Mapping Algorithm to Calculate the Stress Concentration on Microporous Structure of 3D-Printed Materials
10.16156/j.1004-7220.2018.02.03
- VernacularTitle:针对3D打印材料孔洞应力集中计算的映射算法
- Author:
Huaijun YUE
1
;
Wentao JIANG
1
;
Chong WANG
2
;
Zhipeng WAN
1
;
Yubo FAN
3
Author Information
1. Department of Mechanical Science and Engineering, Sichuan University；Biomechanical Engineering Laboratory of Sichuan Province
2. Department of Mechanical Science and Engineering, Sichuan University；Key Laboratory of Mechanics and Engineering Disaster Prevention and Mitigation of Sichuan Province
3. Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University
- Publication Type:Journal Article
- Keywords:
three-dimensional (3D) printing;
micro-pore;
mapping algorithm;
finite element method;
implant
- From:
Journal of Medical Biomechanics
2018;33(2):E108-E113
- CountryChina
- Language:Chinese
-
Abstract:
Objective To obtain the distribution of stress concentration on the microporous structure of 3D-printed materials through a mapping algorithm with low calculation cost, so as to provide a new method of finite element calculation of 3D-printed materials for the prediction of fatigue life and the optimization of structural design. Methods Node coordinates and stress values within the influential region of the single pore were extracted to calculate the stress concentration coefficients of different nodes. The nearest node to each node on the ideal model was determined by distance, and the corresponding coefficient was multiplied by its stress value. When the nearest nodes of several nodes were the same, the average of these coefficients was assigned. For the pores close to the edge, an edge coefficient must be multiplied to reduce the error. Results An error of less than 8% between the mapping result and the calculation result was achieved for the case in which the pores were not near the edge, but for the case in which the pores were close to each other near the edge, the error was less than 15%. Conclusions The mapping algorithm can effectively characterize the stress concentration of the microporous structure of 3D-printed materials, and determine the stress distribution with low cost. This novel algorithm provides the finite element result for the optimization design and fatigue analysis of implants in clinical applications.
