Participant Support for IUTAM Symposium Material Instabilities and the Effect of Microstructures

IUTAM 研讨会材料不稳定性和微观结构影响的参与者支持

• 批准号: 9909298
• 负责人: Stelios Kyriakides
• 金额: $ 0.5万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2001-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909298&HistoricalAwards=false
• 关键词: Participant; Support; IUTAM; Symposium; Material

Instability plays a crucial role in the design of solids and structures as it often limits their performance from their manufacturing stage to their installation and operation. The design of more effcient structures motivated the enormous progress in structural stability acheived during the period of 1940-70. More recently, the ares has received a new impetus form instabilities at the material level. This is partly due to the advent of new materilas but, also due to continuing efforts to develop constitutive laws and failure criteria for more conventional materials. Like in the more classical problems, such instabilities are governed by non linear interaction of geometry and material properties which now are related to the microstructure of the material. Examples of this class of relatively new problems are kinking failure in fiber composites in compression and in wood, stress induced transformations in shape memory alloys, shear licalizaion in metal mono- and polycrystals,and localization of deformation in compressed cellular materials. Similar problems are also known to govern the behavior of granular materials, rocks, concrete and several polymers.

不稳定性在固体和结构的设计中起着至关重要的作用，因为它通常会限制其从制造阶段到其安装和操作的性能。 更效率的结构的设计促进了1940 - 70年期间实现的结构稳定性的巨大进步。 最近，ARES在物料级别获得了新的动力表格不稳定性。 这部分是由于新的Materilas的出现，但也是由于不断努力制定构成法律和更常规材料的失败标准。 像在更古典的问题中一样，这种不稳定性受几何和材料特性的非线性相互作用的控制，这些材料和材料特性与材料的微观结构有关。 这类相对新问题的例子是压缩和木材中纤维复合材料中的扭结失败，应力诱导的形状记忆合金中的转化，金属单晶和多晶中的剪切乳肌以及压缩细胞材料中变形的定位。 还知道类似的问题可以控制颗粒材料，岩石，混凝土和几种聚合物的行为。