Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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3-Dimensional Elastic-Plastic Contact Analysis Considering Subsurface Plastic Strain in a Half-Space

반무한체 표면아래의 소성변형을 고려한 3차원 탄소성 접촉해석

  • Cho, Yong-Joo (Dept. of Mechanical Engineering, Pusan national University) ;
  • Moon, Kil-Hwan (Dept. of Mechanical Engineering, Pusan national University) ;
  • Lee, Sang-Don (Dept. of Mechanical Engineering, Pusan national University)
  • Published : 2008.04.30
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Abstract

An elastic-plastic contact analysis is developed using a semi-analytical method. The elastic contact is solved within a Hertz theorem. The reciprocal theorem with initial strains is then introduced, to express the surface geometry as a function of contact stress and plastic strains. The irreversible nature of plasticity leads to an incremental formulation of the elastic-plastic contact problem, and an algorithm to solve this problem is set up. Closed form expression, which give residual stresses and surface displacements from plastic strains, are obtained by integration of the reciprocal theorem. The distribution of contact stress, residual stress and plastic strain are obtained by the changed surface geometry.

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References

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