pete384lab4 - F racturology Pete493 Project 4 Date...

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Fracturology Pete493 Project 4 Date Conducted 10/15/09 Date Submitted 10/22/09 Objective To understand the concept of principle compressive stress needed to cause failure. To understand the concept of internal friction angle and the angle of failure to the major stress plane. Introduction Understanding the science of fractures is necessary to interpret, among things, cuttings’ angles. When trying to interpret the fracture angle of a cutting, the relationship of the fracture angle and the properties of the material are as important as the forces exerted on the material. Compression can be due to overburden or by cement matrix, the bonds that hold particles together can be forced to shear by removing the forces that originally kept the particle in a state of equilibrium on one plane or by increasing the forces on another plane. The cross section of a three dimensional body of a material has three components if stress that that are acting on the body. The normal stresses in both the x and y directions and the shear stress component that has a reaction along a line that has a relationship to an angle running through the body (maximum allowable shear stress or maximum principal stress). On a perpendicular axis to the
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This note was uploaded on 10/27/2009 for the course PETROLEUM 493 taught by Professor Hayatovodi during the Spring '09 term at University of Louisiana at Lafayette.

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pete384lab4 - F racturology Pete493 Project 4 Date...

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