Paradox of modelling curved faults revisited with general non-hypersingular stress Green’s functions

Paradox of modelling curved faults revisited with general non-hypersingular stress Green’s functions
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用一般非超奇异应力格林函数重新审视弯曲断层建模的悖论

DOI:
10.1093/gji/ggaa172
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发表时间:
2020
影响因子:
2.8
通讯作者:
Pierre. Romanet and Ryosuke Ando
Pierre. Romanet and Ryosuke Ando
中科院分区:
地球科学2区
文献类型:
--
作者:
Daisuke Sato;Pierre. Romanet and Ryosuke Ando

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在位错问题中,已知在原始光滑曲线和无穷小离散曲线之间会发生矛盾的不协调。为了解决这个矛盾,我们研究了一个非超奇异的积分核(称为应力绿色的功能),它描述了由位移不连续引起的应力场的表达。本文首先推导了一般二维和三维无限均匀弹性介质的非超奇异应力绿色函数的一个紧凑的替代表达式。接下来我们计算弯曲断层上的应力绿色函数,并重新讨论这个矛盾。我们发现,以前得到的非超奇异应力绿色的功能是不正确的弯曲故障,和光滑和无限小分段故障是等价的。他们的兼容性桥梁之间的差距差距的分析方法,具有弯曲的故障和数值方法,使用细分平坦补丁。
In a dislocation problem, a paradoxical discordance is known to occur between an original smooth curve and an infinitesimally discretized curve. To solve this paradox, we have investigated a non-hypersingular expression for the integral kernel (called the stress Green’s function) which describes the stress field caused by the displacement discontinuity. We first develop a compact alternative expression of the non-hypersingular stress Green’s function for general 2-D and 3-D infinite homogeneous elastic media. We next compute the stress Green’s functions on a curved fault and revisit the paradox. We find that previously obtained non-hypersingular stress Green’s functions are incorrect for curved faults, and that smooth and infinitesimally segmented faults are equivalent. Their compatibility bridges the gap between analytical methods featuring curved faults and numerical methods using subdivided flat patches.
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