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Date of Publication:2011-01-01

Journal:计算力学学报

Affiliation of Author(s):运载工程与力学学部

Volume:28

Issue:2

Page Number:237-242

ISSN No.:1007-4708

Abstract:A new smoothed elastic bi-modular constitutive relationship is
   presented, therefore the sensitivity of stiffness matrix with respect to
   displacement and the sensitivity of displacement with respect to elastic
   modulus can be obtained conveniently. A FEM and sensitivity analysis
   based numerical model is developed for elastic 1D continuum and truss
   structures with dual extensional/compressive modulus, and Newton-Raphson
   algorithm is employed in the solution process. A number of numerical
   examples are given to verify the proposed algorithm with high computing
   accuracy and efficiency

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