毛白杨静态压缩力学性能研究及吸能分析  

Investigation of Quasi-static Compression Mechanical Properties of Populus Tomentosa

作　　者：谢若泽[1,2] 郭玲梅 李尚昆 张斌[1,2] 钟卫洲 XIE Ruo-ze;GUO Ling-mei;LI Shang-kun;ZHANG Bin;ZHONG Wei-zhou(Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang 621900,China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900 [2]工程材料与结构冲击振动四川省重点实验室,四川绵阳621900

出　　处：《装备环境工程》2021年第5期106-112,共7页Equipment Environmental Engineering

基　　金：中国工程物理研究院创新发展基金培育项目(PY20210044)

摘　　要：目的获取毛白杨的静态压缩力学性能。方法针对含水率为14.6%,密度为0.544 g/cm3的毛白杨木材试件进行静态压缩实验,通过实验获得毛白杨顺纹、横纹径向和横纹弦向的抗压模量、准静态压缩应力-应变曲线,并对不同方向的吸能特性进行分析。结果毛白杨木材顺纹、横纹径向和横纹弦向抗压弹性模量分别为10.49 GPa、887和504 MPa;顺纹方向加载试件破坏形式表现为轴向屈曲,横纹径向为沿径向的裂纹及破坏,横纹弦向的破坏模式则为沿木纹纤维间的分离破坏。结论在相同变形(应变相等)情况下,毛白杨木材单位体积吸能沿顺纹方向压缩吸收的能量最大。在应变小于0.45情况下,横纹径向和弦向压缩吸能曲线基本重合,随着应变继续增加,横纹弦向压缩吸能略大于横纹径向压缩吸能。In order to get the quasi-static compression mechanical properties of populus tomentosa,quasi-static compression tests were proposed to the populus tomentosa specimen with a moisture content of 14.6%and a density of 0.544 g/cm3.Compression modulus and stress-strain curves along axial,radial and tangential loading directions were obtained,and the energy-absorbing were analyzed according to the test results.Experimental results show that the compression modulus of populus tomentosa under axial,radial and tangential is 10.49 GPa,887 MPa and 504 MPa,respectively.The failure modes are fiber buckling and wrinkle when loading direction is along the grain.When loading direction is along radial across the grain,the failure mode is crack along the radial direction.And the failure mode is separation between the grains when the loading direction is tangential across the grain.Energy absorption density under the axial compression is the highest at the same strain.Energy absorption curves under radial and tangential are almost the same when strain is less than 0.45, then the energy absorption undertangential is slightly higher than that of the radial orientation with the strain increasing.

关 键 词：毛白杨 准静态压缩 顺纹 横纹 吸能 

分 类 号：O347[理学—固体力学]