超高压水射流破碎子午线轮胎机理  

Fracture Mechanism of Radial Tyre Rubber under Ultra-high Pressure Water Jet Impact

作　　者：宋守许[1] 田光涛[1] 余德桥 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009

出　　处：《机械工程学报》2014年第12期36-43,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51175139);国家科技支撑计划(2011BAF11B06)资助项目

摘　　要：研究子午线轮胎回收处理的新方法。将超高压水射流技术应用于子午线轮胎橡胶的破碎回收,进行非淹没条件下超高压水射流破碎分离子午线轮胎橡胶试验,得到不同驱动压力破碎后的橡胶粉末和橡胶破碎断面,对轮胎橡胶、橡胶粉末进行粒度分析和低场核磁共振分析以评价破碎回收效果。采用流固耦合方法建立超高压水射流冲击轮胎橡胶的有限元分析模型,计算超高压水射流冲击作用下橡胶材料内部应力分布规律,应用材料失效准则,研究轮胎橡胶受水射流施加高速动载冲击下的破碎行为并与试验结果相验证。对轮胎橡胶断面和橡胶颗粒进行扫面电镜观察,分析轮胎橡胶和橡胶粉末的宏观形貌和微观形态,结合有限元模型计算结果,研究轮胎橡胶的微观破碎机理,认为在橡胶破碎过程中存在拉伸和剪切两种破坏机制,主要微观失效形式有沿晶破坏和穿晶断裂。A new method to recycle radial tyre is studied.The ultra-high pressure water jet technology is applied to achieve the material recycle of radial tyre rubber,the experiments of ultra-high water jet impinging on tread rubber under non-submerged condition are performed,rubber failure surfaces and rubber particles by jet cutting under different actuating pressures are obtained,rubber particle size analysis and low field nuclear magnetic resonance（NMR） analysis are performed to evaluate the recycle performance of this new method.The stress distribution of rubber material interior under the impact of water jet is computed by establishing the finite element model of tread rubber using fluid-structure interaction （FSI） theory,and the fracture behavior of the tread rubber is studied by using damage criterion.The simulation analysis agrees well with the experiment results.Micro-failure mechanism analysis with scanning electron microscope （SEM） for rubber failure surfaces and rubber particles is performed,the results show that the micro-mechanism of rubber failure due to water jet impingement is brittleness tendency ductile fracture in condition of tensile and shearing stress,intergranular damage and transgranular fracture are the main microscopic failure modes.

关 键 词：超高压水射流 子午线轮胎 橡胶回收 流固耦合 破碎机理 

分 类 号：TG156[金属学及工艺—热处理]