±20°钢丝/橡胶复合材料的疲劳损伤累积

[±20°]钢丝/橡胶复合材料的疲劳损伤累积

基金项目: 黑龙江省自然科学基金资助项目(AO309)

详细信息

Center for Composite Materials, Harbin Institute of Technology, Harbin 150001,China

摘要

摘要: 对钢丝帘线增强的橡胶复合材料在拉伸循环载荷下的疲劳损伤累积进行了研究。结果表明:在载荷控制的疲劳过程中,材料的周期最大应变发展曲线呈现明显的三阶段规律。帘线端头处基体裂纹的出现是宏观疲劳损伤的初始,损伤的累积表现为裂纹数量增加、帘线/基体脱粘和层间裂纹的扩展。以动蠕变为参量建立了线性疲劳损伤累积模型,该模型能够较好地预报两级加载条件下材料的第二级疲劳寿命。
- 橡胶复合材料 /
- 疲劳 /
- 动蠕变 /
- 损伤累积
Abstract: The fatigue damage accumulation of laminated steel-cord reinforced rubber composite under T-T loading is studied in this paper. The results indicate that the increase in the maximum strain exhibits a three-stage tendency in the process of fatigue. The macroscopic fatigue damage initiates from the ends of steel cords in the form of a cylindrical crack. Damage propagates along with the increase of crack numbers, the cord/matrix debonding and the growth of interply cracks. By using dynamic creep as the parameter, a linear dynamic creep fatigue damage accumulation model is established. This model can be used in the two-step loading condition to estimate the residual fatigue life of the specimen.
- rubber composite /
- fatigue /
- dynamic creep /
- damage accumulation