Effect of bulk deformation on viscoplastic adhering process- a numerical study of solid state pressure welding
Article Abstract:
The effects of bulk deformation on the viscoelastic adhering process of metals are investigated. Oxygen free copper specimens are analyzed using a finite element model. The equivalent strain rate is expressed as the sum of two different types of power law creep that occur simultaneously. Results reveal that the interfacial contacting process is produced by the folding phenomenon of the void surface. The bulk constraint is also found to be insignificant during the earlier half of the bonding process.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1993
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Effect of surface asperity on interfacial contact process controlled by power law creep - numerical study of viscoplastic adhering process
Article Abstract:
A finite element method is used to analyze an interfacial contact process controlled by power law creep generated after close contact by instantaneous plastic deformation. This deformation is a function of the asperity angle results in two modes, surface folding at the bond interface and interfacial expansion, for the contact process. The surface folding involves two faying surfaces overlapping each other and favorably occurs when the asperity angle is less than 30 degrees.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1995
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Modeling of viscoplastic adhering process by a finite element technique
Article Abstract:
The use of a finite element procedure for modeling large deformation process of rate sensitive materials is discussed. The new finite element technique was formulated based on the conventional rigidplastic analysis. However, te perturbation method is used in solving the equation governing the generalized virtual work generated by the process. The applicability of this procedure is validated through experimental tests.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1993
User Contributions:
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