复合材料热压罐成型模具结构参数对温度场的影响  

Influence of Structural Parameters of Composite Autoclave Molding Mold on Temperature Field

作　　者：刘洋[1] 马贵春[1] 张化斌 王磊[1] 郭思博 LIU Yang;MA Guichun;ZHANG Huabin;WANG Lei;GUO Sibo(School of Aerospace Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学航空宇航学院,山西太原030051

出　　处：《中北大学学报（自然科学版）》2024年第5期583-591,共9页Journal of North University of China(Natural Science Edition)

摘　　要：固化过程中热压罐内温度场分布的均匀性对于复合材料的结构性能、强度等方面具有重要影响。本文以目前航天制造业中广泛使用的用于制作复杂大型结构件的框架式模具作为研究对象,在COMSOL中建立了热压罐框架式模具在固化过程中的非定常三维温度场,研究了模具的不同筋板厚度和通风孔尺寸的情况以及型面下方半圆形散热孔存在与否的情况对模具型面温度场均匀性的影响。对比支撑筋板厚度分别为10,8,6和4 mm模具的温度标准差曲线发现:减小支撑筋板厚度可增加型面温度场均匀性,但模具整体稳定性随着筋板厚度变薄而迅速降低,更易发生受压失稳现象;对比纵向通风孔尺寸为130 mm×220 mm、150 mm×220 mm、170 mm×220 mm和190 mm×220 mm模具的温度标准差曲线发现:适当加宽筋板通风孔尺寸可提高型面温度场的均匀性,但宽度170 mm与190 mm的曲线基本重合,影响已不明显;同样型面下方散热孔的存在可以提高型面温度场的均匀性。The uniformity of the temperature field distribution in the autoclave during the curing process has an important impact on the structural performance and strength of composite materials.This paper took the frame molds that were widely used in the aerospace manufacturing industry to produce complex large structural parts as the research object.In COMSOL,the unsteady three-dimensional temperature field of the autoclave frame molds during the curing process was established.On the mold conditions of different ribs thickness,ventilation hole size,and existence of heat dissipation holes,the influence of the temperature field uniformity on the mold surface was studied.By comparing the temperature standard deviation curves of molds with support rib thicknesses of 10 mm,8 mm,6 mm,and 4 mm,it is found that reducing the thickness of the support ribs can increase the uniformity of the temperature field on the profile,but the overall stability of the mold becomes thinner with the thickness of the ribs decreases rapidly.If it decreases rapidly,pressure instability is more likely to occur.Comparing the mold temperature standard deviation curves with longitudinal ventilation hole sizes of 130 mm×220 mm,150 mm×220 mm,170 mm×220 mm and 190 mm×220 mm,it is found that:appropriately widening the ribbed ventilation hole size can increase temperature field uniformity on the profile,but the curves with widths of 170 mm and 190mm basically overlap,so the impact is no longer obvious;similarly,the existence of heat dissipation holes can indeed increase the uniformity of the temperature field on the profile.

关 键 词：热压罐成型 模具 复合材料 温度场 

分 类 号：V261.97[航空宇航科学与技术—航空宇航制造工程]