摘要
为研究AA3004铝合金屈曲特性,在150、350℃退火后,制成十字型和H型板型结构;以H型样品建立有限元模型,施加5 kPa负风压,分析纯弯荷载下平面外变形,并用ANSYS软件分析非线性屈曲,计算临界屈曲载荷;十字型一侧受约束另一侧自由,H型两侧均受约束,分析两种样品的屈曲情况。结果表明:纯弯荷载下,H型无明显屈曲,符合纯弯板材变形规律,无明显变形扭转;初始缺陷越高,H型屈曲载荷受本构关系和相邻板材的约束越大。该方法计算的十字型和H型样品临界屈曲载荷最接近实际临界载荷,适用于高层建筑。
In order to study the buckling characteristics of AA3004 aluminum alloy,the cruciform and H-type alloy was madeafter annealed at 150℃and 350℃.The finite element model was established with H-type sample,and the negative windpressure of 5 kpa was applied to analyze the deformation of out-of-plane under pure bending load,and the nonlinear bucklingwas analyzed with ANSYS software to calculate the critical buckling load.One side of cruciform was restrained and the other sidewas free,and both sides of H-type were restrained.The buckling of two samples were analyzed.The results show that under purebending load,H-shaped plate shows no obvious buckling,is conformed to the deformation law of pure bending plate,and showsno obvious deformation torsion.The higher the initial defect is,the more H-shaped buckling load is affected by the constitutiverelation and the constraints of adjacent plates.The critical buckling loads of the cross and H-shaped samples calculated by thismethod are closest to the actual critical loads,which are suitable for high-rise buildings.
作者
丁晓静
DING Xiaojing(Shijiazhuang University of Applied Technology,Shijiazhuang 050081,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2020年第4期46-50,共5页
Ordnance Material Science and Engineering
基金
国家自然基金青年科学基金(51508291)。
