| COMPUTATION OF FLEXURAL PROPERTIES OF HA/PLLA COMPOSITE USING A CELL MODEL APPROACH |
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| 作者姓名： | Fan Jianping Tang Chak-Yin Tsui C.P. |
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| 作者单位： | Department of Industrial and Systems Engineering，Department of Industrial and Systems Engineering The Hong Kong Polytechnic University，Hong Kong，China，The Hong Kong Polytechnic University，Hong Kong，China |
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| 基金项目： | 香港理工大学校科研和教改项目 |
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| 摘 要： | A three-dimensional finite element analysis was conducted to evaluate the feasibility of predicting the flexural properties of hydroxyapatite-reinforced poly-L-lactide acid (HA/PLLA) biocomposite using three different schemes. The scheme 1, originated from a beam analysis, was used to determine the flexural modulus analytically while the scheme 2 and 3 were designed to have different loading and boundary conditions using a finite element cell modeling approach. An empirical approach using Chow's formula and experimental data were used for comparison with the predicted results. In order to reduce the computational time and save the storage space involved in determining the effect of varying particle volume fractions on the flexural properties of HA/PLLA, a superelement technique was applied. The results using the scheme 3 and the Chow's formula were found to be in reasonable agreement with experimental results over the range of particle volume fraction. In addition to the Chow's formula, local stress distribution and the failure processes in HA/PLLA were simulated using the finite element technique.
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| 关 键 词： | 复合材料 羟磷灰石 HA PLLA 有限元法 细胞模型 曲折性 |
| 收稿时间： | 2004-12-16 |
| 修稿时间： | 2005-11-30 |
COMPUTATION OF FLEXURAL PROPERTIES OF HA/PLLA COMPOSITE USING A CELL MODEL APPROACH |
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| Fan Jianping Tang Chak-Yin Tsui C.P..COMPUTATION OF FLEXURAL PROPERTIES OF HA/PLLA COMPOSITE USING A CELL MODEL APPROACH[J].Acta Mechanica Solida Sinica,2006,19(1):18-25. |
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| Authors: | Fan Jianping Tang Chak-Yin Tsui CP |
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| Institution: | 1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;2. Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China;1. DIA - Department of Engineering and Architecture, University of Trieste, Via Alfonso Valerio 6, Trieste, 34127, Italy;2. ESA-ESTEC, Keplerlaan 1, 2200 AG, Noordwijk, ZH, the Netherlands;1. State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;1. Department of Neurosurgery, University of California, Los Angeles (UCLA), Los Angeles, CA, United States;2. Department of Pathology and Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, United States;1. Institute of Chemical Machinery and Process Equipment, Zhejiang University, Hangzhou 310027, China;2. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | A three-dimensional finite element analysis was conducted to evaluate the feasibility of predicting the flexural properties of hydroxyapatite-reinforced poly-L-lactide acid (HA/PLLA) biocomposite using three different schemes. The scheme 1, originated from a beam analysis, was used to determine the flexural modulus analytically while the scheme 2 and 3 were designed to have different loading and boundary conditions using a finite element cell modeling approach. An empirical approach using Chow's formula and experimental data were used for comparison with the predicted results. In order to reduce the computational time and save the storage space involved in determining the effect of varying particle volume fractions on the flexural properties of HA/PLLA, a superelement technique was applied. The results using the scheme 3 and the Chow's formula were found to be in reasonable agreement with experimental results over the range of particle volume fraction. In addition to the Chow's formula, local stress distribution and the failure processes in HA/PLLA were simulated using the finite element technique. |
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| Keywords: | composite hydroxyapatite (HA) poly-L-lactide acid (PLLA) finite element method (FEM) cell model flexural properties particle volume fraction (PVF) |
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