Compressive Mechanical Properties of Larch Wood in Different Grain Orientations
As a green and low-carbon natural polymer material, wood has always been popular in engineering applications owing to its excellent physical and mechanical properties. In this study, compression tests in conjunction with in situ test methods (DIC method) were used to investigate the compression mech...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/18/3771 |
| _version_ | 1797483372405063680 |
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| author | Jingcheng Sun Rongjun Zhao Yong Zhong Yongping Chen |
| author_facet | Jingcheng Sun Rongjun Zhao Yong Zhong Yongping Chen |
| author_sort | Jingcheng Sun |
| collection | DOAJ |
| description | As a green and low-carbon natural polymer material, wood has always been popular in engineering applications owing to its excellent physical and mechanical properties. In this study, compression tests in conjunction with in situ test methods (DIC method) were used to investigate the compression mechanism of wood samples in the longitudinal, radial, and tangential directions. The macroscopic failure modes, energy dissipation results, and variations in the strain field were analyzed. The results showed that the load–displacement curve in each grain orientation included three stages: an elasticity stage, yield stage, and strengthening stage. Both the compressive strength and elastic modulus in the longitudinal direction were significantly higher than those in the radial and tangential directions, but there was no significant difference between the radial and tangential directions. Specimens in the longitudinal direction mainly presented fiber buckling, fiber shear slippage, and fiber fracture failure; in radial directions mainly presented compression compaction of the fiber cells; and in the tangential directions presented buckling and shear failure of the laminar layers. The energy absorption in the longitudinal direction was better than in the other directions. The strain changed significantly in the loading direction in the elastic stage while the shear strain changed remarkably in the yield stage in each grain orientation. In this paper, the compression mechanical properties of larch wood in different grain orientations were studied to provide a reference for its safe application in engineering. |
| first_indexed | 2024-03-09T22:46:01Z |
| format | Article |
| id | doaj.art-fa31f1c556d6420186ebfaefc3c19eb6 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T22:46:01Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-fa31f1c556d6420186ebfaefc3c19eb62023-11-23T18:29:37ZengMDPI AGPolymers2073-43602022-09-011418377110.3390/polym14183771Compressive Mechanical Properties of Larch Wood in Different Grain OrientationsJingcheng Sun0Rongjun Zhao1Yong Zhong2Yongping Chen3Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, ChinaInstitute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, ChinaInstitute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, ChinaInstitute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, ChinaAs a green and low-carbon natural polymer material, wood has always been popular in engineering applications owing to its excellent physical and mechanical properties. In this study, compression tests in conjunction with in situ test methods (DIC method) were used to investigate the compression mechanism of wood samples in the longitudinal, radial, and tangential directions. The macroscopic failure modes, energy dissipation results, and variations in the strain field were analyzed. The results showed that the load–displacement curve in each grain orientation included three stages: an elasticity stage, yield stage, and strengthening stage. Both the compressive strength and elastic modulus in the longitudinal direction were significantly higher than those in the radial and tangential directions, but there was no significant difference between the radial and tangential directions. Specimens in the longitudinal direction mainly presented fiber buckling, fiber shear slippage, and fiber fracture failure; in radial directions mainly presented compression compaction of the fiber cells; and in the tangential directions presented buckling and shear failure of the laminar layers. The energy absorption in the longitudinal direction was better than in the other directions. The strain changed significantly in the loading direction in the elastic stage while the shear strain changed remarkably in the yield stage in each grain orientation. In this paper, the compression mechanical properties of larch wood in different grain orientations were studied to provide a reference for its safe application in engineering.https://www.mdpi.com/2073-4360/14/18/3771compressive failure mechanismlarch wooddigital image correlation method (DIC)load–displacement curveenergy dissipation |
| spellingShingle | Jingcheng Sun Rongjun Zhao Yong Zhong Yongping Chen Compressive Mechanical Properties of Larch Wood in Different Grain Orientations Polymers compressive failure mechanism larch wood digital image correlation method (DIC) load–displacement curve energy dissipation |
| title | Compressive Mechanical Properties of Larch Wood in Different Grain Orientations |
| title_full | Compressive Mechanical Properties of Larch Wood in Different Grain Orientations |
| title_fullStr | Compressive Mechanical Properties of Larch Wood in Different Grain Orientations |
| title_full_unstemmed | Compressive Mechanical Properties of Larch Wood in Different Grain Orientations |
| title_short | Compressive Mechanical Properties of Larch Wood in Different Grain Orientations |
| title_sort | compressive mechanical properties of larch wood in different grain orientations |
| topic | compressive failure mechanism larch wood digital image correlation method (DIC) load–displacement curve energy dissipation |
| url | https://www.mdpi.com/2073-4360/14/18/3771 |
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