为研究制件成型过程中的层间滑移情况及固化后的回弹变形，首先，利用自行开发的热隔膜成型装置制备了热固性树脂基复合材料C型制件。同时，针对热隔膜成型过程建立了三维数值仿真模型；该模型由3个复合材料固化过程子模型构成，包括热-化学模型、层间滑移模型和固化变形模型。然后，在此基础上将固化过程中复合材料性能的时变特性引入到仿真模型中，并将仿真结果与文献中的实验结果进行比较。最后，利用建立的仿真模型对热隔膜成型过程进行了数值模拟，并与实验进行比对，重点研究了成型过程中温度、固化度分布、层间滑移以及固化变形情况。所得结果证明所建立的数值模型对热隔膜成型过程的预测具有较高的可靠性及准确性，可以为后续热隔膜成型参数优化和模具修正提供参考。
In order to investigate the inter-ply slippage situation and spring back deformation after curing during forming process of structure,a self-designed forming process device for hot diaphragm was used to fabricate the C-shaped structure of thermosetting resin matrix composites firstly.Meanwhile,a three-dimensional numerical sim-ulation model for hot diaphragm forming process was established.The model consisted three composite curing process sub-models,including thermo-chemical model,inter-ply slippage model and curing deformation model. Then,the time-dependent characteristics for properties of composites during curing process were introduced into the simulation model on the basis,and the simulation results were compared with experimental results in reference.Fi-nally,the numerical simulation of hot diaphragm forming process was conducted using the simulation model estab-lished,and was contrasted with experiments.The temperature,distribution for degree of cure,inter-ply slippage and curing deformation situation during forming process were mainly investigated.The results obtained prove that the numerical model established has relative high reliability and precision for the prediction of diaphragm forming process,which can provide some references for the optimization of parameters and mold correction of following hot diaphragm forming process.
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