Now, mantis shrimp inspired materials that are tougher than airplanes
Washington: Researchers have developed a design structure for composite materials which is more impact resistant and tougher than the standard used in airplanes.
The peacock mantis shrimp, or stomatopod, is a 4- to 6-inch-long rainbow-colored crustacean with a fist-like club that accelerates underwater faster than a 22-calibur bullet.
Researchers, led by David Kisailus, a Kavli Fellow of the National Academy of Science and the Winston Chung Endowed Chair of Energy Innovation at the UC Riverside`s Bourns College of Engineering, an associate professor of chemical engineering, are interested in the club because it can strike prey thousands of times without breaking.
In experiments outlined in the paper, the researchers created carbon fiber-epoxy composites with layers at three different helicoidal angles ranging from about 10 degrees to 25 degrees.
They also built two control structures: a unidirectional, meaning the layers were placed directly on top and parallel to each other, and a quasi-isotropic, the standard used in the aerospace industry, which has alternating layers stacked upon each other in an orientation of 0 degrees (first layer), -45 degrees (second layer), +45 degrees (third layer), 90 degrees (fourth layer) and so on.
The researchers used a drop weight impact testing system with a spherical tip that on impact creates 100 joules of energy at USC with their collaborator, Professor Steven R. Nutt. This replicates testing done by the aircraft industry. Following the tests, they measured external visual damage, depth of the dent and internal damage by using ultrasound scans.
Their results showed that the helicoidal samples, in general, displayed a significant increase, about 15 percent to 20 percent, in residual strength after impact compared to the quasi-isotropic samples.
The paper has been published online in the journal Acta Biomaterialia.
More from India
More from World
More from Sports
More from Entertaiment
- Over 60 cadets killed in Pakistan police academy attack
- DNA: Exclusive report on the extreme sacrifices made by ITBP soldiers
- Watch: PM Narendra Modi's ''progressive'' remark on triple talaq
- I pay my tribute to martyr Naresh Pal: PM Narendra Modi
- Some people are creating confusion between me and my father: Akhilesh Yadav
- Explosion in Delhi's Naya Bazar, one killed; anti-terror wing, Special cell at spot
- This is why Cyrus Mistry was removed as Chairman of Tata Sons!
- WATCH: Akhilesh Yadav's emotional speech revealing the real reason behind Samajwadi Party crisis; he was about to cry
- Prompt action on border pushes Pak to offer olive branch, says both sides need to 'formalise' 2003 ceasefire
- 7th Pay Commission: Committee on Allowances proposes hike in HRA for central govt employees