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Structural Design of the Geometrical Shape of Interfaces in Bonded Dissimilar Materials Based on Theoretical Elastic Analysis

Published online by Cambridge University Press:  10 February 2011

Masayoshi Tateno ,
Yasushi Fukuzawa ,
Shigeru Nagasawa  and
Hiroshi Sakuta
Masayoshi Tateno
Affiliation:
Kogakuin University, 2665–1,Nakano, Hachioji, Tokyo, 192–0015, Japan
Yasushi Fukuzawa
Affiliation:
Nagaoka Uniersity of Technology, 1603–1 Kamitomioka, Nagaoka, Japan
Shigeru Nagasawa
Affiliation:
Nagaoka Uniersity of Technology, 1603–1 Kamitomioka, Nagaoka, Japan
Hiroshi Sakuta
Affiliation:
Aoyama Gakuin University, 6–16–1 Chitosedai, Setagaya, Tokyo, Japan
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Abstract

In order to evaluate the practical strength of a joint and its fracture mode, it is important to find the stress distribution near the edge of the interface by analyses of strength and fracture. The index of stress singularity based on theoretical analysis is a useful tool to indicate the stress distribution.

In this paper, investigations on the evaluation of the practical strength of bonded dissimilar materials based on the stress singularity are carried out. The secant stiffness module, which was used for plastics analysis, was applied to the evaluation of thermal elastoplastic behavior near the interface. Spherical conditions of the interface shape were used for the evaluation of stress behavior and the experiment of bonding strength. The relationship between the index of stress singularity, λ, and the practical strength of the bonded TiB2-Ni system was investigated by comparing theoretical λ, which was determined by substituting the secant stiffness module into Bogy's eigenequation, with the practical strength in the edge angle of the interface between 60° and 90° The correlation factor of the relationship between λ and the practical bonding strength of the TiB2-Ni system was found positive. These results show that the structural design of a geometrical interface which is getting a higher strength joint based on the index of stress singularity is verified experimentally.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 586: Symposium M – Interfacial Engineering for Optimized Properties II , 1999 , 273
Copyright
Copyright © Materials Research Society 2000

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References

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