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| Investigation of Quasi-static Compression Mechanical Properties of Populus Tomentosa |
| Received:March 30, 2021 Revised:April 14, 2021 |
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| DOI：10.7643/issn.1672-9242.2021.05.016 |
| KeyWord:populus tomentosa quasi-static compression parallel to grain perpendicular to grain energy-absorbing |
| Author | Institution |
| XIE Ruo-ze |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
| GUO Ling-mei |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
| LI Shang-kun |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
| ZHANG Bin |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
| ZHONG Wei-zhou |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China;Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang , China |
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| Abstract: |
| 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 under tangential is slightly higher than that of the radial orientation with the strain increasing. |
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