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Plastic ‘Spider’s Web’ Solution for Smashed Smartphone Screen

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Researchers from Polytechnique Montreal Canada are creating the most effective protection so far for smartphone screen, inspired by a spider web.

The 3D printed spider web will make smartphone screens safer than ever before once it is implemented.

The research team from the Polytechnique Montreale in Canada used additive manufacturing to design the fabric which has shown that it can absorb 96% of the energy of an impact without losing its integrity.

The new innovation could pave the way for unbreakable plastic protection for a whole range of electronic devices that are prone to breaking.

The research team consists of Frederick Gosselin, Daniel Therriault, and Shibo Zou two of whom are professors and the third being a student at Polytechnique Montreal’s Department of Mechanical Engineering. The trio has proven that the plastic web could be used to protect a phone screen from shattering with the force of impact.

The researchers created t heir innovation with inspiration from a natural spider’s web.

“A spider web can resist the impact of an insect colliding with it, due to its capacity to deform via sacrificial links at the molecular level, within silk proteins themselves,” said Professor Gosselin. “We were inspired by this property in our approach.”

The researchers worked with a polycarbonate that develops a honey-like viscosity when heated to create the web. They used a 3D printer to weave together a web of the polycarbonate fibers. The weaving was done quickly, giving the web time to solidify after it had already been woven.

It is during the weaving process, that the product acquires its extraordinary strength. Upon impact, the web deforms at a molecular level instead of breaking. The plastic forms circles that turn into a chain of loops.

“Once hardened, these loops turn into sacrificial links that give the fibre additional strength. When impact occurs, those sacrificial links absorb energy and break to maintain the fibre’s overall integrity – similar to silk proteins,” Gosselin divulged.

Lead author Shibo Zou demonstrated just how the web functions within a protective screen. He implanted webs into resin plates and tested the phones’ resistance to impact and witnessed impressive results.

The plastic webs were successful in distributing as much as 96% of the impact energy while remaining intact. The plastic web will experience slight deformation instead of breaking. It retains its integrity.

Professor Gosselin says that the innovation could pave the way for other innovations, like better bullet-proof glass or longer lasting smartphone screens, or protective coats for engines of aircraft.

The possibilities are certainly exciting. In the meantime, the team continues with their research.

Nature

Use of Artificial Intelligence Research to Identify Sick Livestock

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Livestock welfare can improved with the use of novel artificial intelligence procedures and behavioral analytics, providing reliable and rapid insights into animal health across the UK for farmers. The commercial feasibility program and research, co-funded by the Innovate UK, the UK’s innovation agency, set to be led by (QF) – Quant Foundry, collaborating with Agri-EPI Centre and the University of Bristol Vet School.

Dr. Chris Cormack heads the QF team to run a feasibility study together with Professor Andrew Dowsey and welfare experts for animals, Dr. Suzanne Held, Professor Michael Mendl, and Dr. Siobhan Mullan at the Bristol University and Agri-EPI Centre at their South West Dairy Development Centre in Somerset.

The project aims to provide the vets and farmers new cost-effective solutions in identifying illness in livestock and delivering cost savings and ways of reducing the farming impact on the environment.

Dr. Chris Cormack, the Managing Director Quant Foundry, said: “In conjunction with our research partners, Bristol Veterinary School and Agri-EPI, the study of behavioral analytics in animals will open up a new era in artificial intelligence-driven solutions for farmers. We have great hopes that not only can we help farmers provide improved care for their livestock but also help reduce their economic costs and their environmental impact.”

Professor Andrew Dowsey, a data solutions specialist for agriculture and health, and the Chair of Population Health Data Science in the Bristol Veterinary School, added: “This collaboration is a fantastic opportunity to translate cutting-edge artificial intelligence approaches to build upon the UK’s high standards in cattle welfare and support farmers in our targets for net-zero emissions.’’

Duncan Forbes, the Head of Dairy at Agri-EPI Centre, said that Agri-EPI’s South West Dairy Development Centre is dedicated developing and evaluating emerging technologies like this and to working with Quant Foundry and Bristol Vet School.’’

Throughout the project, the collaborating team will be seeking partners actively to help them build capability and commercialise as the project matures, which could range from direct investment to interested companies in search of compliment in their activities in existence in this upcoming area.

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Nature

Scientists Borrow a Trick or Two from a Beetle Tough Enough to Survive Getting Run Over by a Car

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Engineers believe that they may be able to develop new and stronger materials by studying a beetle so though that even when it is run over by a car, it emerges unfazed.

The engineers hope to create a stiff material that is still as ductile as a paper clip. Something that might make aircraft gas turbines safer and durable.

Based at the University of California, Irvine, and Purdue University identified two ‘elytron’ that look like armor. The elytra meet along a suture that runs the length of the beetle’s abdomen.

The elytra protect the wings of flying beetles and make it possible for them to fly. But the bee in question is the wingless diabolical ironclad beetle that distributes any force applied on the beetle across the body of the beetle evenly.

Engineer Pablo Zavattjeri says that the suture is a connector of exoskeletal blades that meet like puzzle pieces beneath the elytra and in the abdomen.

This jigsaw puzzle formation may come in handy in several ways. Researchers led by David Kisailus, a UCI professor worked to understand the phenomenon better by studying CT scans to accurately observe the structural components of the beetle’s exoskeleton.

They found that the diabolical ironclad beetle is capable of withstanding a force 39,000 times its body weight without fracturing. The UCI researchers used compressive steel plates to test the strength of the beetle’s exoskeleton. This force is the equivalent of 150 newtons.

For perspective, consider that the force of a car tire running over the beetle on a dirt surface is only 100 newtons.

The bee is strong enough to handle more than double the force that other land beetles can handle.

Zavattieri’s laboratory extensively used computer simulations and created 3D-printed models to isolate some structures and understand the role they play preserving the beetle even under extreme pressure.

Together, these studies show that the diabolical ironclad beetle is armed with two lines of defense that protect it from compressive loads.

It has interconnecting blades that connect to avoid dislodging from the suture, much like the puzzle pieces that they are.

It also delaminates the suture and the blades deform more gracefully to allow the exoskeleton to hold under pressure.

Both of these crucial features work to distribute the energy and prevent a killer pressure on its vulnerable neck that would otherwise snap under the impact, killing the beetle.

When you apply excessive force to the diabolical ironclad beetle’s exoskeleton, the blades pull away from the suture gently, just enough to avoid a sudden release of energy that would cause its neck to slap. The blades cannot interlock too little or too much.

Scientists don’t know yet if the diabolical ironclad beetle has any self-healing mechanism following a traumatic incident such as getting run over by a car.

“An active engineering challenge is joining together different materials without limiting their ability to support loads. The diabolical ironclad beetle has strategies to circumvent these limitations,” revealed David Restrepo. Restrepo is an assistant professor at the University of Texas at San Antonio.

Aircraft gas turbines combine metals and composite materials using a mechanical fastener which makes the machinery heavier and brings in stress that makes it vulnerable to corrosion and fractures.

According to engineer Maryam Hosseini who was also part of the research group, these fasteners negatively impact the system’s performance and must be replaced often. In comparison, the diabolical ironclad beetle’s interfaced sutures are more predictable and robust. The humble beetle could hold the solution to these problems.

Researchers have already tried to mimic the suture of the diabolical ironclad beetle by building a carbon fiber composite fastener instead of the mechanical fastener that is currently in use.

The new fastener was tested by researchers at Purdue University and proved tougher than standard aerospace fasteners. It is equal in strength.

Engineers now know that it is possible to make a transition from strong and brittle materials to strong and tough materials that disperse energy like the diabolical ironclad beetle breaks.

The Airforce Office of Scientific Research as well as the ArmyResearch Office is funding this research through the Multi-University Research Initiative.

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