Question: A rectangular rosette was installed in a limestone mine to determine two-dimensional state of strain. The following data were obtained before and after the

A rectangular rosette was installed in a limestone mine to determine two-dimensional state of strain. The following data were obtained before and after the development of pillars. Before development: AB AC AD = 10.00"; After development: AB 10.002"; AC = 9.996"; AD = 9.993" Based on the field measured results, determine: a) The two dimensional state of strain; b) Principal strains and the direction of major principal strain with x-axis. c) Plot the Mohr's Circle of strain and with its help determine the normal and shears strains occurring in an element inclined at an angle of 35 to the x-axis. Check with your results by analytical calculations also. 45 A B

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