The origin of tablet boudinage: Results from experiments using power–law rock analogs
The origin of tablet boudinage: Results from experiments using power–law rock analogs
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布丁格片的起源：使用 powerâlaw 岩石类似物进行实验的结果
DOI：
10.1016/j.tecto.2011.07.013
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发表时间：
2011
期刊：
影响因子：
2.9
通讯作者：
Gutiérrez-Alonso
中科院分区：
文献类型：
--
作者：
Zulauf;Zulauf;Gutiérrez-Alonso
我们使用幂律粘性橡皮泥（n=ca）。7)作为岩石模拟物，模拟岩石在位错蠕变和脆性断裂过程中的损伤。垂直于主要缩短方向Z方向的活性塑层在活性较低的塑层基质内进行了大量纯扁平化。变形样品的计算机层析分析显示，损伤是由粘滞颈的初始阶段引起的，随后是沿先前形成的颈部的拉伸破坏。由此产生的糖衣在平面视图中显示多边形形状，被称为“平板糖衣”（与方形或矩形巧克力糖衣形成对比）。平面-视图长轴与短轴之比R为1.2 ~ 2.6。片剂结合部的多边形、非等距形状可以用同心和径向拉伸断裂的强相互作用来解释。随着层厚的增加，boutin片的平均直径Hi Wa增加，而botin片的数量N减少。渐进式有限应变导致边界数增加和平均直径减小。结合体厚度Hf与初始层厚Hi基本一致，而长径比（Wd=Wa/Hf）随层厚和有限应变的增加而减小。从所有实验中得到的平均wd值从约4到约11。本论文中所描述的片剂还没有从自然露头中得到描述。究其原因，可能是单纯的压扁应变在自然界中并不常见，而对片剂结合物的表征和评价需要进行三维几何分析，这在自然界中是一项困难的任务。
We used power–law viscous plasticine (n=ca. 7) as a rock analog to simulate boudinage of rocks undergoing dislocation creep and brittle fracture. A competent plasticine layer, oriented perpendicular to the main shortening direction, Z, underwent bulk pure flattening inside a less competent plasticine matrix. Computer tomographic analyses of the deformed samples revealed that boudinage results from an initial phase of viscous necking followed by tensile failure along the previously formed necks. The resulting boudins display a polygonal shape in plan-view and are referred to as ‘tablet boudins’ (in contrast to the square to rectangular shaped chocolate-tablet boudins). The ratio between the plan-view long and short axis, R, ranges from 1.2 to 2.6. The polygonal, non-isometric shape of the tablet boudins can be explained by the strong interaction of concentric and radial tensile fractures. With increasing layer thickness, Hi, the mean diameter of the boudin tablets, Wa, increases, while the number of boudins, N, decreases. Progressive finite strain results in a higher number of the boudins and a smaller mean diameter. The thickness of the boudins, Hf, is almost the same as the initial layer thickness, Hi, while the aspect ratio (Wd=Wa/Hf) decreases with layer thickness and finite strain. The mean Wdvalues obtained from all experiments span from ca. 4 to ca. 11. Tablet boudins, described in the present paper, have yet not been described from natural outcrops. The reasons might be that pure flattening strain is not common in nature, and the characterization and evaluation of tablet boudins requires geometrical analysis in three dimensions, which is a difficult task when such structures occur in nature.
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褶皱岩石中发育的布丁纳吉图案和表观拉伸线理
DOI：
10.1086/628012
发表时间：
1974
期刊：
The Journal of Geology
影响因子：
--
作者：
D. Sanderson
通讯作者：
D. Sanderson
布丁纳奇结构：基于弹塑性有限元模拟的一些新解释
影响因子：
3.1
作者：
G. Lloyd;C. Ferguson
通讯作者：
C. Ferguson
影响因子：
3.1
作者：
GHOSH, SK
通讯作者：
GHOSH, SK
三维屈曲过程中的应力定向和断裂：葡萄牙西南部折叠浊积岩巧克力片结构的数值模拟及其应用
影响因子：
2.9
作者：
J. Reber;S. Schmalholz;J. Burg
通讯作者：
J. Burg
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影响因子：
3.1
作者：
R. Weijermars
通讯作者：
R. Weijermars