复合材料机械连接数值模型和强度研究 -- 西北工业大学,2013,31(6):878-883
论文:2013,Vol:31,Issue(6):878-883
引用本文:
刘向东, 李亚智, 李彪, 胡博海. 复合材料机械连接数值模型和强度研究[J]. 西北工业大学
Liu Xiangdong, Li Yazhi, Li Biao, Hu Bohai. On Numerical Modeling and Tensile Strength of Bolted Composite Joints[J]. Northwestern polytechnical university

复合材料机械连接数值模型和强度研究
刘向东, 李亚智, 李彪, 胡博海
西北工业大学 航空学院, 陕西 西安 710072
摘要:
基于累积损伤理论结合有限元子结构方法对复合材料单钉机械连接强度进行了研究。根据层合板特性和螺栓受力特点,利用子结构建模技术分别构造层合板和螺栓的子结构。分析了层合板出现损伤时,材料参数退化对强度预测的影响。结果表明,连接件挤压损伤的退化参数取值在很大程度上影响结构强度预测的结果。针对金属-复合材料单钉连接件,通过适当的参数退化方式得到与试验结果相吻合的强度和刚度预测,而通过子结构的应用也提高了连接强度计算效率。
关键词:    子结构    复合材料    机械连接    累积损伤   
On Numerical Modeling and Tensile Strength of Bolted Composite Joints
Liu Xiangdong, Li Yazhi, Li Biao, Hu Bohai
College of Aeronautics, Northwestern Polytechnical University, Xi'an 710072
Abstract:
Mechanical strength of single-bolt composite joints was investigated using the cumulative damage theory combined with the finite element substructure technique.In the finite element model of the joint, substructures of laminated plate and bolt were conceived according to their characteristics of loading.The effect of material properties degradation on the strength prediction was analyzed when the damage of laminated plate occurred.The in-vestigation reveals that the selection of parameter values for material properties degradation after the occurrence of damages in composite plays an important role in the prediction of joint strength and stiffness,especially the selection of parameter values for material properties degradation due to compressive damage.A composite single-bolt joint for a kind of metal was analyzed.The predicted results of joint strength and stiffness with suggested selection of parame-ter values for material properties degradation achieve good agreement with test results.The introduction of substruc-ture technique distinctly improves the computing efficiency.
Key words:    bolted joints    computational efficiency    experiments    failure modes    finite element method    laminated composites    loading    materials properties    measurements    mathematical models    stiffness    strength of materials    mechanical joint    progressive damage    substructure   
收稿日期: 2013-04-01     修回日期:
DOI:
基金项目: 航空科学基金(20120953010)资助
通讯作者:     Email:
作者简介: 刘向东(1979-),西北工业大学博士研究生,主要从事复合材料结构力学的研究。
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