Local Contact Compliance Relations at Compaction of Composite Powders

[+] Author and Article Information
Olle Skrinjar, Bertil Storåkers

KTH Solid Mechanics,  Royal Institute of Technology, Osquars backe 1, SE-100 44 Stockholm, Sweden

Per-Lennart Larsson

KTH Solid Mechanics,  Royal Institute of Technology, Osquars backe 1, SE-100 44 Stockholm, Swedenpelle@hallf.kth.se

J. Appl. Mech 74(1), 164-168 (Nov 16, 2005) (5 pages) doi:10.1115/1.2165240 History: Received September 26, 2005; Revised November 16, 2005

Local contact behavior of composite powders has been investigated by using the finite element method. In previous analyses of such problems it has in general been assumed that one of the powder materials is rigid while the other deforms at loading as in such a case self-similarity prevails. This is a very good approximation for ceramic/metallic composites but may not be so when the composite consists of two materials of roughly equal hardness. An approximate compliance formula for describing this feature is proposed showing good agreement with corresponding finite element results for representative cases.

Copyright © 2007 by American Society of Mechanical Engineers
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Figure 1

Schematics of the two particle problem

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Figure 2

FE mesh for analysis of contact between two particles with equal radii

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Figure 3

(—), FE results and (- - -) self-similarity solutions at contact between particles of the same materials, A–D

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Figure 4

(—) FE results and (- - -) similarity approximation for material combinations A-B, A-C, A-D, σ1 is the strength parameter of material A in Table 1



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