Test for the deep:magnetic loading characterization of elastomers under extreme hydrostatic pressures  

作　　者：Yukai Zhao Chengqian Zhang Xuxu Yang Xunuo Cao Tao Feng Fanghao Zhou Xuanqi Wang Peng Zhao Tiefeng Li 

机构地区：[1]Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,People’s Republic of China [2]Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province,Zhejiang University,Hangzhou 310027,People’s Republic of China [3]Center for X-Mechanics,Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,People’s Republic of China [4]State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310028,People’s Republic of China

出　　处：《International Journal of Extreme Manufacturing》2024年第5期311-322,共12页极端制造（英文）

基　　金：supported in part by the National Natural Science Foundation of China(52205424);in part by National Natural Science Foundation of China(T2125009,92048302);in part by Laoshan laboratory(Grant No.LSKJ202205300);in part by‘Pioneer’R&D Program of Zhejiang(Grant No.2023C03007);in part by the Zhejiang Provincial Natural Science Foundation of China(LY23A020001).

摘　　要：Soft robot incarnates its unique advantages in deep-sea exploration,but grapples with high hydrostatic pressure’s unpredictable impact on its mechanical performances.In our previous work,a self-powered soft robot showed excellent work performance in the Mariana Trench at a depth of 11000 m,yet experienced notable degradation in deforming capability.Here,we propose a magnetic loading method for characterizing elastomer’s mechanical properties under extremely high hydrostatic pressure of up to 120 MPa.This method facilitates remote loading and enables in-situ observation,so that the dimensions and deformation at high hydrostatic pressure are obtained and used for calculations.The results reveal that the Young’s modulus of Polydimethylsiloxane(PDMS)monotonously increases with pressure.It is found that the relative increase in Young’s modulus is determined by its initial value,which is 8% for an initial Young’s modulus of 2200 kPa and 38% for 660 kPa.The relation between initial Young’s modulus and relevant increase can be fitted by an exponential function.The bulk modulus of PDMS is about 1.4 GPa at 20℃ and is barely affected by hydrostatic pressure.The method can quantify alterations in the mechanical properties of elastomers induced by hydrostatic pressure,and provide guidance for the design of soft robots which serve in extreme pressure environment.

关 键 词：ELASTOMER hydrostatic pressure mechanical property CHARACTERIZATION 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]