Topic
Fracture toughness
About: Fracture toughness is a research topic. Over the lifetime, 39642 publications have been published within this topic receiving 854338 citations.
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TL;DR: In this article, the authors investigated the effect of three different types of nano-fillers on fracture toughness and failure mechanism of epoxy-based polymer nano-composites, including thermally reduced graphene oxide (TRGO), graphite nano-platelets (GNP), and multi-wall carbon nano-tubes (MWCNT).
450 citations
TL;DR: In this article, a composite system consisting of SiC yarn reinforced lithium aluminosilicate (LAS) glass-ceramic, containing ZrO2 as the nucleation catalyst, has been found to be reproducibly fabricated into composites that exhibit exceptional mechanical and thermal properties to temperatures of approximately 1000° C.
Abstract: Silicon carbide fibre reinforced glass-ceramic matrix composites have been investigated as a structural material for use in oxidizing environments to temperatures of 1000° C or greater. In particular, the composite system consisting of SiC yarn reinforced lithium aluminosilicate (LAS) glass-ceramic, containing ZrO2 as the nucleation catalyst, has been found to be reproducibly fabricated into composites that exhibit exceptional mechanical and thermal properties to temperatures of approximately 1000° C. Bend strengths of over 700 MPa and fracture toughness values of greater than 17 MN m−3/2 from room temperature to 1000° C have been achieved for unidirectionally reinforced composites of ∼ 50 vol% SiC fibre loading. High temperature creep rates of 10−5 h−1 at a temperature of 1000° C and stress of 350 MPa have been measured. The exceptional toughness of this ceramic composite material is evident in its impact strength, which, as measured by the notched Charpy method, has been found to be over 50 times greater than hot-pressed Si3N4.
446 citations
TL;DR: In this paper, a critical analysis is presented of the operating temperature windows for nine candidate fusion reactor structural materials: four reduced-activation structural materials (oxide-dispersion-strengthened and ferritic/martensitic steels containing 8-12%Cr, V-4Cr-4Ti, and SiC/SiC composites), copper-base alloys (CuNiBe), tantalum base alloys, and molybdenum and tungsten alloys.
442 citations
TL;DR: In this article, different types of interactions between the sliding particles and the wearing surface of the solid are distinguished between hard particles sliding on a softer solid surface and displaying or detaching material, and the theoretical models are supported by a lot of experimental results from studies on metallic or ceramic materials.
442 citations
TL;DR: In this article, it was shown that the work performed in the end region at the tip of a crack, where the fracture process takes place, is considered the essential work of fracture, and a constant for a particular sheet thickness.
Abstract: In a ductile material, the total work of fracture is not a material constant and linear fracture mechanics is inappropriate. The work performed in the end region at the tip of a crack, where the fracture process takes place, is considered the essential work of fracture, and a constant for a particular sheet thickness. It is shown that this essential work can be estimated from deep edge notched tension specimens by extrapolating the straight line relationship between the work of fracture and ligament length to zero ligament length.
439 citations