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

岩石中的褶皱是很常见的，但人们对它的理解仍然不完全。非常慢的自然应变率和极长时间内大应变的发展使直接的实验室建模变得不可能。理论治疗只能充分解释折叠的初始阶段。本研究试图通过适当选择本构关系的二维有限元模型来研究褶皱随时间的发展，从而绕过这些问题。然后，该模型对形状和应变分布的预测将与自然褶皱的数据进行比较。其目的是为从自然褶皱中获取有关变形历史和在缓慢的自然条件下变形的岩石的流变学信息提供标准。

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.