非热压罐工艺模具对复合材料加筋壁板固化变形影响的有限元分析

FEM analysis of the mold influence on curing deformation of stiffened composite panel in the out-of-autoclave process

通过真空袋成型工艺,利用CYCOM 5320-1材料体系制备了碳纤维/树脂基复合材料T型加筋壁板,并应用激光跟踪仪测量了其固化变形量。针对考虑模具影响和不考虑模具影响两种情况,利用有限元方法模拟了该加筋壁板固化过程。结果表明:数值模拟固化变形趋势和实验结果趋势相同,在宽度方向上吻合较好。考虑模具因素比未考虑模具因素的模拟结果更接近真实变形值,这是由于复合材料在达到树脂凝胶点之前,模具受热挤压模腔,导致构件产生永久性变形造成的。

By using vacuum bag molding process,T-shaped stiffened carbon fiber reinforced resin composite panel was prepared with CYCOM 5320-1 prepreg.Then the curing deformation was measured by laser tracer.The simulation of curing process of the panel with and without mold considered was launched by finite element method.The results of the simulation show that the simulation and test have the same deformation tendency,and the deformation fits well along the width direction.It is more close to the true values when considering the mold factor.It is because that before resin reaches gel point,the mold is heated and squeezes die cavity,which causes permanent deformation of the component.