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A platform for research: civil engineering, architecture and urbanism
Optimal inspection planning and repair under random crack propagation
Graphical abstract Display Omitted
Highlights Accurate stochastic polynomial chaos crack propagation model employed. Number of inspections is a design variable, leading to discontinuous objective function with multiple local minima. Critical crack size at which repair is performed is a relevant design variable. Optimal inspection schedules highly sensitive w.r.t. costs of inspection and failure. Optimal inspection schedules highly sensitive w.r.t. level of loading.
Abstract Operation of damage-tolerant structures or components subject to random crack propagation requires constant monitoring by non-destructive inspections and systematic maintenance actions. Optimization of inspection schedules and repair strategies is a compromise between costs of inspections and repairs, and expected costs of failure. This paper advances the state of the art by: considering accurate polynomial chaos model of the random crack propagation process; considering number of inspections and crack repair size as design variables and; by performing sensitivity analysis of optimal inspection schedules and repair strategies with respect to the assumed costs of inspection and failure, as well as to the level of loading.
Optimal inspection planning and repair under random crack propagation
Graphical abstract Display Omitted
Highlights Accurate stochastic polynomial chaos crack propagation model employed. Number of inspections is a design variable, leading to discontinuous objective function with multiple local minima. Critical crack size at which repair is performed is a relevant design variable. Optimal inspection schedules highly sensitive w.r.t. costs of inspection and failure. Optimal inspection schedules highly sensitive w.r.t. level of loading.
Abstract Operation of damage-tolerant structures or components subject to random crack propagation requires constant monitoring by non-destructive inspections and systematic maintenance actions. Optimization of inspection schedules and repair strategies is a compromise between costs of inspections and repairs, and expected costs of failure. This paper advances the state of the art by: considering accurate polynomial chaos model of the random crack propagation process; considering number of inspections and crack repair size as design variables and; by performing sensitivity analysis of optimal inspection schedules and repair strategies with respect to the assumed costs of inspection and failure, as well as to the level of loading.
Optimal inspection planning and repair under random crack propagation
Gomes, Wellison J.S. (author) / Beck, André T. (author)
Engineering Structures ; 69 ; 285-296
2014-03-19
12 pages
Article (Journal)
Electronic Resource
English
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