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Keywords:
ORTHOTROPIC POTENTIAL PROBLEM, INHOMOGENEOUS TERM, TREFFTZ FINITE ELEMENT METHOD, MODIFIED FUNCTIONAL, DUAL RECIPROCITY METHODAbstract
A SIMPLE TREFFTZ-TYPE FINITE ELEMENT METHOD (TFEM) IS PROPOSED FOR SOLVING NONLINEAR POTENTIAL PROBLEMS IN ORTHOTROPIC MEDIA. THE INHOMOGENEITY, WHICH IS INDUCED BY INTERNAL SOURCES, MAY PRODUCE DOMAIN INTEGRALS IN THE STANDARD TREFFTZ FINITE ELEMENT FORMULATION. THIS WILL MAKE THE ADVANTAGE ‘ONLY-BOUNDARY INTEGRATION’ OF TFEM LOSE ENTIRELY. TO OVERCOME THIS DIFFICULTY, THE DUAL RECIPROCITY METHOD (DRM) IS EMPLOYED TO TRANSFER THE ORIGINAL PROBLEM INTO A HOMOGENEOUS ONE. THEN, A PARTICULAR SOLUTION (PS) TREFFTZ-TYPE FINITE ELEMENT MODEL IS ESTABLISHED BASED ON THE MODIFIED FUNCTIONAL. THREE BENCHMARK EXAMPLES ARE INVESTIGATED BY THE PROPOSED APPROACH AND COMPARED WITH THE ANALYTICAL SOLUTIONS.
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