Author(s)

M. Vable

Abstract

Tests for multiple materials in Laplace and plate bending problems M. Vable Mechanical Engineering-Engineering Mechanics, Michigan Technological University, U S.A Abstract Boundary Element Method has proven to have very good resolution for gradients of secondary variables such as heat in conduction problems and moments and shear forces in plate bending problems. Strong gradients in secondary variables can exist near the interface of two materials, particularly when material properties change significantly. These gradients in secondary variables due to changes in material properties can interact with the gradients fiom geometric features such as corners and cracks. Experience with homogenous material has established that good resolution of gradients require a graded mesh, but mesh refinement techniques are difficult to implement for multiple materials. The complexity in the results due to factors described above make most of the available tests for multiple material problems less than desirable

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