Skoltech researchers have investigated a promising type of composite materials in terms of their shape memory behavior: how they resume their original shape following deformation if exposed to the right temperature or other conditions. The materials studied were glass fiber-reinforced epoxy-based flat laminates, produced with a technique called pultrusion.

While it has considerable potential for manufacturing composites with shape memory for electronics, biomedicine, and more, the method's application to such materials is examined for the first time in the Skoltech-led study reported in Composites Part A: Applied Science and Manufacturing.

Shape memory polymers, or SMPs, are materials that can recover their initial shape under external stimuli such as temperature, light, moisture, acidity, electricity, or electromagnetic field. They are widely used in the aerospace, biomedical, and automotive industries, as well as in 4D printing, temperature sensors, and electronic devices.

SMPs are often reinforced with carbon, basalt, or glass fibers, resulting in composite materials with superior properties. A number of techniques are used for SMP composite manufacturing, most of them fairly well-studied. Surprisingly, until now there have been no studies on the shape memory effect in composites produced by pultrusion - the most efficient composite manufacturing process available. I

t is a fast, versatile, and low-waste technology that could potentially yield new types of shape memory structural components with unique combinations of geometries and mechanical properties, impossible to produce with other methods.

"In this study, we investigated the shape memory behavior and mechanical characteristics of epoxy-based pultruded flat laminates reinforced with unidirectional glass fibers. The analysis also encompassed the resin cure kinetics and the thermomechanical and thermophysical properties of the cured resin," commented the project's PI, Alexander Safonov of the Skoltech Center for Design, Manufacturing and Materials.

"Our findings may be used for further numerical simulations and the optimization of the pultrusion process. Besides, the results demonstrate that pultruded SMPCs show significant promise for structural applications," the researcher added.

Research Report: "Shape memory behavior of unidirectional pultruded laminate"

Related Links
Skolkovo Institute of Science and Technology (Skoltech)
Space Technology News - Applications and Research

Tweet

Thanks for being here; We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain. With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords. Our news coverage takes time and effort to publish 365 days a year. If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor $5 Billed Once credit card or paypal		SpaceDaily Monthly Supporter $5 Billed Monthly paypal only

DARPA announces research teams to advance fundamental science of atomic vapors
Washington DC (SPX) Sep 07, 2021
DARPA has announced its selection of eight industry and university research teams to support the Science of Atomic Vapors for New Technologies (SAVaNT) program that kicked off this week. The teams will develop innovative approaches to push the performance limits of atomic vapors at room temperature and exploit their unique advantages to demonstrate new capabilities for DoD. An additional performer has been selected and is expected to be on contract in the coming months. Quantum research in b ... read more