Thermal Stresses 2001 (Eds. Y. Tanigawa, R.B. Hetnarski, N. Noda), pp. 319-322, 2001

NUMERICAL STUDY ON THE INFLUENCE OF THERMAL RESIDUAL STRESSES IN METAL MATRIX COMPOSITES USING 3/D MULTI-INCLUSION UNIT CELLS

W. Han and H.J. Böhm

CDL Functionally Oriented Materials Design,
Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria


Abstract - Thermal residual stresses in metal matrix composites are studied by three-dimensional multi-inclusion unit cell models that employ a limited number of randomly positioned spherical inclusions embedded in the ductile matrix. The residual stresses due to cooling down are evaluated and predictions of their effects on the mechanical response under unidirectional tensile loading are compared with corresponding results for the initially stress free (virgin) material. The same load cases are studied by planar unit cell models and the results are compared in terms of the predicted overall material properties and the microscale stress and strain fields.


(hjb,010610)