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Effects of material non-linearity on the residual stresses in a dendritic silicon crystal ribbonThermal stresses developed in a dendritic silicon crystal ribbon have been shown to cause plastic deformation and residual stresses in the ribbon. This paper presents an implementation of a numerical model proposed for thermoelastoplastic behavior of a material. The model has been used to study the effects of plasticity of silicon on the residual stresses. The material properties required to implement this model are all assumed, and the response of the material to the variations in these assumed parameters of the constitutive law and in the finite element mesh is investigated. The steady state growth process is observed to be periodic with nonzero residual stresses. Numerical difficulties are also encountered in the computer solution process, resulting in sharp jumps and large oscillations in the stress responses.
Document ID
19900035630
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ray, Sujit K.
(Duke Univ. Durham, NC, United States)
Utku, Senol
(Duke University Durham, NC, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Publication Information
Publication: International Journal for Numerical Methods in Engineering
Volume: 29
ISSN: 0029-5981
Subject Category
Nonmetallic Materials
Accession Number
90A22685
Distribution Limits
Public
Copyright
Other

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