Numerical Modelling of Stochastic Fatigue Damage Accumulation in Thick Composites
نویسندگان
چکیده
In an earlier research, experimental evidence was given on the ability to use Piezo Wafer Active Sensors and acousto-ultrasonics monitor accumulation of fatigue damage in a thick composite structure. As next step, numerical models are investigated as they aid further understanding governing phenomena quantification accumulated damage. However, suffer from high computational demands, due mesh density, stochastic nature crack initiation combination propagation cracks.The Polynomial Chaos Expansion (PCE) method is employed efficiently make meta and, with these models, account for behaviour formation delaminations. The thus allow predicting overall effect accumulations within certain bounds uncertainty. This aids accumulation, hence allowing severity estimation based results.The input PCE 2D Finite Element (FE) model. Cracks delaminations generated using Random Variables (RV) describing geometrical position length orientation. Moreover, number cracks randomized well. necessary remeshing done automatically, completely automated simulation large FE simulations feed model.Several Quantities Interests (QoI) defined tested against their sensitivity increasing amount accumulation. A global analysis used identify importance each Variables. variables low can be eliminated analysis, improving efficiency.
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ژورنال
عنوان ژورنال: Lecture notes in civil engineering
سال: 2021
ISSN: ['2366-2565', '2366-2557']
DOI: https://doi.org/10.1007/978-3-030-64908-1_72