Carbon fiber fabric/epoxy composites with electric- and light-responsive shape memory effect

Purpose This study aims to discuss the effect of carbon fiber on the electric-respone of shape memory epoxy property. Epoxy (EP) is a typical excellent thermosetting shape memory polymer (SMP). To enrich the shape memory epoxy (SMEP) responsive mode, the carbon fiber fabric-reinforced SMEP composites were prepared, and the mechanical properties and the electric- and light-responsive shape memory effect of the composites were investigated and confirmed. Design/methodology/approach The carbon fiber fabric/SMEP composites were prepared via a dipping method. The carbon fiber fabric was dipped into the waterborne epoxy emulsion and dried at room temperature and then post-cured in the oven at 120 °C for 2 h. The mechanical properties and the multi-responsive shape memory properties of the composites were tested and confirmed via tensile test instrument, DC electrical source and near-infrared (NIR) laser source control system. Findings The carbon fiber fabric/SMEP composites showed excellent electric- and light-responsive shape memory effect. Research limitations/implications High performance and multi-responsive shape memory materials have always been the goal of the scientists. Carbon fiber fabric and SMEP both consist of a good reputation in the field of composites, and the combination of both would set a solid foundation for getting a high performance and multi-responsive shape memory effect materials, which will enrich the responsive mode and broaden the application of SMEP. Originality/value Multi-responsive SMEP composites were prepared from waterborne epoxy and carbon fiber fabric.

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Effect of Sm Doping on the Microstructure, Mechanical Properties and Shape Memory Effect of Cu-13.0Al-4.0Ni Alloy

Materials ◽

10.3390/ma14144007 ◽

2021 ◽

Vol 14 (14) ◽

pp. 4007

Author(s):

Qimeng Zhang ◽

Bo Cui ◽

Bin Sun ◽

Xin Zhang ◽

Zhizhong Dong ◽

...

Keyword(s):

Mechanical Properties ◽

Shape Memory ◽

Shape Memory Effect ◽

Memory Effect ◽

Strengthening Effect ◽

Face Centered Cubic ◽

Compressive Fracture ◽

Fine Grain ◽

Fine Grain Strengthening ◽

Face Centered

The effects of rare earth element Sm on the microstructure, mechanical properties, and shape memory effect of the high temperature shape memory alloy, Cu-13.0Al-4.0Ni-xSm (x = 0, 0.2 and 0.5) (wt.%), are studied in this work. The results show that the Sm addition reduces the grain size of the Cu-13.0Al-4.0Ni alloy from millimeters to hundreds of microns. The microstructure of the Cu-13.0Al-4.0Ni-xSm alloys are composed of 18R and a face-centered cubic Sm-rich phase at room temperature. In addition, because the addition of the Sm element enhances the fine-grain strengthening effect, the mechanical properties and the shape memory effect of the Cu-13.0Al-4.0Ni alloy were greatly improved. When x = 0.5, the compressive fracture stress and the compressive fracture strain increased from 580 MPa, 10.5% to 1021 MPa, 14.8%, respectively. When the pre-strain is 10%, a reversible strain of 6.3% can be obtained for the Cu-13.0Al-4.0Ni-0.2Sm alloy.

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Effect of Cr additions on the phase constituent, mechanical properties, and shape memory effect of near–eutectoid Ti–4Au towards the biomaterial applications

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.159037 ◽

2021 ◽

Vol 867 ◽

pp. 159037

Author(s):

Wan–Ting Chiu ◽

Takuya Ishigaki ◽

Naoki Nohira ◽

Akira Umise ◽

Masaki Tahara ◽

...

Keyword(s):

Mechanical Properties ◽

Shape Memory ◽

Shape Memory Effect ◽

Memory Effect ◽

Phase Constituent

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Thermal cycling of stress-induced martensite for high-performance shape memory effect

Scripta Materialia ◽

10.1016/j.scriptamat.2014.02.003 ◽

2014 ◽

Vol 80 ◽

pp. 13-16 ◽

Cited By ~ 20

Author(s):

Riccardo Casati ◽

Maurizio Vedani ◽

Ausonio Tuissi

Keyword(s):

Thermal Cycling ◽

Shape Memory ◽

Shape Memory Effect ◽

Memory Effect ◽

High Performance

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Enhancement of mechanical properties and shape memory effect of Ti–Cr–based alloys via Au and Cu modifications

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2021.104707 ◽

2021 ◽

pp. 104707

Author(s):

Wan–Ting Chiu ◽

Kaoru Wakabayashi ◽

Akira Umise ◽

Masaki Tahara ◽

Tomonari Inamura ◽

...

Keyword(s):

Mechanical Properties ◽

Shape Memory ◽

Shape Memory Effect ◽

Memory Effect

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High performance shape memory effect in nitinol wire for actuators with increased operating temperature range

Functional Materials Letters ◽

10.1142/s1793604714500635 ◽

2014 ◽

Vol 07 (05) ◽

pp. 1450063 ◽

Cited By ~ 10

Author(s):

Riccardo Casati ◽

Carlo Alberto Biffi ◽

Maurizio Vedani ◽

Ausonio Tuissi

Keyword(s):

Shape Memory ◽

Shape Memory Effect ◽

Memory Effect ◽

High Performance ◽

Room Temperature ◽

Operating Temperature ◽

Niti Wire ◽

Shape Memory Actuators ◽

Nitinol Wire ◽

Operating Temperature Range

In this research, the high performance shape memory effect (HP-SME) is experimented on a shape memory NiTi wire, with austenite finish temperature higher than room temperature. The HP-SME consists in the thermal cycling of stress induced martensite and it allows achieving mechanical work higher than that produced by conventional shape memory actuators based on the heating/cooling of detwinned martensite. The Nitinol wire was able to recover about 5.5% of deformation under a stress of 600 MPa and to withstand about 5000 cycles before failure. HP-SME path increased the operating temperature of the shape memory actuator wire. Functioning temperatures higher than 100°C was reached.

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