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Title: Optimization design for graded porous tubular structures
Authors: Wang, ZW
Tang, CY 
Tsui, CP 
Gao, B
Keywords: Graded porous
Finite element
Issue Date: 2008
Source: Journal of the Serbian Society for Computational Mechanics, 2008, v. 2, no. 2, p. 80-90 How to cite?
Journal: Journal of the Serbian Society for Computational Mechanics 
Abstract: Many natural and advanced biomedical materials are functionally graded porous architectures. Recently, studies on these graded porous structures have been attracted lots of research attentions due to their outstanding strength-to-weight performance. It has been a challenge to analyze this kind of structures mechanically due to the gradation in physical properties within the material. In this article, an optimization technique, which was incorporated with a finite element model, is proposed to design graded porous tubular structures for maximizing their bending strength. The gradation of the physical property of a tubular structure was described mathematically by parametric functions. A parametric finite element model was constructed to mimic the flexural response of a graded porous tubular structure using the finite element code ANSYS. With the concept of damage mechanics, an optimization procedure developed for maximizing the flexural strength and at the same time minimizing the weight was integrated with the finite element code using the ANSYS parametric design language. Using a case example, the effectiveness of the proposed technique was demonstrated. This study provides a method for designing graded porous structures and also contributes to better understanding of functionally graded porous materials.
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