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Anderson's theory of faulting, devised by Ernest Masson Anderson in 1905, is a way of classifying geological faults by use of principal stress. [1] [2] A fault is a fracture in the surface of the Earth that occurs when rocks break under extreme stress. [3] Movement of rock along the fracture occurs in faults.
Anderson's theory of faulting; Aseismic creep; Fault block – Large blocks of rock created by tectonic and localized stresses in Earth's crust; Fault scarp – Small vertical offset on the ground surface; Joint – Type of fracture in rock; Mitigation of seismic motion; Mountain formation – Geological processes that underlie the formation of ...
Anderson's classic analysis of faulting serves as a simple application of paleostress analysis in terms of principal components of stress. [1] Zoback and Zoback's (1986) synthesis of contemporary stress measurements in North America [2] was subsequently expanded to a global study [3] which continues as the World Stress Project.
Ernest Masson Anderson FRSE FGS (1877–1960) was a Scottish geologist. Ernest was born in Falkirk and educated at Falkirk High School and the High School of Dundee before attending the University of Edinburgh , where he received a B.Sc. in 1897, an M.A. in mathematics and natural philosophy in 1898, and a D.Sc. in 1933.
The reduced stress tensor is a mathematical computation approach to determining the three principal axes and the stress ratio, totally four independent unknowns, calculated as eigenvectors and eigenvalue respectively, so that this method is more complete and accurate than the mentioned graphical approaches.
The stress needed to fracture bulk glass is around 100 MPa (15,000 psi). The theoretical stress needed for breaking atomic bonds of glass is approximately 10,000 MPa (1,500,000 psi). A theory was needed to reconcile these conflicting observations.
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This type of stress may be called (simple) normal stress or uniaxial stress; specifically, (uniaxial, simple, etc.) tensile stress. [13] If the load is compression on the bar, rather than stretching it, the analysis is the same except that the force F and the stress σ {\displaystyle \sigma } change sign, and the stress is called compressive ...