RESEARCH ON DYNAMIC PHOTOELASTIC EXPERIMENTAL METHOD BASED ON THREE-DIMENSIONAL MODEL
The dynamic photoelasticity has been widely utilized to investigate the dynamic phenomena generated by impact loading. The dynamic parameters of structures, such as propagation of stress wave and dynamic stress concentration, are obtained through this method, which provide guidelines for structure design and optimization. In the previous studies, the twodimensional models in most cases are wildly used by researchers. It leaves something to be desired, such as the inaccuracy of the boundary conditions which leads to the error amplified when the conversion of the model testing results into actual ones are happened. This paper put forward the dynamic photoelastic experimental method, in which threedimensional models are used. An improved digital dynamic photoelastic system is also adopted to calculate elastic wave propagation in the medium, in which the diode-pumped solid-state green laser and high-speed CCD are used as light source luminaries and recording system respectively. Based on these models, in which the boundary conditions approach to true value, the resulting data are higher in resolution than is possible with other experimental techniques. This method has been adopted in a researching project successfully, and better results have been obtained.
dynamic photoelastic experimental method three-dimensional model stress wave high-speed CCD
Bin Li Guobiao Yang Fan Ni Qirong Zhu
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai, China The Paradigm Center of Mechanics Laboratory of Ministry of Education, Tongji University, Shanghai, C
国际会议
广州
英文
210-214
2010-12-17（万方平台首次上网日期，不代表论文的发表时间）