Toward the low actuation temperature of flexible shape memory polymer composites with room temperature deformability via induced plasticizing effect

2017 ◽  
Vol 5 (44) ◽  
pp. 8845-8853 ◽  
Author(s):  
Shenyang Cai ◽  
Yu-Chen Sun ◽  
Jie Ren ◽  
Hani E. Naguib
Keyword(s):  
Low Temperature ◽  
Shape Memory ◽  
Polymer Composites ◽  
Room Temperature ◽  
Shape Memory Polymer ◽  
Shape Memory Properties

Room temperature deformable PLA/TPU/PEG blends demostrate superior shape memory properties under low temperature environments due to the induced plasticizing effect.

Development of liquid crystalline polyurethane composites with stage-responsive shape memory effects

2018 ◽  
Vol 9 (5) ◽  
pp. 576-583 ◽  
Author(s):  
Shaojun Chen ◽  
Jianfeng Ban ◽  
Luona Mu ◽  
Haitao Zhuo
Keyword(s):  
Shape Memory ◽  
Polymer Composites ◽  
Liquid Crystalline ◽  
Shape Memory Polymer ◽  
Memory Effects ◽  
Shape Memory Properties ◽  
Shape Memory Effects ◽  
Polyurethane Composites

Novel liquid crystalline shape memory polymer composites with interesting staging-responsive shape memory properties were successfully prepared. The liquid crystalline shape memory polymer composites maintain the intrinsic reversible liquid crystalline properties of Azo11.

Deployment performance of shape memory polymer composite hinges at low temperature

2019 ◽  
Vol 30 (17) ◽  
pp. 2625-2638 ◽  
Author(s):  
Van Luong Le ◽  
Vinh Tung Le ◽  
Nam Seo Goo
Keyword(s):  
Low Temperature ◽  
Shape Memory ◽  
Polymer Composite ◽  
Room Temperature ◽  
Shape Memory Polymer ◽  
Heating Element ◽  
Heating Process ◽  
Space Applications ◽  
Design Modification ◽  
The Impact

Shape memory polymer composite hinges, adapted for possible space applications, were successfully designed and fabricated, and performance tests at room temperature confirmed their full recoverability in our previous studies. Since shape memory polymer composite hinges are intended for space applications, they should be able to operate at low temperature. Even though the deployment of the hinge at room temperature triggered by the stimulation of a heating element has been quite promising, a suitable design for a shape memory polymer composite hinge with a heating element is more important at low temperatures because shape memory polymer composite hinges lose much heat to the environment. The recoverability of shape memory polymer composite hinges and the impact of the heating element design on the deployment time at low temperature are brought to light in this article. A shape memory polymer composite hinge with an attached heating element was fabricated as in our previous studies. The necessary power and supply power for deployment of the shape memory polymer composite hinge at a low temperature of –10°C were calculated, and a finite element analysis for the heating process was performed with the supply power. A folding and deployment test of the shape memory polymer composite hinge at –10°C was performed to show its shape recoverability. However, the shape memory polymer composite hinge did not deploy to its original shape. To determine the reason, measurements of temperature distribution were done using an infrared camera and thermocouples. The results revealed that the low temperature along the two side edges of the shape memory polymer composite tape prevented full deployment of the shape memory polymer composite hinge, which also revealed the need for design modification. The folding and deployment test of our modified shape memory polymer composite hinge demonstrated a nearly full deployment.

Hybrid Electroactive Shape Memory Polymer Composites with Room Temperature Deformability

2019 ◽  
Vol 304 (10) ◽  
pp. 1900196 ◽  
Author(s):  
Yu‐Chen Sun ◽  
Marco Chu ◽  
Morris Huang ◽  
Omer Hegazi ◽  
Hani E. Naguib
Keyword(s):  
Shape Memory ◽  
Polymer Composites ◽  
Room Temperature ◽  
Shape Memory Polymer

Modal Analyses of Deployable Truss Structures Based on Shape Memory Polymer Composites

2016 ◽  
Vol 08 (07) ◽  
pp. 1640009 ◽  
Author(s):  
Fengfeng Li ◽  
Liwu Liu ◽  
Xin Lan ◽  
Tong Wang ◽  
Xiangyu Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Shape Memory ◽  
Polymer Composites ◽  
Dynamic Properties ◽  
Low Cost ◽  
Shape Memory Polymer ◽  
Truss Structures ◽  
Modal Test ◽  
The Stability ◽  
Mechanical Devices

With large spatial deployable antennas used more widely, the stability of deployable antennas is attracting more attention. The form of the support structure is an important factor of the antenna’s natural frequency, which is essential to study to prevent the resonance. The deployable truss structures based on shape memory polymer composites (SMPCs) have made themselves feasible for their unique properties such as highly reliable, low-cost, light weight, and self-deployment without complex mechanical devices compared with conventional deployable masts. This study offers deliverables as follows: an establishment of three-longeron beam and three-longeron truss finite element models by using ABAQUS; calculation of natural frequencies and vibration modes; parameter studies for influence on their dynamic properties; manufacture of a three-longeron truss based on SMPC, and modal test of the three-longeron truss. The results show that modal test and finite element simulation fit well.

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