... Abstract Many scientific developments pioneered by governmental research organizations are subsequently applied to consumer products. The use of shape memory alloys (SMAs) by NASA at the end of the 20th century motivated companies to incorporate these materials and their unique properties...

... on the manufactured gripper system to evaluate its performance. To enable a comprehensive evaluation, a control strategy was devised prior to the study, with the objectives of preventing thermal overheating, enhancing dynamics, and achieving a substantial reduction in power consumption. shape memory alloys...

... such as shape memory alloys can be more advantageous for the actuation of soft robotic underwater grippers because there is less need for complex electronic systems. Therefore, this project explores the use of smart materials for the actuation of a soft robotic underwater gripper. With this aim, three different...

... Abstract As a unique subclass of multi-functional and smart materials, iron-based shape memory alloys have gained tremendous attention in recent years by virtue of their promising pseudoelastic properties combined with relatively low production costs. Especially for large-scale applications...

..., which change the coolant viscosity and thus the pressure conditions in the pump. In order to adapt the operating point to the current temperature, one option is to change the blade geometry of the rotating impeller. Shape-memory-alloys (SMA) are perfectly suited to fulfil this task. However...

... Abstract Shape Memory Alloys (SMA) are thermosensitive materials that can change their geometry when a certain temperature is reached. Compared to conventional drives SMA based actuator systems provide many advantages and have already been successfully established on the market in various...

... Abstract Advancements in the design of knitted Shape Memory Alloy (SMA) actuators have produced highly functional and easy-to-wear advanced textiles with variable fit/stiffness properties. Annealing SMA at high temperatures can alter their thermomechanical properties; however, heat treatments...

... Abstract Shape Memory Alloy (SMA) based actuator systems provide many advantages compared to conventional actuators and have already successfully established themselves on the market in various applications. The state of the art shows a large number of SMA applications in the field of joining...

... is proposed. The model incorporates the mechanics of shape memory alloy (SMA) behavior in a folding C3M design. The combined application of pseudo-rigid body modeling and SMAs allows for the prediction of large recoverable deformations through superelasticity. In previous work, a segmented pseudo-rigid body...

... Abstract A phenomenological model is proposed for shape memory alloys considering the presence of uniformly distributed voids. The model is developed within a modified generalized standard materials framework, which considers the presence of constraints on the state variables and ensures...

..., and in addition to high costs. The main objective of this paper is to prove that pseudoelastic shape memory alloys (SMA) are potentially suitable for use in sports and rehabilitation equipment and offer additional value in the area of training flexibility combined with high training resistance. Therefore...

... Abstract In this paper, a shape memory alloy (SMA) based handling system is presented. The gripping system consists of two different actuator systems based on SMA wires. The first one is a reconfigurable end-effector with four independent gripping arms. The second SMA actuator system is a bi...

... to impact or variable air permeability. Active textiles are traditional textile structures that integrate smart materials, such as shape memory alloys, shape memory polymers, or carbon nanotubes, to enable spatial actuation behavior, such as contraction for on-body compression or corrugation for haptic...

...NUMERICAL EVALUATION OF THE EFFECT OF NI4TI3 PRECIPITATES ON THE OVERALL THERMO-MECHANICAL RESPONSE OF NITI SHAPE MEMORY ALLOYS Austin Cox Theocharis Baxevanis Dimitris Lagoudas Department of Aerospace Engineering, Texas A&M University, College Station, Texas 77840 ABSTRACT The effect...

...ON THE ENERGY RELEASE RATE DURING GLOBAL THERMO-MECHANICALLY-INDUCED PHASE TRANSFORMATION IN SHAPE MEMORY ALLOYS Antonino Parrinello Theocharis Baxevanis Dimitris Lagoudas Department of Aerospace Engineering, Texas A&M University College Station, Texas 77840 ABSTRACT In this work, the effect...

...IMPACT OF LENGTH MISMATCH ON THE FATIGUE LIFE OF PARALLEL SHAPE MEMORY ALLOY WIRES Christopher B. Churchill Anthony Bedegi HRL Laboratories, 3011 Malibu Canyon Road, Malibu, CA 90265 Xiujie Gao General Motors R&D Center, 30500 Mound Rd. Warren MI 48090 United States ABSTRACT Shape memory alloy (SMA...

... Station, Texas, 77840 ABSTRACT Shape Memory Alloy (SMA) composites are being increas- ingly investigated to address a variety of engineering problems. An application of growing interest is an SMA-MAX phase ce- ramic composite for use in extreme environments. By joining these two constituents...

... A new hybrid shape memory alloy (SMA)-ceramic composite is being developed for use in extreme environments. The proposed composition is intended to address past issues with brittle failure in the ceramic phase by generating a compressive residual stress state in that phase. This biasing load...

... A finite-element analysis of stable crack growth in superelastic Shape Memory Alloys (SMAs) is carried out for plane strain, mode I loading. The small-scale transformation assumption is employed in the calculations using displacement boundary conditions on a circular region that encloses...

... In this work, the influence of the latent heat of transformation and heat transfer on the performance of shape memory alloy (SMA) actuators is numerically explored. A 1D analytical model is first considered and used to perform parametric studies on the effects of geometry and heat transfer...