Conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicos
When a mechanical component fails, somehow or other, the applied load becomes equal or greater than the fail load. Taking in mind this principle and considering the statistical variability of both, applied stress and strength, the concept of failure probability is catched. Assuming that both strengh...
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1996-05-01
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doaj-82fedd4609314e978564e7c4b40ac0d82020-11-25T00:49:55ZengUniversidad Nacional de ColombiaIngeniería e Investigación0120-56092248-87231996-05-01034152222124Conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicosHéctor HernándezWhen a mechanical component fails, somehow or other, the applied load becomes equal or greater than the fail load. Taking in mind this principle and considering the statistical variability of both, applied stress and strength, the concept of failure probability is catched. Assuming that both strenght and stress have a normal distribution, then failure probability increases with: (a) the reduction of the difference between mean value of strenght and stress, (b) the increase of strenght and stress variance. Defects introduced by manufacturing and defects introduced into service such as voids, pits, inclusions or cracks can increase the failure probability and decrease the reliability. This is due to the' increase in the overlapping between the two distributions, of stress and strenght. This depends on failure mode such as plastic collapse, britle fracture and failure by fatigue. When the failure mode is by slow crack growth, reliability can be improved by using of nondestructive inspection methods to detect subcritical crack sizes.https://revistas.unal.edu.co/index.php/ingeinv/article/view/24815ingeniería mecánicaprobabilidad de fallas |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Héctor Hernández |
spellingShingle |
Héctor Hernández Conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicos Ingeniería e Investigación ingeniería mecánica probabilidad de fallas |
author_facet |
Héctor Hernández |
author_sort |
Héctor Hernández |
title |
Conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicos |
title_short |
Conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicos |
title_full |
Conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicos |
title_fullStr |
Conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicos |
title_full_unstemmed |
Conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicos |
title_sort |
conceptos de probabilidad y estadística en análisis de fallas de componentes mecánicos |
publisher |
Universidad Nacional de Colombia |
series |
Ingeniería e Investigación |
issn |
0120-5609 2248-8723 |
publishDate |
1996-05-01 |
description |
When a mechanical component fails, somehow or other, the applied load becomes equal or greater than the fail load. Taking in mind this principle and considering the statistical variability of both, applied stress and strength, the concept of failure probability is catched. Assuming that both strenght and stress have a normal distribution, then failure probability increases with: (a) the reduction of the difference between mean value of strenght and stress, (b) the increase of strenght and stress variance. Defects introduced by manufacturing and defects introduced into service such as voids, pits, inclusions or cracks can increase the failure probability and decrease the reliability. This is due to the' increase in the overlapping between the two distributions, of stress and strenght. This depends on failure mode such as plastic collapse, britle fracture and failure by fatigue. When the failure mode is by slow crack growth, reliability can be improved by using of nondestructive inspection methods to detect subcritical crack sizes. |
topic |
ingeniería mecánica probabilidad de fallas |
url |
https://revistas.unal.edu.co/index.php/ingeinv/article/view/24815 |
work_keys_str_mv |
AT hectorhernandez conceptosdeprobabilidadyestadisticaenanalisisdefallasdecomponentesmecanicos |
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