基于细观切削仿真的CFRP表面创成机理及切削损伤研究  

Study on Surface Formation Mechanism and Cutting Damage Based on Meso-cutting Simulation for CFRP Composites

作　　者：肖建章 苏航[3] 王桂锋 黄鹏程[1,2] 陈中哲[1] Xiao Jianzhang;Su Hang;Wang Guifeng;Huang Pengcheng;Chen Zhongzhe(Jinhua Polytechnic,Jinhua,Zhejiang 321016,China;不详)

机构地区：[1]金华职业技术学院机电工程学院,浙江省金华市321016 [2]金华职业技术学院浙江省农作物收获装备技术重点实验室 [3]教育部高等学校科学研究发展中心

出　　处：《工具技术》2022年第11期122-127,共6页Tool Engineering

基　　金：浙江省自然科学基金(LQ21E050006);教育部科技发展中心青年专项(202107);浙江省公益技术应用高新项目(LGG19E050010)。

摘　　要：为研究CFRP在加工过程中的加工表面创成机理,建立了基于三相组分材料的CFRP三维细观切削仿真模型。通过定义碳纤维、基体和界面相的各个本构模型,完成了CFRP复合材料的细观切削仿真和验证。通过对不同纤维方向的切削面创成机理分析发现,加工表面变化呈现明显的各向异性,0°纤维角体现在裸露纤维纵向铺成,45°时纤维断口形成规律性起伏的加工面,90°纤维表面由纤维横断口组成。此外,分析已加工面的损伤特点及切削参数对面下损伤深度的影响可知,135°纤维方向的面下损伤深度最大,提高切削速度可以减少面下损伤。In order to study the formation mechanism of machined surface in CFRP cutting, a three dimensional meso-cutting simulation model is developed based on the three constituent phases of CFRP composite materials in this paper.By establishing the constitutive models and failure criteria of the fiber, matrix and interphase, the mesoscopic cutting simulation of CFRP composites are performed and verified.By analyzing the surface formation mechanism for different fiber orientations, the results show that the change of machined surface has obvious anisotropy, in which the bare fibers lay longitudinally at 0° fiber orientation, the fiber fractures form a regular wavy surface at 45° fiber orientation, and the surface composed of the fiber transverse fracture at 90°.Furthermore, the cutting damage on the machined surface and the cutting parameters effect on the depth of subsurface damage are explored based on the cutting model.It is found that the depth of subsurface damage reaches maximum at 135° fiber orientation, and the depth of subsurface damage decreases with increasing cutting speed.

关 键 词：CFRP材料 三相组分 细观切削仿真 切削损伤 纤维方向 

分 类 号：TB332[一般工业技术—材料科学与工程]