Abstract
Problem statement: The present study considers an elastic-plastic contact analysis of a rigid sphere with a deformable flat (Rigid Sphere-model) using finite element analysis. The effect of tangent modulus on the contact behavior of a no adhesive frictionless elastic-plastic contact was analyzed using commercial finite element software ANSYS. Approach: Different materials, in terms of the ratio of Young's modulus to yield strength, had been considered to study the effect of tangent modulus. The Finite Element (FE) contact analysis was carried out by incorporating the various tangent modulus values of different materials. Results: The result clearly shows that for different tangent modulus the material hold different stress values. When this modulus increases the strain hardness value of material was also increased. Conclusion: With increase in tangent modulus, strain hardening resistance to deformation of a material is increased and the material becomes capable of carrying higher amount of load in a smaller contact area.
Highlights
The theory of contact mechanics concerned with the stresses and deformation which arise when the surfaces of two solid bodies are brought into contact
The present study aims to study the effect of contact parameters such as contact area, tangent modulus and hardness for single asperity contact for different materials under loading condition of Rigid
The tangent modulus of the material is not considered in the study of rigid sphere and a deformable flat model so-far
Summary
The theory of contact mechanics concerned with the stresses and deformation which arise when the surfaces of two solid bodies are brought into contact. The two surfaces fit exactly or closely together without deformation (conforming contacts) and the surfaces, or one of the two surfaces, deforms when there is a contact area in between them (non-conforming contact). When two rough solids are brought to contact under a normal preload, contact junctions are formed at their contacting asperity tips, which may deform elastically, elastic plastic or plastic. The Stress and deflections arising from the contact between two solids have practical application in hardness testing, wear and impact damage of engineering ceramics, the design of dental prostheses, gear teeth and ball and roller bearings. The present study is to determine how the contact parameters are influenced in the load carrying capacity of the deformed body under loading condition an understanding tribological phenomenon such as contact fatigue, wear and damage
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