منابع مشابه
Fractography Analysis of Monolithic Epoxy with Tailored Topography
The topographical features of fractured tensile, flexural, K1C, and impact specimens of monolithic epoxy have been studied and correlated with mechanical properties and surface features of samples before fracture. The topographical features studied include waviness (Wa), roughness average (Ra), root mean square value (Rq), and maximum roughness height (Rmax or Rz). As surface notches generate t...
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Wood is a porous three dimensional, hydroscopic, viscoelastic, anisotropic bio-polymer composite composed of an interconnecting matrix of cellulose, hemicelluloses and lignin with minor amounts of inorganic elements and organic extractives. Some, but not all, of the cell wall polymer hydroxyl groups are accessible to moisture and these accessible hydroxyls form hydrogen bonds with water. As the...
متن کاملLife Estimate of a Compressor Blade through Fractography
Failure analysis of fractured components provides some information about the causes and conditions of fracture. Fractography is an indispensable part of the failure analysis as it is usually the only means by which the failure mechanism can be established. By using fractography, some information such as component’s life, values of the stress intensity factor and the applied stress can be calcul...
متن کاملFractography of Polymer Composites: Current Status and Future Issues
With the increasing prevalence of polymer composites in engineering applications, invariably mechanical failures of these components are occurring. Key to addressing this is fractographic analysis; the examination of fracture surfaces to deduce information about the damage and failure of components. The fractography of isotropic materials, particularly metals, has been used as a tool for many y...
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In this research, efficiency of Iranian forest and rangeland decision making unit was assessed using non-parametric method. Inputs and outputs determined by field research and with applying a Delphi method the final input and output variables selected. Forty five wood-producing units (forestry plans) in three northern Iranian province were studied using Data Envelopment Analysis. The efficiency...
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ژورنال
عنوان ژورنال: Journal of the Society of Materials Science, Japan
سال: 1973
ISSN: 1880-7488,0514-5163
DOI: 10.2472/jsms.22.894