Bio-Inspired Semi-Active Safeguarding Design with Enhanced Impact Resistance via Shape Memory Effect

Wenhui Wang; Sheng Wang; Jianyu ZhouHuaxia DengShuaishuai SunTian XueYuqian MaXinglong Gong

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Bio-Inspired Semi-Active Safeguarding Design with Enhanced Impact Resistance via Shape Memory Effect

机译：Bio-Inspired Semi-Active Safeguarding Design with Enhanced Impact Resistance via Shape Memory Effect

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Inspired by creatures reducing impact damage, a novel semi-active protectionstrategy to enhance impact resistance through structural adjustment isproposed. The heat-activated shape memory composites (PCLE) consistingof polycaprolactone (PCL) and shear stiffening elastomer are first prepared.The PCLE with 50 wt. PCL (PCLE-50) presents tensile strengthof 0.46 MPa, fracture strain of 148, high shape fixity and recovery rates(97.9 and 91.1), and stable shape-memory repeatability. Furthermore,various PCLE-50-based structures are fabricated, which show reinforcedanti-impact performance after shape-shifting. Loading from 300 mm, themaximum drop hammer impact force of no protection, PCLE-50, anddeformed assembled single-branch structure are 3.98 kN, 1.75 kN, and0.93 kN, respectively. Additionally, assembled complex structures also exhibitexceptional energy absorption properties. Ultimately, intelligent clothing issuccessfully manufactured. Besides good anti-impact effect, the clothingshows excellent thermal insulation capabilities whose surface temperatureis 31.7 ℃ after heating for 600 s at 42 ℃. This study provides an innovativemeans to develop deformable, wearable, and intelligent protective devices.

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来源
《Advanced functional materials》 |2023年第13期|2212093.1-2212093.11|共11页
作者
Wenhui Wang; Sheng Wang; Jianyu ZhouHuaxia DengShuaishuai SunTian XueYuqian MaXinglong Gong;
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作者单位

CAS Key Laboratory of Mechanical Behavior and Design of MaterialsDepartment of Modern MechanicsUniversity of Science and Technology of ChinaHefei, Anhui 230027, P. R. China;

CAS Key Laboratory of Mechanical Behavior and Design of MaterialsDepartment of Precision Machinery and InstrumentationUniversity of Science and Technology of ChinaHefei, Anhui 230027, P. R. China;

School of Life SciencesDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei, Anhui 230026, P. R. China;

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正文语种英语
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关键词
heat insulation; impact resistance; shape memory; shear stiffening composites;

Bio-Inspired Semi-Active Safeguarding Design with Enhanced Impact Resistance via Shape Memory Effect

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