Tensile Behavior and Failure Mechanism of Bamboo Fiber Bundle and Its Scrimber Under Different Strain Rates

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Abstract
In this study, bamboo fiber bundles were directly extracted from raw bamboo material to fabricate reconstituted bamboo using the traditional hot-pressing method. The tensile behaviors and failure mechanisms of both the bamboo fiber bundle and its bamboo scrimber under various strain rates (quasi-static, 350/s, 950/s and 1700/s) were investigated by the SHTB system (split-Hopkinson tensile bar, high-speed camera and digital image correlation method). The results showed that the bamboo scrimber exhibited an obvious positive strain rate effect. The ultimate tensile strength of the bamboo scrimber at a strain rate of 1700/s was close to 200 MPa, but it was only about 80 MPa under quasi-static loading. This experimental result was further validated by the tensile behaviors of single bamboo fiber bundles at different strain rates (quasi-static, 300/s, 700/s and 1500/s). In addition, as the strain rate increased, the fracture surface of the bamboo changed from a linear shape to a discontinuous folded shape.
Funding Information
  • Jiangsu Education Department (22KJB130012, H202313, L202308, K202434, 24KJA2220003, 23KJA560007, 2023 No. 4 Item 9, 2022XRC087)
  • Suqian Science and Technology Program (22KJB130012, H202313, L202308, K202434, 24KJA2220003, 23KJA560007, 2023 No. 4 Item 9, 2022XRC087)
  • Major Project of Basic Science (Natural Science) (22KJB130012, H202313, L202308, K202434, 24KJA2220003, 23KJA560007, 2023 No. 4 Item 9, 2022XRC087)
  • Research in Higher Education Institutions in Jiangsu Province (22KJB130012, H202313, L202308, K202434, 24KJA2220003, 23KJA560007, 2023 No. 4 Item 9, 2022XRC087)
  • natural science research project of Jiangsu Province higher education institutions (22KJB130012, H202313, L202308, K202434, 24KJA2220003, 23KJA560007, 2023 No. 4 Item 9, 2022XRC087)
  • Jiangsu Civil Architecture Society project (22KJB130012, H202313, L202308, K202434, 24KJA2220003, 23KJA560007, 2023 No. 4 Item 9, 2022XRC087)
  • Suqian University Talent Introduction Research Startup Fund (22KJB130012, H202313, L202308, K202434, 24KJA2220003, 23KJA560007, 2023 No. 4 Item 9, 2022XRC087)

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