摘要
在汽车行业、航空航天等领域,残余应力在产品设计中日益重要,碳纤维在结构轻量化中起着关键作用。通过建立碳纤维层压板的有限元模型,计算实验残余应力,并验证了其准确性与经典层合板理论结果的对比。针对复合材料不同铺层方向结构,通过对层合板前四层残余应力实验值与理论值分析,得到其结构的铺层方向最小残余应力层合板,为层合板设计奠定基础。结果表明,[45/90/-45/0/45/90/-45/0]铺层方向层压板层间残余应力最小,应力分量σx的理论值与实验值最大之差为0.421 MPa。最大剪切应力测量值为1.7103 MPa,最大观测误差值为18.8%。发生在第二次钻孔深度增量(方向为90°)。应力分量σy的理论值与实验值的最大差值为0.7306 MPa,验证了增量钻孔法测复合材料残余应力的可靠性,研究成果可为航空航天领域等复合材料铺层结构的设计及制造提供指导。
In the automotive industry,aerospace and other fields,residual stresses are becoming increasingly important in product design,and carbon fiber plays a key role in structural lightweighting.The finite element model of carbon fiber laminate is established,the experimental residual stress is calculated,and the accuracy is verified to be compared with the theoretical results of classical laminates.According to the structure of the composite materials in different ply directions,the minimum residual stress laminate in the ply direction of the structure is obtained through the analysis of the experimental and theoretical values of the residual stress of the first four layers of the laminate,which lays the foundation for the design of the laminate.The results show that the interlayer residual stress of the laminate in the laminate in the ply direction is the smallest in the ply direction[45/90/-45/0/45/90/-45/0],and the difference between the theoretical value of the stress componentσx and the experimental value is 0.421 MPa.The maximum shear stress is measured at 1.7103 MPa,and the maximum observed error is 18.8%.Occurs in the second drill depth increment(direction is 90°).The maximum difference between the theoretical value of the stress componentσy and the experimental value is 0.7306 MPa,which verifies the reliability of the incremental drilling method to measure the residual stress of composite materials,and the research results can provide guidance for the design and manufacture of composite layup structures in the aerospace field.
作者
俞聪
张克明
YU Cong;ZHANG Keming(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《组合机床与自动化加工技术》
北大核心
2025年第5期82-88,共7页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金资助项目(11802316)。
关键词
增量钻孔法
碳纤维层压板
校准系数矩阵
层合板理论
incremental drilling method
carbon fiber laminate
calibration coefficient matrix
laminated panel theory
