横向纤维搭桥下的脱层屈曲数值模拟

Simulation of Delamination Buckling by Fiber Bridges

基于结构屈曲分析的ANSYS有限元法,在考虑横向纤维搭桥影响下,对矩形薄板的脱层屈曲进行数值模拟.结果表明:考虑纤维搭桥时,结构脱层屈曲的临界载荷大幅度提高;脱层后,屈曲模态将发生扩展并产生多个半波模态;随着约束刚度不断增大,脱层屈曲区域逐渐减小,局部屈曲的范围逐渐靠近受载端,且脱层屈曲的特征长度(半波波长)随之减小,而临界载荷值增大.

Structure buckling analysis was investigated using ANSYS finite element theory. The numerical analysis of the delamination buckling was made to the thin rectangular plate which is affected by fiber bridges, basing on the finite element theory. The result shows that the critical load of the delamination buckling is greatly enhanced taking the fiber bridges into consideration. The mode of buckling is grown in the post-buckling of the delamination and the multiple modes are excitated. The partial-buckling phenomena also happen after the buckling. The greater the constrain stiffness, the smaller the buckling region. And the range of the patial-buekling is more closer to the end in which the load is applied. The characteristic length of the delamination buckling, that which is the length of half wave, decreases and the eritial load increases as the increasing of the stiffness.