摘要
为解决报废汽车及家用电器的高效循环再生利用问题,根据摆锤式破碎机的工作原理及破碎过程力学模型,构建轻薄型回收金属破碎试验装置;借助检测分析,得到所选回收金属材料的力学性能参数;利用放大50倍的光学显微镜,获取所选轻薄型回收金属破碎试验前、后的表面外观形貌;通过试验研究,得出如下研究结果:轻薄型回收金属在破碎工具持续冲击作用下,应力应变最为集中的初始表面缺陷及微细裂纹率先失稳、扩展、联片、贯穿,直至大块回收金属碎片(200 mm×200 mm)被从其母体上撕裂下来。在此基础上,采用理论分析与计算机仿真相结合的方法,对轻薄型回收金属材料的破碎过程进行进一步研究,从理论上阐明其破碎损伤规律,给出相应的破碎模式,为建立具有自主知识产权的轻薄型金属材料破碎理论体系奠定基础。
To find solutions to recovery and reuse of end-of-life vehicles and household appliances（ELV and ELHA）,on the basis of the working principle of shredders and dynamic model of shredding process,the experimental shredding installation for light metal scrap is constructed.By way of test and analysis,the mechanical characteristics of the material of test specimen are obtained.With the help of a photoelectrical microscope with 50× magnification,the feature of light metal scrap surface appearance,including surface scratches,is acquired before and after testing,respectively.Through analysis and investigation of experimental results,some conclusions are reached.Under the action of continuous impact by shredding tools,the initial surface defects and small cracks of the light metal scrap with most concentrated stress and strain,take the lead in loss of stability,extension,connection and perforation until large fragments（200 mm×200 mm） are torn off from the light metal scrap.On this basis,by combining theoretical analysis with simulation,the shredding process of light metal scrap is further studied,the shredding damage law is theoretically clarified,and the corresponding shredding modes are presented,which lays the foundation for the establishment of the theoretical system of light metal shredding with independent intellectual property rights.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2011年第12期48-55,共8页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(50974068)
关键词
轻薄型回收金属
破碎模式
报废汽车
计算机仿真
Light metal scrap Shredding mode End-of-life vehicle Numerical simulation
