Journal of Bionic Engineering ›› 2023, Vol. 20 ›› Issue (2): 495-.doi: 10.1007/s42235-022-00281-2

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The Novel Variable Stiffness Composite Systems with Characteristics of Repeatable High Load Bearing and Response Rate

Zhiwei Tuo1; Zhaohua Lin2; Qian Zhao1; Yunhong Liang1; Han Wu1; Chang Liu1; ZhiWu Han1   

  1. 1 The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China  2 School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China
  • 出版日期:2023-03-10 发布日期:2023-03-10
  • 通讯作者: Zhaohua Lin; Qian Zhao E-mail:linzhaohua@jlu.edu.cn, zhaoqian@jlu.edu.cn
  • 作者简介:Zhiwei Tuo1; Zhaohua Lin2; Qian Zhao1; Yunhong Liang1; Han Wu1; Chang Liu1; ZhiWu Han1

The Novel Variable Stiffness Composite Systems with Characteristics of Repeatable High Load Bearing and Response Rate

Zhiwei Tuo1; Zhaohua Lin2; Qian Zhao1; Yunhong Liang1; Han Wu1; Chang Liu1; ZhiWu Han1   

  1. 1 The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China  2 School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China
  • Online:2023-03-10 Published:2023-03-10
  • Contact: Zhaohua Lin; Qian Zhao E-mail:linzhaohua@jlu.edu.cn, zhaoqian@jlu.edu.cn
  • About author:Zhiwei Tuo1; Zhaohua Lin2; Qian Zhao1; Yunhong Liang1; Han Wu1; Chang Liu1; ZhiWu Han1

摘要: On the base of controllable variable stiffness property, variable stiffness composites were the main components of functional materials in aerospace. However, the relatively low mechanical strength, stiffness range, and response rate restricted the application of variable stiffness composite. In this work, the novel variable stiffness composite system with characteristics of repeatable high load bearing and response rate was successfully prepared via the double-layer anisotropic structure to solve the bottlenecks of variable stiffness composites. The novel variable stiffness composite systems were composed of variable stiffness layer of polycaprolactone (PCL) and the driven layer of silicone elastomer with alcohol, which continuously changed Young’s modulus from 0.1 to 7.263 MPa (72.63 times variation) in 200 s and maintained maximum weight of 11.52 times its own weight (8.5 g). Attributed to the relatively high variable stiffness range and load bearing value of variable stiffness composite system, the repeatable response process led to the efficient high load driven as “muscle” and diversified precise grab of objects with different shapes as “gripper”, owning widespread application prospects in the field of bionics.

关键词: Variable stiffness composite , · High strength , · Repeatable , · High load bearing , · Bionic

Abstract: On the base of controllable variable stiffness property, variable stiffness composites were the main components of functional materials in aerospace. However, the relatively low mechanical strength, stiffness range, and response rate restricted the application of variable stiffness composite. In this work, the novel variable stiffness composite system with characteristics of repeatable high load bearing and response rate was successfully prepared via the double-layer anisotropic structure to solve the bottlenecks of variable stiffness composites. The novel variable stiffness composite systems were composed of variable stiffness layer of polycaprolactone (PCL) and the driven layer of silicone elastomer with alcohol, which continuously changed Young’s modulus from 0.1 to 7.263 MPa (72.63 times variation) in 200 s and maintained maximum weight of 11.52 times its own weight (8.5 g). Attributed to the relatively high variable stiffness range and load bearing value of variable stiffness composite system, the repeatable response process led to the efficient high load driven as “muscle” and diversified precise grab of objects with different shapes as “gripper”, owning widespread application prospects in the field of bionics.

Key words: Variable stiffness composite , · High strength , · Repeatable , · High load bearing , · Bionic