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QUESTION 130 marks) a) Add the following 2-D rock stress states (i.e. elements A and B), and find the principal stresses of the resultant stress state and their directions relative to x - y coordinate system (all the stress values are in MPa) (25 Marks) b) What is the summation value of all normal stresses after the following steps a. rotation of 152" Anti-clock-wise element A b. rotation of 225º clock-wise element B c. Add both elements A and B) (5 Marks) 10 130 609 309 (A) (B) 30 14 30 10
stresses of the resultant stress state and their directions relative to x - y coordinate system (all the stress values are in MPa) (25 Marks) b) What is the summation value of all nomal stresses after the following steps a. rotation of 152" Anti-clock-wise element A b. rotation of 225° clock-wise element B c. Add both elements A and B) (5 Marks) 602 309 90 (A) (B) 30 30 14 10 Х 909 459