摘要
本文提出了一个在全息动光弹性瞬态平面应力问题中同时获得分离的等差线及等和线条纹并分解平面瞬态应力的方法。文中给出了框架在冲击荷载作用下不同时刻等差线及等和线的分离条纹图和某个截面不同时刻的动态应力分布。
A method which allows simultaneously separating the isochromatic and isopachic fringes for transient plane stress problems is presented. A set of double pulsed ruby laser and a terbium glass Faraday rotator are used. Double-order timing method is applied in the synchronous system of the impact load and trigger circuit. Separated fringe patterns of a structure component are recorded at nine different instants after impact loading, and the dynamic material-fringe values of isochromatics and isopachics are obtained by experiments. Finally, dynamic stresses distributed along a section at different instanss are resolved.
出处
《固体力学学报》
CAS
CSCD
北大核心
1989年第3期236-243,共8页
Chinese Journal of Solid Mechanics
基金
本课题为国家科委六.五计划重点科研项目
关键词
全息法
动光弹性
旋光法
应力
Terbium glass rotator, Ruby laser, Impact load, Trigger circuit, Isopaehiesp isochromatics, Transient stress.
