The problems for Sections 2.5-2.8 involve displacements, deformations, and strain states at a point in a structural or machine member. These quantities, as with then stress counterparts, are important in design and failure criteria.
A state of plane strain exists at a point in a beam, with the nonzero strain components ϵxx = −2000 μ, ϵyy = 400 μ, and ϵxy = −900 μ.
a. Determine the principal strains in the (x, y) plane and the orientation of the rectangular element on which they act. (See Example 2.10.)
b. Determine the maximum shear strain in the (x, y) plane and the orientation of the rectangular element on which it acts.
c. Show schematically the deformed shape of a rectangular element in the reference orientation, along with the original undeformed element. (See Example 2.10.)
Example 2.10.
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