Internal stresses in heat-treated axles

Acoustic Interactions with Internal Stresses in Metals

It became evident at the residual stress meeting in San Antonio last yearl that it is necessar2 to restate the definitions for internal stresses. In general, we are talking about three kinds of residual stresses as shown in Table I. The one that's called the first kind of internal stress ranges over millimeters or centimeters {or long range internal stress) and can be identified by x-rays throu...

Internal Stress Plasticity Due to Chemical Stresses

Internal stress plasticity occurs when a small external stress biases internal mismatch strains produced by, e.g., phase transformation or thermal expansion mismatch. At small applied stresses, this deformation mechanism is characterized by a deformation rate which is proportional to the applied stress and is higher than for conventional creep mechanisms. In this work, we demonstrate the operat...

A Numerical Modeling for Natural Convection Heat Transfer in Porous Media With Generated Internal Heat Sources

In this paper a numerical method is used to study the unsteady state natural convection heat transfer within a confined porous media with uniform internal heat generation. The governing equations based on the Darcy model and Bossiness approximations are solved, using the finite difference Alternating Direction Implicit (ADI) method. The developed program was used to simulate natural convection ...

Interplay of internal stresses, electric stresses, and surface diffusion in polymer films.

We investigate two destabilization mechanisms for elastic polymer films and put them into a general framework: first, instabilities due to in-plane stress and, second, due to an externally applied electric field normal to the film's free surface. As shown recently, polymer films are often stressed due to out-of-equilibrium fabrication processes such as, e.g., spin coating. Via an Asaro-Tiller-G...

Determination of Internal Stresses in Lightweight Metal Matrix Composites