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Stochastic Modeling of Composite Interfaces: Sensitivity ...
[Submitted on 11 Jun 2026 (v1), last revised 20 Jul 2026 (this v · 2026-06-12 · via stat updates on arXiv.org

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Abstract:To enable a numerical handling of uncertainties in composite structures, this work presents a stochastic finite-element framework aimed at improving the reliability assessment of aerospace composites, with particular attention to stiffener debonding. By representing interface variability between laminate parts with spatially correlated random fields, the method aims at considering scattering effect at a higher scale of simulation and testing. A parametric study carried out on standardized Mode I and Mode II fracture tests reveals that the correlation length is the primary driver of observed variability, while the regularity of the covariance kernel has only a marginal impact. To guarantee industrial relevance, we demonstrate that this key parameter can be extracted from experimental fracture data using an Approximate Bayesian Computation approach. The proposed methodology therefore offers a robust route to high-fidelity virtual testing and to the predictive management of uncertainties in the design of damage-tolerant composite airframes.

Submission history

From: Elton Donfack Siewe [view email]
[v1] Thu, 11 Jun 2026 07:53:53 UTC (9,122 KB)
[v2] Mon, 20 Jul 2026 12:11:56 UTC (9,941 KB)