Pages 623-626
A methodology to constitute three-dimensional finite element model of heterogeneous material, such as textile composite, is investigated on the basis of the X-ray CT image of the cross-section. A new breed of experimental system is devised to obtain the CT images of a specimen successively along the loading axis with short intervals. We discretize the specimen by means of the fixed grid/mesh elements, and identify the material property of elements with relation to the voxel value contained in the element. An inverse problem for the identification is posed in the context of the damage mechanics in consideration of the analogy between the voxel value and effective resisting area. The posed inverse problem is formulated so as to determine the damage variables in the damage effect tensor to realize the displacement field of the specimen observed through the experimental system.
