摘要
对铝蜂窝在压-剪组合荷载作用下的变形特征进行试验研究,并基于试验建立铝蜂窝数值计算模型,分析各参数对铝蜂窝在压-剪组合荷载作用下力学行为的影响。结果表明:在TL面内加载时,蜂窝变形逐渐由只在一端(加载端)变形过渡到同时在两端(加载端和非加载端)变形。在TW面加载时,蜂窝主要在一端(加载端)产生变形,并且更容易出现脱胶破坏;蜂窝峰值荷载、平均荷载以及比能与l/t值呈负相关关系。l/t值相同时,单元边长l、单元壁厚t越小,则蜂窝平均荷载和比能越大。单元边长l对蜂窝平均荷载的影响要大于单元壁厚t对平均荷载的影响;增大蜂窝高度会降低结构吸能效率。
The deformation characteristics of aluminum honeycomb under combined compression-shear loads were studied by an experiment.Numerical models of aluminum honeycomb were established based on the experiment to analyze the influence of parameters for the mechanical behaviors of aluminum honeycomb under combined compression-shear loads.The results show that the deformation of aluminum honeycomb gradually changes from one end(loading end)to two ends(loading end and non-loading end)when it was loaded at a TL plane.When it was loaded at TW plane,the deformation of honeycomb occured at one end(loading end),and the debondings were more likely to occur during the loading process.The peak load,average load,and specific energy of honeycomb are negatively correlated with the value of l/t under combined compression-shear loads.If the values of l/t of honeycombs are the same,the smaller the length l and the wall thickness t are,the larger the average load and specific energy of the honeycomb are.The change of length l has greater effects on the average load of honeycomb than the change of wall thickness t.Increasing the height of honeycomb will reduce the energy absorption efficiency.
作者
杨辉
刘亚红
侯秀慧
尹冠生
YANG Hui;LIU Yahong;HOU Xiuhui;YIN Guansheng(College of Science,Chang’an University,Xi’an 710064,China;School of Mechanics,Civil Engineering and Architect,Northwestern Polytechnical University,Xi’an 710072,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第12期121-128,共8页
Journal of Vibration and Shock
基金
国家自然科学基金青年科学基金(11402035)。
关键词
铝蜂窝
组合荷载
数值分析
力学响应
aluminum honeycomb
combined loads
numerical analysis
mechanical response
