摘要
采用有限元对粘结连接和螺铨连接的复材/金属混合结构加筋板进行了数值模拟,分析了混合结构加筋板在不同温度、不同约束方式下的剪切、压缩屈曲及后屈曲性能。结果表明:温度环境下,夹具的厚度、与试件连接形式都对壁板屈曲失稳载荷有影响。通过不同组别的分析优化,可以得到比较理想的夹具及连接形式,即夹板厚度为6mm,螺栓连接;同时热胀系数接近壁板试件的边界约束可作为温度环境下混合结构壁板剪切稳定性试验边界条件较优的设计形式;壁板压缩情况下,侧边固支加筋板失稳载荷比侧边简支加筋板高5.6%,但侧边固支与简支加筋板的破坏载荷基本相同。
In this paper, the finite element method is used to simulate the composite and metal mixed structure stiffened plates with bonded joints and screw joints. The shearing, compression buckling and post-buckling of the mixed structure stiffened plates at different temperatures and different restraint modes are analyzed. Results show that the thickness of the fixture and the connection form of the specimen has an influence on the buckling instability load of the wall. The analysis and optimization of different groups can obtain the ideal fixture and connection form. The thickness of the splint is 6 mm, bolted, and the thermal expansion coefficient is close to the boundary constraint of the wall specimen. It can be used as a design method for the boundary condition of the shear stability test of the mixed structural panel under temperature environment. In the case of siding compression, the unstable load of the side-supported stiffened plates is 5.6% higher than that of the simple supported stiffened plates on the side, but the lateral fixed supports are basically the same as the simply supported stiffened plates.
作者
邓文亮
成竹
吴敬涛
陈宏
Deng Wenliang;Cheng Zhu;Wu Jingtao;Chen Hong(Aircraft Strength Research Institute of China,710065,Xi’an,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2020年第4期1798-1804,I0029,共8页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(11602237)。
关键词
复材加筋板
温度场
约束方式
屈曲
composite material stiffened plate
temperature field
restraint mode
buckling
