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dilberg
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I'm having some trouble understanding residual stresses. I need to model a residual stress pattern into a finite element model. Can someone recommend books or references that has computations with residual stresses?
dilberg said:I am interested in effect of residual stresses on fatigue cracks. I have a parametric model of a fracture specimen, and I am trying to model residual stress pattern (due to prior yielding, probably due to fluctuating loads) as a predefined field as PerrenaII mentioned. From literature I gather that this could be done by modeling the residual stress pattern as a thermal strain field and I have been trying to this for a while now without much success. I am using ANSYS. I would be grateful for any help anyone can give me about this.
Residual stresses are internal stresses that remain in a material even after external loads have been removed. They can be caused by various factors such as manufacturing processes, thermal gradients, or mechanical deformation.
Residual stresses can have both positive and negative effects on material properties. They can increase the strength and hardness of a material, but they can also cause distortion, cracking, and premature failure if not properly managed.
There are several methods for measuring residual stresses, including X-ray diffraction, neutron diffraction, hole-drilling, and strain gauges. Each method has its own advantages and limitations, and the choice of method depends on the specific application and material.
Residual stresses can be controlled or reduced through various techniques such as heat treatment, shot peening, and mechanical surface treatments. These methods can help to redistribute or relax the stresses in a material, improving its overall performance.
Some highly recommended books and references for understanding residual stresses include "Residual Stresses in Engineering Materials" by A. Neimitz and J. B. Bressers, "Measurement of Residual and Applied Stress Using Neutron Diffraction" by K. L. Murty and G. S. Schajer, and "Introduction to Residual Stress" by J. R. Davis. Additionally, various research papers and journals in the field of materials science and engineering also provide valuable information on residual stresses.