【摘 要】
：
Materials are often characterized in terms of their toughness, though more than one definition of toughness exists.Likely the most widely recognized means of defining material toughness,denoted here a
【机 构】
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Laboratory of Advanced Polymers & Optimized Materials (LAPOM),Department of Materials Science and En
【出 处】
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Seventh International Symposium On Engineering Plastics (第七届
论文部分内容阅读
Materials are often characterized in terms of their toughness, though more than one definition of toughness exists.Likely the most widely recognized means of defining material toughness,denoted here as , is by the area under the stress vs.strain curve from a tensile test.Another important feature describing the nature of materials is that property known as brittleness, which has for a long time been much less quantitatively understood.We use a quantitative definition of brittleness provided in 2006: W.Brostow, H.E.Hagg Lobland & M.Narkis, Sliding wear,viscoelasticity and brittleness of polymers, J.Mater.Res.2006, 21, 2422-2428.We demonstrate the existence of a relationship between and brittleness B, valid for polymers with a very wide range of chemical structures and properties, for some polymer-based composites, and also for steel and aluminum.We provide an equation relating toughness to brittleness, while for polymers we mark the determining influence of chemical structures on the properties B and.
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