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Published on: August 7, 2018
Materials science. Dynamic mechanical behavior of multilayer graphene via supersonic projectile penetration
Jae-Hwang Lee1, Phillip E Loya2, Jun Lou2
1Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77005, USA. Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003, USA. leejh@umass.edu elt@rice.edu.
Abstract:
Multilayer graphene is an exceptional anisotropic material due to its layered structure composed of two-dimensional carbon lattices. Although the intrinsic mechanical properties of graphene have been investigated at quasi-static conditions, its behavior under extreme dynamic conditions has not yet been studied. We report the high-strain-rate behavior of multilayer graphene over a range of thicknesses from 10 to 100 nanometers by using miniaturized ballistic tests. Tensile stretching of the membrane into a cone shape is followed by initiation of radial cracks that approximately follow crystallographic directions and extend outward well beyond the impact area. The specific penetration energy for multilayer graphene is ~10 times more than literature values for macroscopic steel sheets at 600 meters per second.
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