Nonlinear mechanical response of supercooled melts under applied forces

过冷熔体在外力作用下的非线性机械响应

• 批准号: 173397038
• 负责人: Professor Dr. Matthias Fuchs
• 金额: --
• 依托单位: Arbeitsgruppe Theorie der weichen Materie
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/173397038?language=en
• 关键词: Nonlinear; mechanical; response; supercooled; melts

We study the nonlinear response of supercooled melts and glass formers to time-dependent, strong applied stresses. To discover whether and when metallic and colloidal glasses yield homogeneously or locally under applied stress, a microscopic theory is developed, based on the integration through transients (ITT) approach in combination with a generalization of inhomogeneous mode-coupling theory (i-MCT). Spatially dependent elastic and plastic deformations, yielding and flow are studied, and microscopic mechanisms leading to strain localization are investigated, to provide insights into the transport mechanisms in melts and amorphous solids far from equilibrium.

我们研究了过冷熔体和玻璃形成者的非线性响应随时间的变化，强大的外加应力。为了发现金属和胶体玻璃是否以及何时在施加的应力下均匀或局部屈服，基于瞬态积分（ITT）方法结合非均匀模式耦合理论（i-MCT）的概括，发展了一种微观理论。空间相关的弹性和塑性变形，屈服和流动进行了研究，并导致应变局部化的微观机制进行了调查，提供深入了解熔体和非晶固体远离平衡的传输机制。