WORKPLACE STRESS ESTIMATION METHOD BASED ON MULTIVARIATE ANALYSIS OF PHYSIOLOGICAL INDICES

2012 ◽  
Keyword(s):  
Multivariate Analysis ◽  
Estimation Method ◽  
Workplace Stress ◽  
Physiological Indices ◽  
Stress Estimation

S1601-2-2 Stress estimation method based on multivariate analysis of physiological indices

2009 ◽  
Vol 2009.5 (0) ◽  
pp. 181-182
Author(s):  
Hirohito IDE ◽  
Masahiko OSADA ◽  
Guillaume LOPEZ ◽  
Masaki SHUZO ◽  
Jean-Jacques DELAUNAY ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Estimation Method ◽  
Physiological Indices ◽  
Stress Estimation

scholarly journals An Estimation Method of Intellectual Work Performance by Using Physiological Indices

2017 ◽  
Author(s):  
Shutaro Kunimasa ◽  
◽  
Kyoichi Seo ◽  
Hiroshi Shimoda ◽  
Hirotake Ishii ◽  
...  
Keyword(s):  
Work Performance ◽  
Estimation Method ◽  
Intellectual Work ◽  
Physiological Indices

scholarly journals Local stress fields in solids estimated by acoustical emission method

2021 ◽  
Vol 2103 (1) ◽  
pp. 012064
Author(s):  
V L Hilarov ◽  
E E Damaskinskaya
Keyword(s):  
Time Series ◽  
Acoustic Emission ◽  
Stress Field ◽  
Estimation Method ◽  
Local Stress ◽  
Stress Fields ◽  
Emission Method ◽  
Macroscopic Fracture ◽  
Stress Estimation ◽  
Kinetic Concept

Abstract Based on the Zhurkov’s kinetic concept of solids’ fracture a local internal stress estimation method is introduced. Stress field is computed from the time series of acoustic emission intervals between successive signals. For the case of two structurally different materials the time evolution of these stresses is examined. It is shown that temporal changes of these stresses’ accumulation law may serve as a precursor of incoming macroscopic fracture.

Reference Stress Estimation for Anisotropic Materials Using Linear Elastic Finite Element Results

2020 ◽  
Author(s):  
Brent Scaletta ◽  
Richard Green
Keyword(s):  
Finite Element ◽  
Turbine Blades ◽  
Estimation Method ◽  
Anisotropic Materials ◽  
Remaining Useful Life ◽  
Material Behavior ◽  
Initial Stress State ◽  
Reference Stress ◽  
Stress Estimation ◽  
Path Dependent

Abstract Components in the hot section of a gas turbine engine experience extended high temperature dwells and cycles composed of multiple starts, changes in load, and variable duration. These loading profiles can lead to damage from cyclic viscoplasticity which is heavily path dependent as dwell stress, yield strength, and stress range change constantly during operation. Since an accurate prediction of accumulated damage is critical to managing an engine, reduced order methods for tracking material behavior over complex operation cycles are necessary tools to help avoid unplanned down time and optimize cost over the operational period. One method for tracking the material behavior during path dependent cyclic viscoplasticity requires the use of reference stress. Reference stress is a bulk representative stress that can be used in conjunction with various lifing methodologies to determine component durability. Previous papers provided a method for calculating reference stress for isotropic materials using limit load estimation. The goal of this paper is to extend these methodologies to a reference stress estimation method for anisotropic materials to estimate life for single crystal turbine blades. Derived equations will be shown and results from simple Finite Element (FE) test cases will be discussed to demonstrate the accuracy of the anisotropic reference stress estimation. Once reference stress is obtained, the long term forward creep stress of a component can be estimated for any given initial stress state. This approach can be used to calculate damage during shakedown resulting from redistribution and relaxation due to plasticity and creep, which can be critical for accurately predicting remaining useful life and optimizing engine management.

127 Analytical Study on Stress Estimation Method by Dynamic Hardness

2001 ◽  
Vol 2001.14 (0) ◽  
pp. 53-54
Author(s):  
Satoshi HANAWA ◽  
Masahiro ISHIHARA ◽  
Tsuneo Takahashi
Keyword(s):  
Analytical Study ◽  
Estimation Method ◽  
Dynamic Hardness ◽  
Stress Estimation

1438 Thermal stress estimation method for structural integrity by Design of Experiment considering the dispersion

2005 ◽  
Vol 2005.1 (0) ◽  
pp. 295-296
Author(s):  
Masakazu Jimbo ◽  
Naoto Kasahara ◽  
Hiroshi Shibamoto ◽  
Kazuhiko Inoue
Keyword(s):  
Thermal Stress ◽  
Design Of Experiment ◽  
Structural Integrity ◽  
Estimation Method ◽  
Stress Estimation
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