基于混合网格方法的VARTM工艺充模仿真与实验验证  

Simulation and experimental validation for the mold-filling process of VARTM based on mixed grid approach

作　　者：杨波[1] 王时龙[1] 毕凤阳[2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]黑龙江工程学院机电工程学院,哈尔滨150001

出　　处：《复合材料学报》2017年第8期1736-1744,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51605057);重庆市基础与前沿研究计划(cstc2016jcyjA0456);中国博士后科学基金(2016M600721);黑龙江省自然科学基金(E2015027)

摘　　要：针对VARTM工艺的特点,建立了充模过程树脂流动和预成型体变形行为数学模型。提出了基于混合网格方法的VARTM充模仿真算法,在该算法中,模具型腔几何模型进行二维或三维网格划分,在每个真空袋表面单元上增加一个一维附属单元,用于在仿真过程中实时地吸收或挤出因真空袋变形而产生的局部树脂体积变化,形成混合网格仿真模型;求解过程中,对树脂流动和预成型体变形分别进行求解后,基于上述混合网格模型进行两者耦合操作,实现了仿真精度和速度的统一。搭建了VARTM充模实验平台,进行了一维充模实验,通过仿真结果与实验测量结果对比,验证了本文算法的正确性。最后,通过三维仿真算例,验证了算法对三维复杂结构和顺序浇口策略仿真的可行性。According to the characteristics of VARTM,the mathematical models of resin flow and preform deformation during the mold filling process were built.A mold filling simulation algorithm based on mixed grid approach was proposed.In this approach,the geometry model of the mould cavity was meshed by 2D or 3D grid,and then a 1D affiliate element was added on each surface element of the vacuum bag to absorb or extrude some resin in real time cased by the vacuum bag deformation,so the mixed grid simulation model was established,During the simulation,resin flow and preform deformation were solved separately,then they were coupled using the above-mentioned mixed grid simulation model,the unity of simulation precision and velocity was achieved.A mold filling experimental platform for VARTM was built and a 1D mold filling experiment was implemented,according to the comparison between simulation and experiment results,the validity of the algorithm was verified.At last,the feasibility of the above-mentioned algorithm on 3D complex structure and sequential injection strategy was validated by 3D simulation example.

关 键 词：真空辅助树脂传递成型 充模过程 混合网格 数值模拟 实验验证 

分 类 号：TB332[一般工业技术—材料科学与工程]