复合材料层合板的动力响应和横向应力分析

基于分层理论并在板厚方取二次位移插值函数推导出正交层合板的动力学方程.得到了简支层合板的振动频率,且能够计算出协调的横向应力.在低阶模态振动下,横向剪应力是造成层合板脱层的主要原因:而在高阶模态振动下-横向正应力在脱层破坏中起主要作用.采用适当模量材料的层合板能有效地降低横向应力,特别是横向正应力.结果表明文中所采用的算法,算式及所编写的程序是可靠的.

Dynamic response and transverse stresses analysis of composite laminated plates

Based on theories of lamination,the governing equations for dynamic response of orthotropic laminated plate were derived using the quadratic interpolation function for displacement in plate thickness direction.And the vibration frequencies were given for free vibration plate with the simply supported boundaries.And the harmonious transverse stresses can be obtained.The interlaminar transverse shear stresses are the main factor,which leads to the delamination of laminated plate in the lower free vibration frequencies.The transverse normal stresses are the main factor in the higher frequencies.The materials with proper module can decrease the interlaminar transverse stresses,especially transverse normal stress in the plates.The results show that the method,the equations and programs are reliable.