Development and mechanical properties of adaptive fiber-reinforced plastics

Ashir, Moniruddoza; Nocke, Andreas; Cherif, Chokri

doi:10.1177/1528083718757523

Cited by 18 publications

(9 citation statements)

References 16 publications

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“…The results of this research project form the foundation for the manufacturing of adaptive fiber-reinforced composites with SMA-HYs. 7,19,30 Further research activity will focus on the development of adaptive FRPs with structurally integrated SMA-HYs by weaving and their electro-bending characterization.…”

Section: Discussionmentioning

confidence: 99%

Development of shape memory alloy hybrid yarns for adaptive fiber-reinforced plastics

Ashir

Nocke

Cherif

2018

Textile Research Journal

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The application of shape memory alloys (SMAs) for the development of adaptive fiber-reinforced plastics has been expanding steadily in recent years. In order to prevent matrix damage and optimize the actuating potential of SMAs during the process of thermally induced activation, a barrier layer between SMAs and the matrix of fiber-reinforced plastics is required. This article approaches the textile technological development of SMA hybrid yarns as a core–sheath structure using friction spinning technology, whereby the SMA serves as the core. Four types of hybrid yarns are produced by varying the number of process stages from one to three, as well as the core and sheath materials. The decoupling of the SMA from fiber-reinforced plastics is crucial for optimizing the actuating potential of SMA, thus it is tested by means of the pull-out test. Although the material loss coefficient increases by raising the number of process stages, the three-stage processing of SMA hybrid yarn with an additional glass roving is found to be the most suitable variation for decoupling SMA from the matrix of fiber-reinforced plastics.

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Section: Discussionmentioning

confidence: 99%

Development of shape memory alloy hybrid yarns for adaptive fiber-reinforced plastics

Ashir

Nocke

Cherif

2018

Textile Research Journal

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“…Wire SMA actuators have also been utilized to prepare adaptive fabrics. In a recent example, Cherif and co‐workers prepare a friction spun hybrid yarn containing SMAs that are integrated into plain, twill, and satin reinforcement fabrics 44. Similarly, Kang et al employs an SMA‐driven actuator bridge that interfaces with a shape memory polymer to manipulate the fabric curvature over a temperature sweep 45…”

Section: Shape Memory Alloysmentioning

confidence: 99%

Materials as Machines

2020

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of responsive materials as machines is in robotics. The vision, leadership, and research of Bar-Cohen is seminal in both invigorating and focusing current-day research activities to develop responsive materials [2] and implement [3] them as lightweight, dexterous, and gentle (e.g., soft) robotic elements. In this spirit, this review exhaustively details the materials, the nature of their stimuli-response, and discusses considerations for their implementation in robotic systems and subsystems.Robotics is a well-established but growing field of research. Sustained progress in both performance and functionality continue to be realized in commercial robotic systems largely based on conventional materials and their integration with mechanisms. A recent example is the Atlas robot from Boston Dynamics [4] (Figure 1a). The incorporation of stimuli-responsive materials in robotics has largely focused on component-level demonstrations to extend the performance of a subsystem (such as a hand or gripper).Stimuli-responsive materials, spanning nearly all classes of materials and size scales, are currently subject to widespread examination in corporate, government, and academic research laboratories (Figure 1b-d). [5][6][7] In some cases, these materials have already found widespread commercial implementation in end use and are comparatively mature. The materials and fundamentals of their responses are summarized in Figure 2. Shape memory alloys (SMAs) and ceramic piezoelectric materials are distinctive in that they are hard, stimuli-responsive materials. Deformation of these materials can produce large energy densities due to their inherent stiffness. Electroactive polymers (EAPs) remain a topic of considerable interest, particularly dielectric elastomer actuators (DEAs). Engineered systems are rapidly emerging and enabling performance gains in robotics, largely based on pneumatic or fluidic (such as HASEL [8] actuators) transport processes that localize deformation to generate force or produce motion. Soft materials, such as shape memory polymers (SMPs), hydrogels, and liquid crystalline polymer networks (LCNs) and elastomers (LCEs) may offer distinctive functional performance to robotic systems in allowing local control of deformation without the need for complex interfacing with mechanisms. As will be evident, each of these materials has inherent advantages and performance tradeoffs that must be considered in functional implementations. However, responsive material systems have a common obstacle to widespread use: the performance and Machines are systems that harness input power to extend or advance function. Fundamentally, machines are based on the integration of materials with mechanisms to accomplish tasks-such as generating motion or lifting an object. An emerging research paradigm is the design, synthesis, and integration of responsive materials within or as machines. Herein, a particular focus is the integration of responsive materials to enable robotic (machine) functions such as gripping, lifting, or motility (walk...

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“…To successfully overcome this challenge, the next step of the authors was the textile-technical integration of SMAs into the reinforcing fabric during weaving. In this case, the SMA that was interlaced with the reinforcing fabrics was either interlaced with the warp 33 or weft yarns. [34][35][36][37] However, for diverse application-related scenarios, the complex movement of the actuator network in the adaptive FRP is necessary.…”

Section: Introductionmentioning

confidence: 99%

Development of shape memory alloy-based adaptive fiber-reinforced plastics by means of open reed weaving technology

Ashir

Cherif

2020

Journal of Reinforced Plastics and Composites

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The functionalization of fiber-reinforced plastics has been improved continuously in recent years in order to broaden their application potential. By using shape memory alloys in fiber-reinforced plastics, adaptive fiber-reinforced plastics can be developed, which in turn can change their shape depending on the activation of shape memory alloys. In order to ensure the proper force transmission from shape memory alloys to fiber-reinforced plastic, these shape memory alloys need to be integrated into the reinforcing fabric. Hence, this paper presents the application of open reed weaving technology for the development of functionalized preforms for adaptive fiber-reinforced plastics. For an optimized shape memory effect during their thermal induced activation, the shape memory alloys were coated with release agent and then integrated into the woven fabric by open reed weaving technology. The hinged width of functionalized preforms was varied from 50 mm to 150 mm. These preforms were infused by a thermosetting resin matrix system with a modifier. Subsequently, the electro-mechanical testing of adaptive fiber-reinforced plastics was executed. Results show that the maximum deformation of adaptive fiber-reinforced plastics was proportional to their hinged width.

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Development and mechanical properties of adaptive fiber-reinforced plastics

Cited by 18 publications

References 16 publications

Development of shape memory alloy hybrid yarns for adaptive fiber-reinforced plastics

Development of shape memory alloy hybrid yarns for adaptive fiber-reinforced plastics

Materials as Machines

Development of shape memory alloy-based adaptive fiber-reinforced plastics by means of open reed weaving technology

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