Search results for "Least Square Fitting"

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Investigation of the crack tip stress field in a stainless steel SENT specimen by means of Thermoelastic Stress Analysis

2019

Abstract In this work a Thermoelastic Stress Analysis (TSA) setup is implemented to investigates the Thermoelastic and Second Harmonic signals on a fatigue loaded Single Edge Notched Tension (SENT) specimen made of stainless steel AISI 304L. Three load ratios are in particular applied, R=-1, 0, 0.1. The thermoelastic signal is used to evaluate the Stress Intensity Factor via two approaches, the Stanley-Chan linear interpolation method and the over-deterministic least-square fitting (LSF) method using the Williams’ series expansion. Regarding least-square fitting, an iterative procedure is proposed to identify the optimal crack tip position in the thermoelastic maps. The SIF and T-Stress are…

Materials scienceTension (physics)02 engineering and technologyMechanicsLinear interpolation021001 nanoscience & nanotechnologyStress (mechanics)Stress fieldT-StressSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchine020303 mechanical engineering & transportsThermoelastic damping0203 mechanical engineeringStress Intensity FactorHarmonicThermoelastic Stress Analysis Least Square Fitting Stress Intensity Factor Crack Closure T-StressThermoelastic Stress AnalysisLeast Square Fitting0210 nano-technologySeries expansionStress intensity factorCrack ClosureEarth-Surface Processes

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