多尺度联合仿真在复合材料注塑成型中的应用
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摘要
纤维增强材料的微观取向及分布结果是影响复合材料注塑制品宏观力学性能的关键因素。然而,结合复合材料注塑制品结构性能的传统模拟分析结果,由于没有分析由注射成型加工所引起的纤维微观取向及分布结果,其分析结果难以为产品结构优化和性能评价提供准确指导。以玻纤增强复合材料注塑成型汽车电子油门踏板为研究对象,采用基于模流分析软件Moldflow、复合材料建模平台Digimat以及结构分析软件Abaqus的多尺度联合仿真技术进行结构性能分析。结果表明,微观层面的纤维取向与分布对制品的宏观性能具有显著影响,在中间肋板与踏板连杆杆体的交汇处增加过渡圆角,能够有效地改善纤维的取向与分布,从而减少应力集中现象。
The micro-orientation and distribution of fiber-reinforced materials were the key factors that determined the macro-mechanical properties of injection-molded composite parts. However,since the micro-orientation and distribution results of the fibers caused by the injection molding process were not taken into consideration,the traditional simulation analysis results of mechanical properties of the injection-molded composite parts were difficult to provide accurate guidance for structure optimization and performance evaluation. A multi-scale co-simulation technology based on Moldflow,Digimat and Abaqus was used to analyze the structure and performance of automotive electronic throttle pedal which was injection molded with glass fiber reinforced composite. The results showed that the macroscopic properties of the product were significantly affected by the orientation and distribution of the fibers at the microscopic level,and the orientation and distribution of the fiber were effectively improved. The stress concentration was released by increasing the transition angle at the intersection of the intermediate ribs and connecting rod.
The micro-orientation and distribution of fiber-reinforced materials were the key factors that determined the macro-mechanical properties of injection-molded composite parts. However,since the micro-orientation and distribution results of the fibers caused by the injection molding process were not taken into consideration,the traditional simulation analysis results of mechanical properties of the injection-molded composite parts were difficult to provide accurate guidance for structure optimization and performance evaluation. A multi-scale co-simulation technology based on Moldflow,Digimat and Abaqus was used to analyze the structure and performance of automotive electronic throttle pedal which was injection molded with glass fiber reinforced composite. The results showed that the macroscopic properties of the product were significantly affected by the orientation and distribution of the fibers at the microscopic level,and the orientation and distribution of the fiber were effectively improved. The stress concentration was released by increasing the transition angle at the intersection of the intermediate ribs and connecting rod.
引文
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[13]高晓东,杨卫民,张金云,等.全塑轮胎浇口设计与联合仿真分析[J].橡胶工业,2018,65(3):346-350.
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[20]黄达勇,丁智平,荣继刚,等.短玻纤增强工程塑料纤维取向张量影响因素研究[J].湖南工业大学学报,2016,30(3):12-18.
[2]樊凯.纤维增强复合材料车用承载构件结构强度研究[D].株洲:湖南工业大学,2016.
[3] KRNER C,ALTENBACH H,NAUMENKO K. Coupling of a structural analysis and flow simulation for short-fiber-reinforced polymers:property prediction and transfer of results[J]. Mechanics of Composite Materials,2009,45(3):249-256.
[4] CHANG E,SHIN S,CHUNG H. Identification of controlling parameters on thermal deformation of mobile device by injection molding process[J]. Journal of Manufacturing Science and Engineering,2013,135(1):011008.
[5]林权,林铮,陈冲.应用Moldflow及ABAQUS进行注塑模结构优化设计[J].塑料,2011,40(6):106-110.
[6]佚名.利用Abaqus的Moldflow接口进行翘曲分析和残余应力分析[J].计算机与网络,2011,37(19):61.
[7] YU Y,YE J,WANG Y,et al. A mesoscale ultrasonic attenuation finite element model of composites with random-distributed voids[J].Composites Science and Technology,2013,89:44-51.
[8] YU Y,ZHANG B,TANG Z,et al. Stress transfer analysis of unidirectional composites with randomly distributed fibers using finite element method[J]. Composites Part B:Engineering,2015,69:278-285.
[9] GITMAN I M,ASKES H,SLUYS L J. Representative volume:existence and size determination[J]. Engineering Fracture Mechanics,2007,74(16):2518-2534.
[10]张东凯.碳纳米管复合材料力学性能的多尺度仿真分析[D].大连:大连理工大学,2016.
[11]代雷霆,李旭东.注塑成型工艺对汽车座椅塑料件力学性能的影响[J].塑料,2013,42(2):115-117.
[12]潘越,刘献栋,单颖春,等.长玻纤增强热塑性复合材料车轮径向载荷下的强度仿真[J].计算机辅助工程,2015,24(5):22-27.
[13]高晓东,杨卫民,张金云,等.全塑轮胎浇口设计与联合仿真分析[J].橡胶工业,2018,65(3):346-350.
[14] YOO K M,LEE S W,YOUN J R,et al. Injection molding of vertebral fixed cage implant[J]. Fibers and Polymers,2003,4(2):89-96.
[15]李照霞,韩绍峰,路丹丹,等.一种血球仪流动室系统的联合仿真研究[J].中国医疗器械杂志,2016,40(2):106-108.
[16]张靠民,上官林建,申长雨.多尺度耦合方法及其在高聚物材料加工中的应用展望[J].玻璃钢/复合材料,2007(4):45-47.
[17]杨洁,高梦鸾,李志通,等.长/短纤维增强热塑性复合材料注塑工艺模拟[J].塑料工业,2015,43(3):81-84.
[18]江青松,柳和生,熊爱华,等.长纤维增强聚合物注塑流动纤维取向分布数值模拟[J].高分子材料科学与工程,2015,31(3):123-127.
[19]王晓涛.基于有限元法的汽车电子油门踏板仿真优化研究[D].锦州:辽宁工业大学,2015.
[20]黄达勇,丁智平,荣继刚,等.短玻纤增强工程塑料纤维取向张量影响因素研究[J].湖南工业大学学报,2016,30(3):12-18.