Development of a McKibben artificial muscle using a shape-memory polymer

2010 ◽  
Author(s):  
Kazuto Takashima ◽  
Jonathan Rossiter ◽  
Toshiharu Mukai
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Artificial Muscle

McKibben artificial muscle realizing variable contraction characteristics using helical shape-memory polymer fibers

2019 ◽  
Vol 295 ◽  
pp. 637-642 ◽  
Author(s):  
Shigeyoshi Yahara ◽  
Shuichi Wakimoto ◽  
Takefumi Kanda ◽  
Kouya Matsushita
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Artificial Muscle ◽  
Polymer Fibers

scholarly journals High performance and tunable artificial muscle based on two-way shape memory polymer

RSC Advances ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 1127-1136 ◽  
Author(s):  
J. Fan ◽  
G. Li
Keyword(s):  
Shape Memory ◽  
High Performance ◽  
Shape Memory Polymer ◽  
Artificial Muscle ◽  
Precursor Fiber

Polymeric artificial muscle by twist insertion in precursor fiber is a recent discovery. This study shows that chemically cross-linked two-way shape memory polymer muscles have remarkable and tunable axial actuation with lower actuation temperature.

Curved Type Pneumatic Artificial Rubber Muscle Using Shape-Memory Polymer

2012 ◽  
Vol 24 (3) ◽  
pp. 472-479 ◽  
Author(s):  
Kazuto Takashima ◽  
◽  
Toshiro Noritsugu ◽  
Jonathan Rossiter ◽  
Shijie Guo ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Shape Memory ◽  
External Force ◽  
Shape Memory Polymer ◽  
Fiber Reinforcement ◽  
Artificial Muscle ◽  
Pneumatic Artificial Muscle ◽  
Initial Shape

A novel pneumatic artificial muscle actuator is presented which is based on the design of a conventional curved type pneumatic bellows actuator. By inhibiting the extension of one side with fiber reinforcement, bending motion can be induced when air is supplied to the internal bladder. In this study, we developed a new actuator by replacing the fiber reinforcement with a Shape-Memory Polymer (SMP). The SMP can be deformed above its glass transition temperature (Tg) and maintains a rigid shape after it is cooled below Tg. When next heated above Tg, it returns to its initial shape. When only part of our actuator is warmed above Tg, only that portion of the SMP is soft and can actuate. Therefore, the direction of the motion can be controlled by heating. Moreover, our actuator can be deformed by an external force above Tg and fixed by cooling it below Tg.

McKibben artificial muscle using shape-memory polymer

2010 ◽  
Vol 164 (1-2) ◽  
pp. 116-124 ◽  
Author(s):  
Kazuto Takashima ◽  
Jonathan Rossiter ◽  
Toshiharu Mukai
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Artificial Muscle

scholarly journals Characteristics of Pneumatic Artificial Rubber Muscle Using Two Shape-Memory Polymer Sheets

2021 ◽  
Vol 33 (3) ◽  
pp. 653-664
Author(s):  
Kazuto Takashima ◽  
Daiki Iwamoto ◽  
Shun Oshiro ◽  
Toshiro Noritsugu ◽  
Toshiharu Mukai ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Sheet Thickness ◽  
Artificial Muscle ◽  
Experimental Results ◽  
Electrical Heating ◽  
Robot Hand ◽  
Manufacturing Method ◽  
Axial Extension ◽  
Directional Motion

We have developed a pneumatic artificial rubber muscle having a bending direction that can be changed using two shape-memory polymer (SMP) sheets, the stiffness of which depends on the temperature. In the present study, we attached two SMP sheets with embedded electrical heating wires to both sides of a pneumatic artificial rubber muscle in order to realize multidirectional actuation and evaluated the basic characteristics of the artificial muscle. The actuator is based on the design of a conventional curved-type artificial rubber muscle. Since only a heated SMP sheet becomes soft, the rigid SMP sheet inhibits the extension of the side of the actuator. Therefore, bending motion can be induced when air is supplied to the internal bladder. By controlling the temperature of the SMP sheets, the bending direction of the prototype actuator could be changed. Namely, three kinds of motions, such as two-directional bending and axial extension, became possible. Moreover, we improved the manufacturing method and the structure of the artificial muscle, such as the stitching method and the SMP sheet thickness, and evaluated the characteristics of the two-directional bending and the axial extension motions of the prototype actuator. We also calculated the theoretical values and compared these values with the experimental results. Furthermore, we examined the application of the actuators to a robot hand. Using the two-directional motion of the actuator, the proposed robot hand can grasp either small or large objects. The experimental results conducted using this prototype confirm the feasibility of the newly proposed actuator.

scholarly journals Design of Shape Memory Thermoplastic Material Systems for FDM-Type Additive Manufacturing

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4254
Author(s):  
Paulina A. Quiñonez ◽  
Leticia Ugarte-Sanchez ◽  
Diego Bermudez ◽  
Paulina Chinolla ◽  
Rhyan Dueck ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Shape Memory ◽  
Thermomechanical Processing ◽  
Material Selection ◽  
Shape Memory Polymer ◽  
Fused Filament Fabrication ◽  
Materials Development ◽  
Thermoplastic Material ◽  
Polymer Systems ◽  
Injection Molded

The work presented here describes a paradigm for the design of materials for additive manufacturing platforms based on taking advantage of unique physical properties imparted upon the material by the fabrication process. We sought to further investigate past work with binary shape memory polymer blends, which indicated that phase texturization caused by the fused filament fabrication (FFF) process enhanced shape memory properties. In this work, two multi-constituent shape memory polymer systems were developed where the miscibility parameter was the guide in material selection. A comparison with injection molded specimens was also carried out to further investigate the ability of the FFF process to enable enhanced shape memory characteristics as compared to other manufacturing methods. It was found that blend combinations with more closely matching miscibility parameters were more apt at yielding reliable shape memory polymer systems. However, when miscibility parameters differed, a pathway towards the creation of shape memory polymer systems capable of maintaining more than one temporary shape at a time was potentially realized. Additional aspects related to impact modifying of rigid thermoplastics as well as thermomechanical processing on induced crystallinity are also explored. Overall, this work serves as another example in the advancement of additive manufacturing via materials development.

Autonomous Off‐Equilibrium Morphing Pathways of a Supramolecular Shape‐Memory Polymer

2021 ◽  
pp. 2102473
Author(s):  
Wenjun Peng ◽  
Guogao Zhang ◽  
Qian Zhao ◽  
Tao Xie
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer

scholarly journals Pressure Orientation-Dependent Recovery of 3D-Printed PLA Objects with Varying Infill Degree

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1275 ◽  
Author(s):  
Guido Ehrmann ◽  
Andrea Ehrmann
Keyword(s):  
Shape Memory ◽  
Fused Deposition Modeling ◽  
Static Load ◽  
Shape Memory Polymer ◽  
Applied Pressure ◽  
Poly Lactic Acid ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Load Tests ◽  
3D Printed

Poly(lactic acid) is not only one of the most often used materials for 3D printing via fused deposition modeling (FDM), but also a shape-memory polymer. This means that objects printed from PLA can, to a certain extent, be deformed and regenerate their original shape automatically when they are heated to a moderate temperature of about 60–100 °C. It is important to note that pure PLA cannot restore broken bonds, so that it is necessary to find structures which can take up large forces by deformation without full breaks. Here we report on the continuation of previous tests on 3D-printed cubes with different infill patterns and degrees, now investigating the influence of the orientation of the applied pressure on the recovery properties. We find that for the applied gyroid pattern, indentation on the front parallel to the layers gives the worst recovery due to nearly full layer separation, while indentation on the front perpendicular to the layers or diagonal gives significantly better results. Pressing from the top, either diagonal or parallel to an edge, interestingly leads to a different residual strain than pressing from front, with indentation on top always firstly leading to an expansion towards the indenter after the first few quasi-static load tests. To quantitatively evaluate these results, new measures are suggested which could be adopted by other groups working on shape-memory polymers.

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