摘要
在Chanvillard关于非直纤维静态拔出模型基础上,建立非直纤维的细观动态模型。此模型通过纤维与基体接触界面剪应力的传递考虑纤维的动态拔出过程,并考虑应变率效应。同时,适当选取阈值,建立基于细观损伤演化的纤维脱粘和拔出动态模型。此模型可以很好地模拟Chanvillard关于非直纤维的静态实验结果,并能反映复合材料的应变率影响。
A dynamic meso-scale model for non-straight steel fiber is proposed based on the work of Chanvillard G. The model is time-dependent and related to the impact loading through the interfacial shearing stress along the embedded part of the steel fiber. Thus, properly setting the thresholds, a dynamic model of the fiber's debonding and pullout process considering the evolution of meso-damage is constructed. The rate sensitivity of the reinforcing effect of the steel fibers can be demonstrated in this model. The model prediction fits the experimental data of Chanvillard G for non-straight steel fiber under static condition well.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2004年第1期109-113,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学青年基金(No.10202022)
冲击波物理和爆轰波物理国家重点实验室
中国科学院材料的力学行为和设计重点实验室资助。
