CAJ | 학술논문

目的：研究湿热环境对CCF300复合材料层合板载荷放大系数的影响。方法以铺层方式为[45°/0°/-45°/90°/0°2/45°/0°-45°/0°]2s的CCF300/5228A复合材料层合板为研究对象，对其进行恒定环境与常幅疲劳载荷的非共同作用实验，采用改进的联合威布尔分布分析复合材料的疲劳寿命分散性，并运用MATLAB软件编写程序，分别计算得到其部件的载荷放大系数。结果在研究范围内，随着试验环境中温湿度的增加，复合材料的形状参数单调递减，而载荷放大系数单调递增。结论载荷放大效果并不明显，不能很好地加速该复合材料层合板的疲劳寿命试验，说明湿热环境导致复合材料力学性能下降，但反映到载荷放大系数的影响不大。
목적：연구습열배경대CCF300복합재료층합판재하방대계수적영향。방법이포층방식위[45°/0°/-45°/90°/0°2/45°/0°-45°/0°]2s적CCF300/5228A복합재료층합판위연구대상，대기진행항정배경여상폭피로재하적비공동작용실험，채용개진적연합위포이분포분석복합재료적피로수명분산성，병운용MATLAB연건편사정서，분별계산득도기부건적재하방대계수。결과재연구범위내，수착시험배경중온습도적증가，복합재료적형상삼수단조체감，이재하방대계수단조체증。결론재하방대효과병불명현，불능흔호지가속해복합재료층합판적피로수명시험，설명습열배경도치복합재료역학성능하강，단반영도재하방대계수적영향불대。
ABSTRACT:Objective To study the effect of hydrothermal environment on load enhancement factor of CCF300 composite laminates. Methods The study focused on the CCF300/5228A composite laminates with the stacking sequence of[45°/0°/-45°/90°/0° 2/45°/0°-45°/0°]2s. The non-coupling experiment of constant environment and constant-amplitude fatigue loading was conducted, the dispersion of the fatigue life of the composite material was analyzed by modified joint Weibull distribution, and the MATLAB software was used to develop a program to calculate the load enhancement factor of the part. Results The results showed that the shape parameter of composite materials had monotone decrease when the humiture increased, accordingly the load enhancement factor alsoincreased. Conclusion It showed that under hydrothermal environment, the load enhancement effect was not sufficient to accelerate fatigue of the composite laminates in the fatigue life test, indicating that the mechanical properties decreased, however, the load enhancement factor had no obvious change.