contributor author | Bhattacharya, Chandrachur | |
contributor author | Dharmadhikari, Susheel | |
contributor author | Basak, Amrita | |
contributor author | Ray, Asok | |
date accessioned | 2022-02-05T22:03:41Z | |
date available | 2022-02-05T22:03:41Z | |
date copyright | 3/11/2021 12:00:00 AM | |
date issued | 2021 | |
identifier issn | 2689-6117 | |
identifier other | aldsc_1_4_041003.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4276833 | |
description abstract | Fatigue failure occurs ubiquitously in mechanical structures when they are subjected to cyclic loading well below the material’s yield stress. The tell-tale sign of a fatigue failure is the emergence of cracks at the internal or surface defects. In general, a machinery component has a finite fatigue life based on the number of cycles, it can sustain before a fracture occurs. However, the estimated life is generally conservative and often a large factor of safety is applied to make the component fail-safe. From the perspective of better utilization of a machinery component, it is, however, desirable to have maximum usage of the component without a catastrophic failure. It is, therefore, conducive to have a measure that can capture precursors to failure to facilitate active diagnosis of the machinery health. In this study, a precursor detection method is developed upon modifications of probabilistic finite state automata (PFSA). The efficacy of the proposed method is demonstrated on cold-rolled AL7075-T6 notched specimens in a computer-instrumented and computer-controlled fatigue testing apparatus. The results show that the proposed method is capable of detecting the emergence of cracks (at ∼95% accuracy) and also can capture precursors with good fidelity. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Early Detection of Fatigue Crack Damage in Ductile Materials: A Projection-Based Probabilistic Finite State Automata Approach | |
type | Journal Paper | |
journal volume | 1 | |
journal issue | 4 | |
journal title | ASME Letters in Dynamic Systems and Control | |
identifier doi | 10.1115/1.4050183 | |
journal fristpage | 041003-1 | |
journal lastpage | 041003-5 | |
page | 5 | |
tree | ASME Letters in Dynamic Systems and Control:;2021:;volume( 001 ):;issue: 004 | |
contenttype | Fulltext | |