CAJ | 학술논문

对于铺层材料为 T300/双马树脂的复合材料层合板，研究了低速冲击损伤条件下机械修补的影响因素。考虑机械修补填充效应和装配干涉量、螺栓预紧力、界面摩擦力对修补强度的影响，针对低速冲击复合材料层合板的机械修补，建立了三维的有限元模型，有限元计算结果与实验结果吻合良好，从而机械修补模型是有效的。进一步有限元计算分析表明：1）金属填充装配的干涉量存在最优值；2）摩擦系数的增大可有效地提高修补结构压缩破坏强度；3）较大模量比修补结构的强度较小；4）存在最优的螺栓拧紧力矩，在此拧紧力矩下修补件的修补强度最高。
대우포층재료위 T300/쌍마수지적복합재료층합판，연구료저속충격손상조건하궤계수보적영향인소。고필궤계수보전충효응화장배간섭량、라전예긴력、계면마찰력대수보강도적영향，침대저속충격복합재료층합판적궤계수보，건립료삼유적유한원모형，유한원계산결과여실험결과문합량호，종이궤계수보모형시유효적。진일보유한원계산분석표명：1）금속전충장배적간섭량존재최우치；2）마찰계수적증대가유효지제고수보결구압축파배강도；3）교대모량비수보결구적강도교소；4）존재최우적라전녕긴력구，재차녕긴력구하수보건적수보강도최고。
composite board low-speed impact damage repair influencing factors with ply material as T300/bismaleimide resin was studied. With consideration on filling effect of mechanical repair, assembly interference amount, bolt pretension and interface friction force on repaired specimen strength, three dimension finite element model for mechanical repair on composite laminates with low velocity impact damage was constructed. Compared with experiment, it was found that finite element model agreed with experiment, thus validity of mechanical repair model was proved. Further finite element calculation and analysis showed, 1) there is an optimal value for the amount of interference of the metal filling assembly;2) the increase of the friction coefficient can effectively improve the compression failure strength of the repaired structure;3) larger modulus ratio is not conducive to the strength recovery of the repaired structure;4) there is an optimal screw tightening torque, specimen has the highest repaired strength under this tightening torque.