摘要
采用数字云纹技术对橡胶类材料的大变形断裂力学问题进行了实验分析。提出了数字圆环栅和射线栅技术,给出了该技术的测量原理和方法。应用此技术对橡胶薄板材料的I型断裂的裂尖变形场进行了测量,给出了极坐标系下的实验径向位移场ur和环向位移场uθ的分布图,对实验结果进行了详细的分析,并结合大变形断裂的分区理论模型进行了比较与讨论。
A new digital moiré method is proposed Crack tip of rubber-like materials. With circular displacement are measured directly. The principle are described in detail. An application is carried to analyze the displacement distributions near the and radial gratings, the distributions of in-plane of forming digital moir~ and experimental method out to measure the mechanical field of a cracked rubber sheet under plane stress condition using delicate digital moir6 technique. The radial and circular displacement distributions in the polar coordinate system are obtained. The displacement isolines distributions near the crack tip are discussed. Finally, the distribution rules to mechanical fields near the crack tip are discussed with the sector division method.
出处
《实验力学》
CSCD
北大核心
2007年第3期191-197,共7页
Journal of Experimental Mechanics
关键词
橡胶类材料
数字圆环栅和射线栅
大变形断裂
rubber-like material
digital circular and radial gratings
large deformation fracture
