基于热固性树脂基复合材料帽型加筋结构制造的硅橡胶芯模预制调型孔理论建模与实验验证
发布时间:2018-05-28 00:13
本文选题:热固性树脂基复合材料 + 帽型加筋结构 ; 参考:《复合材料学报》2016年01期
【摘要】:硅橡胶芯模是实现热固性树脂基复合材料帽型加筋结构共固化成型的关键工装之一,而在预浸料固化加热过程中硅橡胶芯模的热膨胀需要通过预制适当的调型孔来消除,以保证帽型加筋结构的成型质量。首先,通过建立硅橡胶芯模预制调型孔热力耦合有限元分析模型对不同结构的硅橡胶芯模进行了计算机仿真,从而得出了实现复合材料帽型加筋结构形性协同制造的硅橡胶芯模预制调型孔最佳尺寸范围。然后,综合分析了硅橡胶芯模受热膨胀的可能影响因素,进而建立了考虑体积修正系数的预制调型孔计算模型。接着,利用有限元方法回归了芯模预制调型孔体积修正系数,并利用回归出的修正系数对不同截面尺寸的帽型结构进行了仿真验证,从而确定了较为准确的预制调型孔理论计算模型。最后,通过实验验证了该数学模型及有限元分析方法的正确性,为制造复合材料帽型加筋结构提供了理论与实验依据。
[Abstract]:Silicone rubber core mould is one of the key tools to realize the cocuring forming of the cap reinforced structure of thermosetting resin matrix composites. However, the thermal expansion of the silicone rubber core mold needs to be eliminated by prefabrication and proper adjusting hole during the curing heating process of prepreg. In order to ensure the forming quality of cap reinforced structure. Firstly, the computer simulation of silicone rubber core die with different structure is carried out by establishing the thermo-mechanical coupling finite element analysis model of the prefabricated mold. Thus, the optimum size range of the prefabricated adjusting hole of the silicone rubber core die is obtained, which can realize the joint manufacture of the reinforced structure of the cap type of composite material. Then, the influence factors of thermal expansion of silicone rubber core die are analyzed, and the calculation model of prefabricated adjusting hole considering volume correction coefficient is established. Then, the volume correction coefficient of the core die is regressed by the finite element method, and the cap structure with different cross section size is simulated and verified by the regression correction coefficient. Thus, a more accurate theoretical calculation model of prefabricated adjustable holes is established. Finally, the correctness of the mathematical model and the finite element analysis method are verified by experiments, which provides the theoretical and experimental basis for the fabrication of composite cap reinforced structures.
【作者单位】: 中南大学机电工程学院;中南大学轻合金研究院;宁波大学机械工程与力学学院;
【基金】:“973”计划(2014CB046502) 中国博士后基金(2014M562127) 湖南省博士后专项基金(2014RS4031) 国家重点实验室开放基金(Kfkt2013-04)
【分类号】:TB33
【相似文献】
相关期刊论文 前1条
1 石庆华;戴棣;曹正华;;复合材料加筋结构界面层间应力分析建模[J];材料科学与工程学报;2009年05期
,本文编号:1944399
本文链接:https://www.wllwen.com/kejilunwen/cailiaohuaxuelunwen/1944399.html