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| Thermal buckling analysis of composite laminated Mindlin plate founded in the new modified couple stress theory |
| Received:October 27, 2018 Revised:December 18, 2018 |
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| DOI：10.7511/jslx20181027001 |
| KeyWord:new modified couple stress theory Mindlin laminate plate thermal stability governing equations length scale parameter |
| Author | Institution |
| 张大千 |
沈阳航空航天大学 航空宇航学院, 沈阳 |
| 王良秀 |
沈阳航空航天大学 航空宇航学院, 沈阳 |
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| Abstract: |
| Based on the new modified couple stress theory,a thermal stability model for Mindlin laminated plates under the interaction between mechanical and thermal loads is proposed for the first time.The model introduces only one material-scale parameter and through the principle of virtual work obtains the stability equations and boundary conditions.Using a simply supported square plate as an example,its analytical solution is obtained by using Navier's method.The results show that the scale effect can be captured by the model.The critical buckling critical temperature goes up when the material scale parameter increases;when the span-thickness ratio increases,the critical temperature decreases;with the increase of the plate geometry parameter,the model will degenerate into a macroscopic model;when the temperature change is lager,the critical buckling load under thermal load becames lager and the scale effect became more obvious. |