Autonomous Multifunctional Vehicle With Integrated Bio-Inspired SMA Actuated Grasper

Abstract The space exploration activities are merging new technologies in order to develop systems challenged to achieve capabilities for high mission experience. Inspired by the numerous applications in space exploration, with the integration of shape memory alloys (SMAs), a 3D printed continuous All Terrain Grasper Transport (AT-GT) vehicle with implemented multi-locomotion grasper was created. In order to reduce failure of the mechanical system, the vehicle is equipped with SMA suspension and SMA tensioner of a pulley system with adaptable height able to achieve movement on a given trajectory and adjust to any terrain. SMA actuators provide controllable actuation based on the simplicity of their design and the shape memory effect. By using the advantages of the origami engineering, soft robotics and smart material implementation, a bio-inspired autonomous grasper was integrated on the AT-GT, capable of leaving the vehicle, grabbing an object and bringing it back to the vehicle. The concept development, the analytical models and the prototype including the benefits of the combined work of the vehicle and the grasper are presented.

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3D Printed Shape Memory Hydrogels for Soft Robotics

ECS Meeting Abstracts ◽

10.1149/ma2018-01/42/2452 ◽

2018 ◽

Keyword(s):

Shape Memory ◽

Soft Robotics ◽

3D Printed

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

Polymers ◽

10.3390/polym13081275 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1275 ◽

Cited By ~ 1

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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3D-Printed Bioplastics with Shape-Memory Behavior Based on Native Bovine Serum Albumin

ACS Applied Materials & Interfaces ◽

10.1021/acsami.0c22377 ◽

2021 ◽

Author(s):

Eva Sanchez-Rexach ◽

Patrick T. Smith ◽

Alvaro Gomez-Lopez ◽

Maxence Fernandez ◽

Aitziber L. Cortajarena ◽

...

Keyword(s):

Bovine Serum Albumin ◽

Serum Albumin ◽

Shape Memory ◽

Bovine Serum ◽

Shape Memory Behavior ◽

3D Printed ◽

Behavior Based

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Bending performance and failure behavior of 3D printed continuous fiber reinforced composite corrugated sandwich structures with shape memory capability

Composite Structures ◽

10.1016/j.compstruct.2021.113626 ◽

2021 ◽

Vol 262 ◽

pp. 113626

Author(s):

Chengjun Zeng ◽

Liwu Liu ◽

Wenfeng Bian ◽

Jinsong Leng ◽

Yanju Liu

Keyword(s):

Shape Memory ◽

Sandwich Structures ◽

Failure Behavior ◽

Fiber Reinforced ◽

Continuous Fiber ◽

Bending Performance ◽

Fiber Reinforced Composite ◽

Reinforced Composite ◽

3D Printed

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Physical property of 3D-printed sinusoidal pattern using shape memory TPU filament

Textile Research Journal ◽

10.1177/0040517520919750 ◽

2020 ◽

Vol 90 (21-22) ◽

pp. 2399-2410 ◽

Cited By ~ 2

Author(s):

Shahbaj Kabir ◽

Hyelim Kim ◽

Sunhee Lee

Keyword(s):

Mechanical Properties ◽

Tensile Test ◽

Shape Memory ◽

Fused Deposition Modeling ◽

Loss Modulus ◽

Thermoplastic Polyurethane ◽

Heating Process ◽

Fused Deposition ◽

3D Printed ◽

Sinusoidal Pattern

This study has investigated the physical properties of 3D-printable shape memory thermoplastic polyurethane (SMTPU) filament and its 3D-printed sinusoidal pattern obtained by fused deposition modeling (FDM) technology. To investigate 3D filaments, thermoplastic polyurethane (TPU) and SMTPU filament were examined by conducting infrared spectroscopy, x-ray diffraction (XRD), dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC) and a tensile test. Then, to examine the 3D-printed sinusoidal samples, a sinusoidal pattern was developed and 3D-printed. Those samples went through a three-step heating process: (a) untreated state; (b) 5 min heating at 70°C, cooling for 30 min at room temperature; and (c) a repeat of step 2. The results obtained by the three different heating processes of the 3D-printed sinusoidal samples were examined by XRD, DMTA, DSC and the tensile test to obtain the effect of heating or annealing on the structural and mechanical properties. The results show significant changes in structure, crystallinity and thermal and mechanical properties of SMTPU 3D-printed samples due to the heating steps. XRD showed the increase in crystallinity with heating. In DMTA, storage modulus, loss modulus and the tan σ peak position also changed for various heating steps. The DSC result showed that the Tg for different steps of the SMTPU 3D-printed sample remained almost the same at around 51°C. The tensile property of the TPU 3D-printed sinusoidal sample decreased in terms of both load and elongation with increased heating processes, while for the SMTPU 3D-printed sinusoidal sample, the load decreased but elongation increased about 2.5 times.

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Concept for a 3D-printed soft rotary actuator driven by a shape-memory alloy

Smart Materials and Structures ◽

10.1088/1361-665x/aab56f ◽

2018 ◽

Vol 27 (5) ◽

pp. 055005 ◽

Cited By ~ 9

Author(s):

Han Yuan ◽

Frédéric Chapelle ◽

Jean-Christophe Fauroux ◽

Xavier Balandraud

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Rotary Actuator ◽

3D Printed

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The small spacecraft with a magnetic sail on high-temperature superconductors

Space engineering and technology ◽

10.33950/spacetech-2308-7625-2021-2-51-61 ◽

2021 ◽

pp. 51-61

Author(s):

Timur Sh. KOMBAEV ◽

Mikhail K. ARTEMOV ◽

Valentin K. SYSOEV ◽

Dmitry S. DEZHIN

Keyword(s):

Magnetic Field ◽

Solar Wind ◽

High Temperature ◽

Shape Memory ◽

New Technologies ◽

High Temperature Superconductors ◽

Solar Wind Plasma ◽

Large Area ◽

Small Spacecraft ◽

Shape Memory Materials

It is proposed to develop a small spacecraft for an experiment using high-temperature superconductors (HTS) and shape memory materials. The purpose of the experiment is to test a technological capability of creating a strong magnetic field on the small spacecraft using HTS and shape memory materials for deployed large-area structures, and study the magnetic field interaction with the solar wind plasma and the resulting force impact on the small spacecraft. This article is of a polemical character and makes it possible to take a fresh look at the applicability of new technologies in space-system engineering. Key words: high-temperature superconductors, shape memory materials, solar wind, spacecraft.

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