CAJ | 학술논문

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。
기우루적손상이론결합유한원자결구방법대복합재료단정궤계련접강도진행료연구。근거층합판특성화라전수력특점，이용자결구건모기술분별구조층합판화라전적자결구。분석료층합판출현손상시，재료삼수퇴화대강도예측적영향。결과표명，련접건제압손상적퇴화삼수취치재흔대정도상영향결구강도예측적결과。침대금속-복합재료단정련접건，통과괄당적삼수퇴화방식득도여시험결과상문합적강도화강도예측，이통과자결구적응용야제고료련접강도계산효솔。
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 .