Effects of Poissons Ratio of Tension-Only Material on Optimal Stiffness Design
For topology optimization of a structure with tension-only material, the effects of the Poissons ratio of material on the final structural topologies are investigated. To simulate the topology optimization of a structure with tensiononly material, the material-replacement method is presented. In the method the original tension-only material is replaced with a new isotropic material with the same modulus and Poissons ratio to simplify the structural analysis. When the original material is replaced with isotropic material, only approximate displacement field can be obtained. To decrease the error between the actual displacement field of the structure with original material and the current displacement field of the structure with isotropic material, the local effective stiffness of a material point is modified according to the local strain and stress. To find the effects of the Poissons ratio of the new isotropic material on the final material distribution, in an example, the Poissons ratio of the isotropic material is specified to be zero in optimization. Numerical results show the structural topologies are different and the final topology of structure with zero-Poissons ratio material is more reasonable.
topology optimization tension-only materialreplacement method poisson s ratio
J.Shi Z.Z.Wang
Res.Center of Water Engrg.Safety & Disaster Prev., Northwest A&F University, Yangling, Shaanxi, 712100, China
国际会议
太原
英文
1-4
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）