Thermal Expansion/Bending Fimite Element Analysis Of Composite Laminated/Sandwich Structures

The finite element theory of thermal stress and thermal deformation of composite laminates and laminated plates is presented in this paper.The thermal expansion and thermal bending of composite laminates/laminated plates were analyzed theoretically.The finite element theory of temperature field and thermal stress thermal deformation of laminates is derived.On the basis of this theory,the finite element software ABAQUS is used to simulate the thermal expansion/thermal bending of the composite three laminate and the sandwich plate.In the simulation process,solid elements and shell elements are used to build models respectively.Compared with the simulation results with the exact solutions,it is found that the simulation results of solid units are closer to the exact solutions.It is shown that the solid element is suitable for the calculation of thermal expansion and thermal bending of composite laminates/laminated plates.Based on the above conclusions,ABAQUS modeling for composite laminates and sandwich panels with different span thickness ratios is modeled by using two models.The modeling is completed enough to simulate the thermal expansion and thermal bending problems of composite laminates and sandwich panels.The simulation results are compared with the exact solutions,indicating that the solid element is suitable for calculating the thermal expansion and thermal bending problems of composite laminates/sandwich panels.Finally,it is concluded that both the thick plate and the thin plate are more accurate when using the ABAQUS to calculate the thermal expansion and thermal bending problems.It is of guiding significance for the future practical engineering problems.