 → 钛的合理切割顺序以及多刀功交互作用对切割摩擦响应的影响起着关键作用。
In manufacturing sectors, machining hybrid CFRP/Ti is usually an extremely challenging task due to the disparate natures of each stacked constituent involved and their respectively poor machinability. The current research focus of hybrid CFRP/Ti cutting was primarily made via the experimental studies, which exhibited high cost and time consuming. In this paper, a new contribution was provided to study the key frictional responses dominating the bi-material machining via the numerical approach. To this aim, a multi-physical model was developed by implementing different constitutive laws and damage criteria to construct the anisotropic machinability of the stacked composite. The interrelated effects of the multi-tool-work frictional behavior on hybrid CFRP/Ti cutting were precisely investigated with respect to the specific cutting energy consumption, machined surface morphology, and affected subsurface damage. A special focus was made to clarify the cutting sequence’s influences on the hybrid cutting operation. The numerical results highlighted the reasonable CFRP → Ti cutting sequence for hybrid composite machining and the pivotal role of multi-tool-work interaction in affecting the frictional responses induced by cutting.