Thermo-mechanical deformation for thermo-induced shape memory polymers at equilibrium and non-equilibrium temperatures: Experiment and simulation

Li, Jian; Liang, Zhihong; Chen, Kaijuan; Zhang, Xu; Kang, Guozheng; Kan, Qianhua

doi:10.1016/j.polymer.2023.125762

Cited by 8 publications

(2 citation statements)

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“…In fact, the thermomechanical behavior is the response of SMPs during the thermo-mechanical processes. In the investigation of the complex thermo-mechanical behaviors of thermo-plastic SMPs, thermo-mechanical control processes mainly include four stages [15,16]: Stage (1) loading at the high-temperature, Stage (2) fixing shape when cooling to the low-temperature, Stage (3) unloading at the low-temperature, and Stage (4) recovering when heating to the high-temperature. At Stage (4), the different constrained conditions reflect the different recovery modes.…”

Section: Introductionmentioning

confidence: 99%

“…At Stage (4), the different constrained conditions reflect the different recovery modes. For instance, the recovery mode with stressfree when heating is called free recovery, shown in Stage (4) of figure 1 The shape memory process is a complex thermomechanical deformation process since the stress, strain and temperature always change in the whole process [15][16][17]. Therefore, the effects of the loading conditions on shape memory behaviors should be investigated to improve the understanding of shape memory effects.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation on 4D printed intelligent assembly cushion with adjustable pre-tightening force

Li,

Huang

2023

Smart Mater. Struct.

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In order to design an intelligent assembly cushion with an adjustable pre-tightening force, a reentrant honeycomb structure was printed by additive manufacturing to realize the active and intelligent assembly process of filling gaps. The thermo-mechanical deformation experiments of the reentrant honeycomb structure were conducted at different pre-compressions, constrained displacements, and recovery temperatures. The recovery force and the force recovery ratio under semi-constrained conditions are explored emphatically. The results show that pre-compression, constrained displacement, and recovery temperature affect the recovery force and force recovery ratio under semi-constrained conditions. The recovery force and force recovery ratio increase with pre-compression, decrease with constrained displacement, and increase with recovery temperature below the glass transition temperature. Based on these results, the adjustability of the recovery force of a reentrant honeycomb cushion can be controlled by changing the thermo-mechanical deformation processes. Finally, the reentrant honeycomb cushion is applied to the mimetic assembly environment for corresponding testing, achieving the design of an active and intelligent assembly cushion with an adjustable pre-tightening force.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%