单纤维与裂纹交互微力学：完整粘接纤维  

Micromechanics of Single Fiber-Crack Interaction: Completely Bonded Fiber

作　　者：雷振坤[1,2] 王权[1] 邓立波[2] 周灿林[3] 

机构地区：[1]工业装备结构分析国家重点实验室大连理工大学工程力学系,辽宁116024 [2]英国曼彻斯特大学材料科学中心M139PL [3]山东大学物理学院,济南250100

出　　处：《实验力学》2013年第1期49-55,共7页Journal of Experimental Mechanics

基　　金：国家自然科学基金(10972047,11172054);中央高校基本科研业务费(DUT11LK03);山东省博士基金(2006BS0415)资助

摘　　要：使用微拉曼光谱技术研究裂纹前喙Kevlar49芳纶纤维交互微力学行为。在建立Kevlar49芳纶纤维轴向变形与拉曼频移线性关系的基础上,通过逐点测量裂尖前喙完整粘接纤维上的应力分布,探讨了裂纹与完整粘接纤维的交互作用,建立了完整粘接纤维上的应力传递模型。I型裂纹切口前方的高应力区造成粘接完好纤维上出现应力集中,应力强度因子KI影响着纤维应力集中长度。Micromechanics behavior of completely bonded aramid fiber Kevlar49/crack beak interaction was investigated by micro-Raman spectroscopy. A linear relationship between the Raman frequency shift and axial deformation of single Kevlar 49 aramid fiber was established. Raman measurements show that a stress concentration occurs on the completely bonded fiber ahead a crack. The stress transfer model of the completely bonded fiber/crack interaction was established to explain the fiber stress concentration, which caused by the high stresses near the crack tip. Stress intensity factor K~ affects the fiber stress concentration length.

关 键 词：完整粘接纤维 裂纹与纤维交互 界面应力传递 微拉曼光谱技术 

分 类 号：O348.1[理学—固体力学] O438[理学—力学]