| Title |
Numerical analysis of metal forming process / |
| Translation of Title |
Metalų formavimo procesų skaitinė analizė. |
| Authors |
Narasimhamurthy, Kishan |
| Full Text |
|
| Pages |
62 |
| Keywords [eng] |
forming limited diagram (FLD) curves ; cupping test ; tension test ; finite element method |
| Abstract [eng] |
In this work are presented the comparison analysis of different material models suitability to simulate metal forming processes. Chosen material is the mid strength and plastic steel from automotive body. Experimentally defined mechanical properties of material were approximated using three different material models from Finite element program LS-Dyna. For simulation of metal forming processes important is Forming limit diagram FLD criteria, which usually is obtained from complex form geometry and using noncontact strain measurement system. In this work the physical determination of FLD curve is replaced by numerical experiments. The FLD curve is determined using the FE simulation in LS-Dyna and compared with FLD from empirical formulas. Good coincidence of results showed that having proper tension curve of material, it is possible to simulate the FLD curve. This curve is commonly used in the metal forming processes for the evaluation of state of deformed material. The comparison of physical cupping test and numerical simulation are presented also. Using FLD criteria the different states of the material are obtained and visually compared with the experiments. Also the influence of separate parameters to the behavior of material during the metal forming process are evaluated. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Master thesis |
| Language |
English |
| Publication date |
2016 |
