基于多尺度模型的编织复合材料圆管扭转行为有限元模拟  

Finite element simulation of torsion behavior of braided composite tubebased on multi-scale model

作　　者：谷元慧 王曙东[1] 张典堂[2] GU Yuanhui;WANG Shudong;ZHANG Diantang(Yancheng Polytechnic College,Yancheng,Jiangsu 224005,China;Key Laboratory of Eco-Textiles(Jiangnan University),Ministry of Education,Wuxi,Jiangsu 214122,China)

机构地区：[1]盐城工业职业技术学院,江苏盐城224005 [2]生态纺织教育部重点实验室(江南大学),江苏无锡214122

出　　处：《纺织学报》2023年第12期88-95,共8页Journal of Textile Research

基　　金：盐城工业职业技术学院自然科学项目(ygy2005);江苏省高等学校自然科学研究面上项目(21KJB540007);盐城市科技计划专项资金(基础研究计划)项目(YCBK2023019)。

摘　　要：为进一步探究编织复合材料圆管在扭转加载过程中的力学响应,在前期试验研究的基础上,以具有45°编织角的碳纤维/树脂复合材料圆管为例,采用了综合考虑圆管的细观结构和全尺寸模拟计算成本的多尺度方法构建了编织复合材料圆管有限元模型,系统模拟了其扭转加载过程,并分别讨论了圆管单胞的剪切和圆管的扭转渐进损伤过程。结果表明:模拟结果与试验结果具有较高的一致性;圆管单胞在剪切失效之前的损伤分布基本呈对称状态,纤维束早于基体形成损伤,承担主要载荷;纤维束编织路径对圆管的扭转损伤扩展有一定的影响,从损伤出现至结构完全失效的用时很短,损伤单元在扭转加载末期产生于圆管中部,并沿纤维束编织路径扩展,最终形成空间螺旋型损伤剪切带。Objective The mechanical properties of braided composites affect the scope of their applications.However,due to the complexity of the meso-structure of braided composites,the experimental research alone can no longer meet the further exploration of the mechanical properties of braided composites.To further investigate the mechanical response of braided composite tube under torsion loading,it is necessary to establish a finite element model of braided composite tube,which can well reflect the mechanical response state and has low calculation cost.Method On the basis of previous research,a carbon fiber/resin braided composite tube with a 45°braiding angle was selected as a representative research object.Taking into account the meso-structure and full-scale simulation calculation cost,a finite element model of the braided composite tube based on real size was constructed using a micro-meso-macro multi-scale method,and its torsional loading process was systematically simulated.The torsion loading process of the braided composite tube was systematically simulated,and the shear progressive damage of the unit cell and the torsion progressive damage of the tube were discussed separately.The effectiveness of the established model was verified by comparing simulation results with experimental results.Results The simulation results indicated that under XY shear loading,the damage of a braided composite tube unit cell generated first at the weak point where the braided fiber bundles interweave around the unit cell before the damage failure of the unit cell.The damage area was symmetrically distributed(Fig.4).When shear failure generated in the unit cell,the fiber bundle showed significant delamination,which was consistent with the observed phenomenon of fiber separation towards both sides in the fractured fiber bundle in the experimental SEM image(Fig.5).The torsion loading with an angular velocity of 30(°)/min was applied to the finite element model.The torque-twist angle curves and macroscopic failure morphologies obtain

关 键 词：编织复合材料圆管 多尺度模型 有限元模拟 扭转 渐进损伤 

分 类 号：TB332[一般工业技术—材料科学与工程]