A three-dimensional micromechanical finite element cutting model with the thermo-mechanical coupling was developed for carbon fiber reinforced polymer composites in the paper. The finite element modeling considers the three phases of a composite, in which the interphase between the fiber and matrix can realize heat transfer and allow debonding to represent the failure of composites. The model predictions of the machining responses, such as cutting temperature and subsurface damage, at different fiber orientations were compared with various experimental data for model validation. It is indicated that the three phase micromechanical model is capable of precisely predicting cutting temperature and the damage induced by the cutting tool. It was found that cutting temperature and subsurface damage strongly depend on the fiber orientation. Subsurface damage is easily occurs in a fiber orientation range of 90°–135°, while the largest depth of the thermal damage occurs at 90°. In addition, the effect of machining parameters on the cutting temperature was investigated based on the cutting model. It was showed that the cutting speed should be reasonably selected to control the cutting temperature. The temperature decrease with increase the rake angle, while increase with increase depth of cut and radius of cutting edge.

中文翻译：

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使用具有热机械耦合的微观切割模型评估碳纤维增强聚合物复合材料的发热

建立了碳纤维增强聚合物复合材料的热-机械耦合三维微机械有限元切割模型。有限元建模考虑了复合材料的三相，其中纤维和基体之间的界面可以实现传热并允许脱粘来表示复合材料的失效。将不同纤维取向下加工响应（例如切削温度和次表面损伤）的模型预测与各种实验数据进行比较，以进行模型验证。结果表明，三相微机械模型能够准确预测切削温度和刀具引起的损伤。发现切削温度和次表面损伤在很大程度上取决于纤维取向。90°～135°的纤维取向范围内容易发生次表面损伤，而热损伤的最大深度发生在90°。此外，基于切削模型研究了加工参数对切削温度的影响。结果表明，应合理选择切削速度来控制切削温度。温度随着前角的增加而降低，而随着切削深度和切削刃半径的增加而升高。