Stretching behaviors of entangled materials with spiral wire structure |
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| Affiliation: | 1. School of Materials Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea;2. Department of Environmental Engineering, Kyungpook National University, Daegu 41566, Republic of Korea;3. School of Architecture, Kyungpook National University, Daegu 41566, Republic of Korea;4. Department of Mechanical Engineering, Hanyang University, Ansan 15588, Republic of Korea;1. Manufacture Française des Pneumatiques MICHELIN, BP 63040, Clermont-Ferrand Cedex 9, France;2. ICB, UMR 6303 CNRS, Université Bourgogne Franche-Comté, BP 47870, 21078, Dijon Cedex, France;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China;3. Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo ON N2L 3G1, Canada;1. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China;2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China |
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| Abstract: | The entangled materials with spiral wire structure have been investigated in terms of the stretching behavior, mechanical properties, and stress–strain hysteresis effect. The results indicate that these materials are much more flexible than that with non-woven wire structure. They exhibit 1.05 MPa yielding strength and 5.7 MPa Young’s modulus in average at the porosity of 60%, and 2.47 MPa yielding strength and 12.3 MPa Young’s modulus in average at the porosity of 45%. Under tensile loading the materials exhibit a unique stress–strain behavior that goes through a long strain period after yielding and follows a quick stress increase on the stress–strain curve due to the ‘unclosing’ and ‘straightening’ mechanism of the spiral wire structure. In addition, these materials exhibit obvious stress–strain hysteresis effect. Their energy dissipation values determined according to the stress–strain hysteresis loops are 28.6 mJ/cm3 at the porosity of 60% and 102.3 mJ/cm3 at the porosity of 45%, which are much larger than that of the polymer foam, implying their promising applications for the energy absorption. |
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