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The Larson–Miller model is used for experimental tests so that results at certain temperatures and stresses can predict rupture lives of time spans that would be impractical to reproduce in the laboratory. Expanding the equation as a Taylor series makes the relationship easier to understand. Only the first terms are kept.
The Hollomon–Jaffe parameter (HP), also generally known as the Larson–Miller parameter, [1] describes the effect of a heat treatment at a temperature for a certain time. [2] This parameter is especially used to describe the tempering of steels, so that it is also called tempering parameter.
The concept was first developed by John D. Lawson in a classified 1955 paper [1] that was declassified and published in 1957. [2] As originally formulated, the Lawson criterion gives a minimum required value for the product of the plasma (electron) density n e and the " energy confinement time " τ E {\displaystyle \tau _{E}} that leads to net ...
In the equation shown on this page, it shows the larson-miller parameter to be the activation energy over the gas constant and then has log of the time on the other side. Up until this point natural log was being used, in that case it should be the natural log of time.
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The book covers various subjects, including bearing and shear stress, experimental stress analysis, stress concentrations, material behavior, and stress and strain measurement. It also features expanded tables and cases, improved notations and figures within the tables, consistent table and equation numbering, and verification of correction ...
Modern procedures for critical plane analysis trace back to research published in 1973 in which M. W. Brown and K. J. Miller observed that fatigue life under multiaxial conditions is governed by the experience of the plane receiving the most damage, and that both tension and shear loads on the critical plane must be considered.
[1] The theory was extended to map chemical space with molecular assembly trees, demonstrating the application of this approach in drug discovery, [ 2 ] in particular in research of new opiate -like molecules by connecting the "assembly pool elements through the same pattern in which they were disconnected from their parent compound(s)".