Abstract
The purpose of this study is to predict the plastic limit and the shakedown state of orthotropic materials and structures. The Hill yield criterion is used in Melan's theory with the finite element method and large scale nonlinear programing combined to form a model to predict the plastic limit and the shakedown state of complex 3D structures made from multi-orthotropic materials. Several numerical examples are given to verify the accuracy, universality and efficiency of this method. The applicability of using shakedown theory to plastic analyses is extended in this work. This method can be used to design and assess structures made from orthotropic composites in engineering practice.
| Translated title of the contribution | Lower bound analysis of plastic limit and shakedown state of orthotropic materials |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 966-971 |
| Number of pages | 6 |
| Journal | Qinghua Daxue Xuebao/Journal of Tsinghua University |
| Volume | 58 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1 Nov 2018 |
Keywords
- Conic quadratic optimization
- Hill yield criterion
- Lower bound analysis
- Orthotropic material
- Plastic limit
- Shakedown state