Chipping Brittle Materials: A Finite Element Analysis

Abstract:

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Edge chipping by an indenter has been used to investigate the fragmentation of brittle materials. This paper proposed a constitutive model for studying both the initiation and propagation of cracks during the chipping of concrete. The analysis was carried out by the finite element method using a commercially available code, LS-DYNA. The results showed that a zone with very high compressive stresses appears beneath the indenter and causes the material to break or crush. Most of the external work, about 78%, was dissipated in the crushing zone while only a small percentage (less than 17%) contributed to form chips/fragments. As the indentation proceeded, radian-median cracks initiated and propagated downward and parallel to the front surface of the material to form a half penny crack. The crack tips from both sides of the indenter on the surface would then deviate toward the free edge, leading to a chipping scallop at a critical load.

Info:

Periodical:

Edited by:

Jun Wang,Philip Mathew, Xiaoping Li, Chuanzhen Huang and Hongtao Zhu

Pages:

433-438

DOI:

10.4028/www.scientific.net/KEM.443.433

Citation:

S. S. Mostafavi et al., "Chipping Brittle Materials: A Finite Element Analysis", Key Engineering Materials, Vol. 443, pp. 433-438, 2010

Online since:

June 2010

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$35.00

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