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Encyclopedia > Brittleness
Look up brittleness in Wiktionary, the free dictionary.

A material is brittle if it is liable to fracture when subjected to stress. That is, it has little tendency to deform (or strain) before fracture. This fracture absorbs relatively little energy, even in materials of high strength, and usually makes a snapping sound. The word brittle has the following meanings: a solid material that can be easily fractured is brittle brittle is a form of toffee This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Wikipedia does not have an article with this exact name. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ... Look up material in Wiktionary, the free dictionary. ... For fractures in geologic formations, see Rock fracture. ... Stress is a measure of force per unit area within a body. ... This article is about the deformation of materials. ... Strength of materials is materials science applied to the study of engineering materials and their mechanical behavior in general (such as stress, deformation, strain and stress-strain relations). ...


When used in materials science, it is generally applied to materials that fail in tension rather than shear, or when there is little or no evidence of plastic deformation before failure. The Materials Science Tetrahedron, which often also includes Characterization at the center Materials science or Materials Engineering is an interdisciplinary field involving the properties of matter and its applications to various areas of science and engineering. ... Tension is a reaction force applied by a stretched string (rope or a similar object) on the objects which stretch it. ... Shear stress is a stress state where the stress is parallel or tangential to a face of the material, as opposed to normal stress when the stress is perpendicular to the face. ... For other uses, see Plasticity. ...


When a material has reached the limit of its strength, it usually has the option of either deformation or fracture. A naturally malleable metal can be made stronger by impeding the mechanisms of plastic deformation (reducing grain size, dispersion strengthening, work hardening, etc.), but if this is taken to an extreme, fracture becomes the more likely outcome, and the material can become brittle. Improving material toughness is therefore a balancing act. Malleability is a physical property of matter, signifying its capability of deformation, especially by hammering or rolling. ... A crystallite is a domain of solid-state matter that has the same structure as a single crystal. ... Work hardening, or strain hardening, is an increase in mechanical strength due to plastic deformation. ... In materials science and metallurgy, toughness is the resistance to fracture of a material when stressed. ...


This principle generalizes to other classes of material. Naturally brittle materials, such as ceramics (most famously glass), are difficult to toughen effectively. Most such techniques involve one of two mechanisms: to deflect the tip of a propagating crack, for instance by introducing natural weaknesses of limited extent, or to create carefully controlled residual stresses so that cracks from certain predictable sources will be forced closed, as in the case of toughened glass and pre-stressed concrete. Both mechanisms tend to soften the material somewhat, although most ceramics are quite hard to begin with. The least-brittle structural ceramics are silicon carbide (mainly by virtue of its high strength) and transformation-toughened zirconia. Fixed Partial Denture, or Bridge The word ceramic is derived from the Greek word κεραμικός (keramikos). ... This article is about the material. ... Stress is a measure of force per unit area within a body. ... This article is about the material. ... Prestressed concrete, invented by Frenchman Eugène Freyssinet in 1928, is a method for overcoming concretes natural weakness in tension. ... Look up hardness in Wiktionary, the free dictionary. ... Except where noted otherwise, data are given for materials in their standard state (at 25 Â°C, 100 kPa) Infobox disclaimer and references Silicon carbide (SiC) is a ceramic compound of silicon and carbon that is manufactured on a large scale for use mainly as an abrasive but also occurs in... Zirconia (ZrO2) is a white crystalline oxide of zirconium. ...


Generally, the brittle strength of a material can be increased by pressure. This happens as an example in the brittle-ductile transition zone at an approximate depth of 10 km in the Earth's crust, at which rock becomes less likely to fracture, and more likely to deform ductilely. In materials science, fracture toughness is a property which describes the ability of a material containing a crack to resist fracture, and is one of the most important properties of any material for virtually all design applications. ... This article is about pressure in the physical sciences. ... The brittle-ductile transition zone is the zone in the Earths crust, at an approximate depth of 10-15 km (18-20km) at which rock becomes less likely to fracture, and more likely to deform ductilely by creep. ... Earth cutaway from core to exosphere. ... Ductility is the physical property of being capable of sustaining large plastic deformations without fracture (in metals, such as being drawn into a wire). ...


Supersonic fracture is crack motion faster than the speed of sound in a brittle material. This phenomenon was first discovered by scientists from the Max Planck Institute for Metals Research in Stuttgart (Markus J. Buehler and Huajian Gao) and IBM Almaden Research Center in San Jose, California (Farid F. Abraham). Supersonic fractures are fractures faster than the speed of sound in a material. ... This page meets Wikipedias criteria for speedy deletion. ... , City Center seen from Weinsteige Road Castle Solitude The 1956 TV Tower The Weissenhof Estate in 1927 Stuttgart (IPA: []) is the capital of the state of Baden-Württemberg in southern Germany. ... Markus J. Buehler, German material scientist and engineer. ... Huajian Gao is an American materials scientist and engineer. ... The IBM Almaden Research Center, located near San Jose, California is one of IBMs research centers, specializing in both basic research in material science and applied research in things like computer storage, where many refinements and improvements were made in hard disc drive technology. ... San José – or its anglicised form San Jose – is the Spanish for Saint Joseph. ... Farid F. Abraham, US scientist. ...


  Results from FactBites:
 
Brittle - Wikipedia, the free encyclopedia (342 words)
A material is brittle if it is subject to fracture when subjected to stress i.e.
Naturally brittle materials, such as ceramics (most famously glass), are difficult to toughen effectively.
Most such techniques involve one of two mechanisms: to deflect the tip of a propagating crack, for instance by introducing natural weaknesses of limited extent, or to create carefully controlled residual stresses so that cracks from certain predictable sources will be forced closed, as in the case of toughened glass and pre-stressed concrete.
  More results at FactBites »

 
 

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