Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, Va.
For the purposes of our discussion here, we define an “unconstrained” case to be a unidirectional lamina. “Constraint stresses,” then, will be those stresses that owe their existence to the constraints exerted by off-axis plies, which are laminated to 0° laminae on the response of those 0° laminae. In the next few paragraphs we will discuss the development of damage during fatigue loading in 0° plies and attempt to extend the discussion to the response of those plies when embedded in a laminate under the influence of these constraint stresses.
Paper ID: CTR10714J