The nonzero stress components relative to axes (x, y, z) are σxx = -90 MPa, σyy = 50 MPa, and σxy = 6 MPa.

a. Determine the principal stresses, σ1≥ σ2≥ σ3

b. Calculate the maximum shear stress.

c. Calculate the octahedral shear stress.

d. Determine the angle between the x axis and the X axis, where X is in the direction of the principal stress σ1.

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.

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