An improved 8-node nonlinear solid element for thin-walled structures analysis | |
| Author | Liu, Guangzhao |
| Call Number | AIT Thesis no.ST-03-25 |
| Subject(s) | Thin-walled structures Nonlinear functional analysis |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-03-25 |
| Abstract | Recently solid element has become used widely because of its super properties due to its less DOFs compared with degenerated shell element. However, it also encounters two main problems in application: (1) The solution convergence tends to be extremely slow in linear analysis and it fails to show the behavior of non-linear analysis. (2) There are several severe locking problems. In this study, two kinds of 8-node hexahedral element are presented for the analysis of thin-walled structures. The formulations are based on the virtual displacement variational principle. Both Enhanced Assumed Strain (EAS) method and Assumed Natural Strain (ANS) method are implemented to release locking effects. Improved strain transformation matrices are introduced. Both full and reduced Gauss integration schemes are presented, with a good approximation for the geometric stiffness matrix. A great number of numerical tests carried out for the validation of present 8-node solid element are in good agreement with references. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-03-25 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Kim, Kidu; |
| Examination Committee(s) | Worsak Kanok-Nukulchai;Pichai; |
| Scholarship Donor(s) | The King's Scholarship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2003 |