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Fractal Contact Model between DP780 Sheet Metal and Die

China Mechanical Engineering ›› 2013, Vol. 24 ›› Issue (3): 371-374,379.

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#br# Fractal Contact Model between DP780 Sheet Metal and Die

Fu Xiujuan1,2;Chen Chao2;Li Jianjun1

1.State Key Laboratory of Materials Processing and Die & Mould Technology,Huazhong University of Science and Technology,Wuhan,430074
2.Wuhan Institute of Technology,Wuhan,430073

Online:2013-02-10 Published:2013-02-27
Supported by:

National Natural Science Foundation of China（No. 50975108）;
Hubei Provincial Program of Ministry of Education of China（No. Q20111508）

DP780高强度钢板摩擦界面分形接触模型

付秀娟1,2;陈超2;李建军1

1.华中科技大学材料成形与模具技术国家重点实验室,武汉,430074
2.武汉工程大学,武汉,430073

基金资助:
国家自然科学基金资助项目(50975108)；湖北省教育厅资助项目（Q20111508）
National Natural Science Foundation of China（No. 50975108）;
Hubei Provincial Program of Ministry of Education of China（No. Q20111508）

Abstract

Abstract:

A surface topography model of DP780 sheet metal based on fractal theory was established. And the elastic-plastic contact model between DP780 sheet metal and die surface was established based on the sheet surface topography model. The contact model, which treated the die as rigid body,gave the calculation formula of the real contact area under different normal contact loads. Using the model to create friction model the real boundary condition can be obtained, it can improve the simulation accuracy of the FEM.

Key words: high strength sheet metal, surface topography, fractal, contact model

摘要：

根据板料的表面轮廓特点,建立了基于分形理论的DP780板料表面形貌模型,在表面形貌模型的基础上建立了DP780板料和模具的弹塑性接触模型,该模型将模具视为刚性体,导出了板料与模具实际接触面积的计算公式,并确定了实际接触面积与法向载荷的关系。将分形接触模型应用于摩擦模型的建立中,能够获得更为真实的边界条件,可为板料成形数值模拟的准确性提供可靠的理论基础。


关键词: 高强度钢板, 表面形貌, 分形, 接触模型

CLC Number:

TG142

FU Xiu-Juan-1, 2, CHEN Chao-2, LI Jian-Jun-1. #br# Fractal Contact Model between DP780 Sheet Metal and Die[J]. China Mechanical Engineering, 2013, 24(3): 371-374,379.

付秀娟1, 2, 陈超2, 李建军1. DP780高强度钢板摩擦界面分形接触模型[J]. 中国机械工程, 2013, 24(3): 371-374,379.

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#br# Fractal Contact Model between DP780 Sheet Metal and Die

DP780高强度钢板摩擦界面分形接触模型

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