有初始缺陷复合材料梁在湿热状态下混沌运动

THE CHAOTIC MOTION OF COMPOSITE BEAM WITH INITIAL DEFECT UNDER MOIST AND THERMAL STATE

在考虑剪切变形的影响基础上，研究了有初始缺陷复合材料梁在湿热状态下的混沌运动，并讨论分 析了剪切变形、初始缺陷、温度、湿度等因素对混沌运动区域的影响．得到了以下结论：当温度升高时，非完 善复合材料梁发生混沌运动区域增大；当初始缺陷程度增加，非完善复合材料梁的混沌运动区域越来越小； 湿度升高时，非完善复合材料梁发生混沌运动区域增大；当考虑剪切变形影响时非完善复合材料梁的混沌 运动区域变大；在湿热状态下理想复合材料梁的混沌运动区域要比非完善复合材料梁的混沌运动区域大．

The chaotic motion of composite beam with initial defect under moist and thermal state was studied considering the influence of shear deformation. And the factors that affect the chaotic motive region, such as shear deformation, initial defect, as well as temperature and humidity were discussed. The following conclusions were obtained： （ 1 ）the chaotic motive region of composite beam with initial defect increases when temperature ascends, or when the extent of the initial defect descends, or when the amount of the humidity rises, or when the influence of shear deformation is taken into account; （2）the chaotic motive region of composite beam without initial defect is larger than that with initial defect under moist and thermal state.