摘要
在研究 (Ⅰ )的基础上 ,研究了剪切梁模型在裂纹萌生和失稳扩展阶段的行为特性 ,1)给出了软化失稳 (snap_through)和回折失稳 (snap_back)两种失稳行为发生的条件· 2 )对剪切梁在反平面剪切载荷及侧压力共同作用下的力学行为作了解析分析计算 ,给出了结构的位移—载荷全过程曲线· 3)讨论了失稳过程中的能量释放问题 ,并给出了回折失稳过程中结构对外界的能量释放的计算式·
Based on the (Ⅰ) of the present work, the behavior of shear beam model at crack initiation stage and at instable propagation stage was studied. The prime results include: 1) discriminant equation which clarifies the mode of instability, snap_back or snap_through, was established; 2) analytical solution was given out for the double shear beam and the load_displacement diagram for monotonic loading was presented for a full process; and 3) the problem of the energy release induced by instability was discussed.
出处
《应用数学和力学》
CSCD
北大核心
2000年第11期1109-1116,共8页
Applied Mathematics and Mechanics
基金
欧盟资助课题!(INCO_Copernicus
ERBIC 15CT970 70 6)
东北大学青年科学基金资助课题!( 8560 4 9)
关键词
界面层
反平面剪切
破坏
剪切梁
失稳
软化失稳
回折失稳
损伤
interface layer
antiplane shear
failure
shear beam model
instability
snap_through
snap_back
damage
