Transactions of Materials and Heat Treatment

Title：Study on flow stress and friction factor by rod-rod combined extrusion based on inverse analysis

Authors： Huang Zhichao Chen Wei Zhan Jinqing Xue Shuguang

Unit： East China Jiaotong University China Youngman Automobile Group

KeyWords： rod-rod combined extrusion inverse analysis FEM flow stress friction factor

ClassificationCode：TG376

year,vol(issue):pagenumber：2014,39(6):122-124

Abstract：

Flow stress and friction factor were studied by rod-rod combined extrusion based on inverse analysis. Material parameters in metal forming simulation process were determined by finite element method and optimization inverse analysis algorithm. The simulation data and experiment data of load-stroke curve and ratio of up/down rod height of rod-rod combined extrusion were compared by inverse analysis technique to determine the real flow stress and friction factor in the extrusion and deformation process. The effectiveness of the inverse analysis algorithm was tested by extrusion experiments, and inverse analysis methods were used to modify the flow stress curve. The high precision and the friction factor in the extrusion experiment process are acquired after two corrections.

Funds：

国家自然科学基金资助项目（51265012）；江西省主要学科学术和技术带头人培养对象计划资助项目（20113BCB22010）；江西省“赣鄱英才555工程”领军人才培养计划资助项目(赣才字［2012］1号)

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