Single-Layer Buckle Folding in Non-Linear Fluids and Rocks

非线性流体和岩石中的单层卡扣折叠

• 批准号: 8804670
• 负责人: Peter Hudleston
• 金额: $ 6.91万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8804670&HistoricalAwards=false
• 关键词: Single; Layer; Buckle; Folding; Non

Folding in rocks is very common, yet is still imperfectly understood. Very slow natural strain rates and development of large strains over extremely long times make direct laboratory modeling impossible. Theoretical treatment only adequately account for initial stages of folding. This research will attempt to circumvent these problems by using a two-dimensional finite- element model with appropriate choice of constitutive relation- ships to study development of folds with time. Predictions of shape and strain distribution resulting from the model will then be compared with data on natural folds. The aim is to provide criteria for gaining information from natural folds about deformational history and about rheology of rocks deformed under slow natural conditions.

岩石的折叠现象非常常见，但人们对它的了解仍然不完全。 非常慢的自然应变率和在极长的时间内形成大应变使得直接的实验室建模变得不可能。 理论处理只能充分解释折叠的初始阶段。 本研究将尝试通过使用二维有限元模型并适当选择本构关系来研究褶皱随时间的发展，从而规避这些问题。 然后将模型得出的形状和应变分布预测与自然褶皱的数据进行比较。 目的是为从自然褶皱中获取有关变形历史和缓慢自然条件下变形岩石流变学的信息提供标准。