CAJ | 학술논문

研究了复合材料曲梁在受到合拢弯矩作用下发生的屈曲情况,并给出一种理论解析方法来分析这种很可能发生在复合材料弯曲结构中的脱层耦合屈曲问题.该方法是基于曲梁大变形理论及断裂力学而提出来的.文中并用该解析方法分析了一个特定的常见的情况,在该题例中脱层发生在非常靠近内表面处并且突变屈曲就发生在该薄脱层.在文中也对脱层裂纹的弧角对极限载荷的影响进行了研究.
연구료복합재료곡량재수도합롱만구작용하발생적굴곡정황,병급출일충이론해석방법래분석저충흔가능발생재복합재료만곡결구중적탈층우합굴곡문제.해방법시기우곡량대변형이론급단렬역학이제출래적.문중병용해해석방법분석료일개특정적상견적정황,재해제례중탈층발생재비상고근내표면처병차돌변굴곡취발생재해박탈층.재문중야대탈층렬문적호각대겁한재하적영향진행료연구.
The snap buckling case in a curved composite beam under a closing bending moment is dealt with.A theoretical approach is developed for the non-linear problem of delamination buckling which is likely to occur in curved composite structures.The approach is based on large deflection characterisation of a curved beam,coupled with fracture mechanics concepts.The general solution is applied to analyse a special case in which delamination occurs very close to inner surface of the beam and snap buckling happens in this delaminated thin layer. The effect of the arc angle of delamination crack on the critical load is also studied.