| The in-depth contents |
| Publication year |
1994 |
| PDF |
Download |
| Title |
AN EVALUATION METHOD ON THE MATERIAL NONLINEARITY IN THE ANALYSIS OF MEMBRANE STRUCTURES |
| Author |
Yosihiko HlNO,Kazuo ISHII
|
| Summary |
The stress and strain analysis of membrane structures is usually made based on the presumption of material linearity and geometry nonlinearity because of the application suitability and the difficulties in analysis. But the real membrane materials possess strong material nonlinearities，the analysis not considering this characteristics has the possibility of yielding large errors. Thus it is necessary to consider both material nonlinearity and geometry nonlinearity in order to make stress and strain analysis that is in accordance with the real situation. Based on the presumption of geometry nonlinearity， this paper in advance defined several kinds of material property constants，by taking them in according to the different levels of stresses occurred，the simulation of material nonlinearity was tried. During the analysis the evaluation method of 2-axisstress was a problem to be solved. To solve this problem，the author proposed a new evaluation method of membrane stresses by taking in the concept of effective stress that has something to do with the yielding condition of plastic body. In the meanwhile of discussing the suitability of the evaluation method，the problems and points to be taken care of in applying this method are also shown in this paper.
|