Comprehensive shape memory alloys constitutive models for engineering application

He, Bin; Dong, Xiaohu; Nie, Rui; Wang, Yufeng; Ao, Sansan; Wang, Guobiao

doi:10.1016/j.matdes.2022.111563

Cited by 7 publications

(2 citation statements)

References 59 publications

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“…Recently, researchers have presented several stimuli‐response materials that can achieve mechanical responses under the action of external fields, [ 17–20 ] such as light, [ 21 ] magnetic, [ 22,23 ] and electric fields. [ 24 ] Utilizing this distinctive feature of advanced materials, such as dielectric elastomers (DEs), [ 25–27 ] low‐melting‐point alloys (LMPAs), [ 28–30 ] and shape memory polymers (SMPs) [ 31–35 ] to construct soft machines, can endow them with tunable structural stiffness.…”

Section: Introductionmentioning

confidence: 99%

“…[9][10][11][12] To overcome this limitation, there is a need to devise an approach to enable the structural stiffness to be programmable for meeting diverse interaction requirements. [13][14][15][16] Recently, researchers have presented several stimuli-response materials that can achieve mechanical responses under the action of external fields, [17][18][19][20] such as light, [21] magnetic, [22,23] and electric fields. [24] Utilizing this distinctive feature of advanced materials, such as dielectric elastomers (DEs), [25][26][27] low-melting-point alloys (LMPAs), [28][29][30] and shape memory polymers (SMPs) [31][32][33][34][35] to construct soft machines, can endow them with tunable structural stiffness.…”

mentioning

confidence: 99%

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Synergizing Structural Stiffness Regulation with Compliance Contact Stiffness: Bioinspired Soft Stimuli‐Responsive Materials Design for Soft Machines

Ma,

Zhang,

Sun

et al. 2024

Adv Eng Mater

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Stiffness regulation strategies endow soft machines with stronger functionality to cope with diverse application requirements, for example manipulating heavy items by improving structural stiffness. However, most programmable stiffness strategies usually struggle to preserve the inherent compliant interaction capabilities following an enhancement in structural stiffness. In this study, inspired by the musculocutaneous system, we propose a soft stimuli‐responsive material (SRM) by combining shape memory alloy (SMA) into compliant materials. By characterizing the mechanical performance, the flexural modulus increases from 6.6 to 142.4 MPa under the action of active stimuli, crossing two orders of magnitude, while Young’s modulus stays at 2.2 MPa during programming structural stiffness. This comparative result indicates that our SRMs can keep a lower contact stiffness for compliant interaction although structural stiffness increases. Then, we develop three diverse soft machines to show the application potential of this smart material, such as robotic grippers, wearable devices, and deployable mechanisms. By applying our materials, these machines possess stronger load‐bearing capabilities. Meanwhile, these demonstrations also illustrate the efficacy of this paradigm in regulating the structural stiffness of soft machines while maintaining their compliant interaction capabilities.This article is protected by copyright. All rights reserved.

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