000015208 001__ 15208
000015208 005__ 20161115100214.0
000015208 04107 $$aeng
000015208 046__ $$k2016-08-21
000015208 100__ $$aLi, Jiaoyan
000015208 24500 $$aTopological Design of Graphene with Enhances Fracture Toughness

000015208 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015208 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015208 506__ $$arestricted
000015208 520__ $$2eng$$aGraphene has exhibited ultra-high Young’s modulus and tensile strength, but very low fracture toughness which is close to that of an ideally brittle solid. As a typical example of 2D materials, the feature of the atomic thin thickness of graphene preserves flexibility for outof-plane topological design so as to improve its mechanical and physical properties, such as fracture toughness. Here, we propose a novel methodology based on phase field crystal method to construct a curved graphene which conforms to a targeted arbitrary 3D surface, and in which topological defects (pentagon-heptagon pairs) are generated spontaneously to comply the surface curvature. Aiming at improving fracture toughness by introducing effective energy dissipation mechanisms, two patterns (strip and blister) are systematically designed and studied. The results show that (i) the fracture toughness of the designed graphene is increased significantly, and (ii) the underlying toughening mechanisms come from crack tip blunting/trapping, daughter crack bridging, and dislocation sheltering.

000015208 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015208 653__ $$a

000015208 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015208 720__ $$aLi, Jiaoyan
000015208 8560_ $$ffischerc@itam.cas.cz
000015208 8564_ $$s136551$$uhttps://invenio.itam.cas.cz/record/15208/files/TS.SM05-5.02.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2066, code TS.SM05-5.02
.
000015208 962__ $$r13812
000015208 980__ $$aPAPER