Searched for: author%3A%22Raimondo%2C+A.%22
(1 - 11 of 11)
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Raimondo, A. (author), Bisagni, C. (author)
This paper presents a numerical approach for investigating fatigue delamination propagation in composite stiffened panels loaded in compression in the post-buckling field. These components are widely utilized in aerospace structures due to their lightweight and high-strength properties. However, fatigue-induced damage, particularly delamination...
journal article 2024
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Paz Mendez, J. (author), Raimondo, A. (author), Bisagni, C. (author)
This study aims at better understanding the damage tolerance of stiffened composite panels subjected to fatigue loads in the post-buckling regime. Ten single-stringer hat-stiffened specimens with an initial delamination between the skin and the stringer foot were manufactured, and then tested under quasi-static and fatigue loads in post...
journal article 2023
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Bisagni, C. (author), Raimondo, A. (author), Atanasovska, I. (author), Milic, M. (author), Troian, R. (author), Frulla, G. (author), Polla, A. (author), Cora, N. (author), Bekci, M. L. (author)
In this paper, a comparison between six finite element models of a representative wing structural component performed in the context of Optimised Design for Inspection (ODIN) project of the European Cooperation in Science and Technology (COST) is presented. Six partners from six different countries involved in the project received the drawing...
journal article 2022
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Raimondo, A. (author), Dávila, Carlos G. (author), Bisagni, C. (author)
This paper evaluates the capabilities of the recently developed CF20 cohesive fatigue model, which can predict crack initiation as well as the rates of crack propagation by relying on intrinsic relationships between a stress-life diagram and its corresponding Paris law. The model is validated here using a partially reinforced double...
journal article 2022
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Raimondo, A. (author), Paz Mendez, J. (author), Bisagni, C. (author)
The fatigue damage tolerance of a composite stiffened structure in post-buckling conditions is experimentally investigated in this work. Single-stringer specimens with an initial delamination, artificially created during the manufacturing process, are tested under cyclic compressive load. Six nominally identical specimens are manufactured: two...
conference paper 2021
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Raimondo, A. (author), Urcelay Oca, I. (author), Bisagni, C. (author)
The standard experimental procedures for determining the interlaminar fracture toughness are designed for delamination propagation in unidirectional specimens. However, in aerospace structural components, delamination usually occurs between plies at different orientations resulting in different damage mechanisms which can increase the value...
journal article 2021
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Raimondo, A. (author), Bisagni, C. (author)
The fatigue life prediction of post-buckled composite structures represents still an unresolved issue due to the complexity of the phenomenon and the high costs of experimental testing. In this paper, a novel numerical approach, called “Min-Max Load Approach”, is used to analyze the behavior of a composite single-stringer specimen with an...
journal article 2020
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Raimondo, A. (author), Doesburg, S.A. (author), Bisagni, C. (author)
In this work, an approach based on the Virtual Crack Closure Technique, included in the commercial finite element code ABAQUS, is adopted to study the propagation of delamination in composite structures under quasi-static and fatigue loads. The methodology, originally capable of simulating only delamination under quasi-static loads, has...
journal article 2020
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Raimondo, A. (author), Bisagni, C. (author)
An approach based on the cohesive zone model for analyzing delamination in composite laminates under cyclic fatigue loading is presented. The proposed technique, called “min-max load approach,” is able to dynamically capture the local stress ratio during the progression of delamination. The possibility to know the local stress ratio is relevant...
journal article 2020
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Raimondo, A. (author), Bisagni, C. (author)
This paper focuses on a novel numerical formulation based on cohesive elements and S-N diagram to simulate fatigue-driven delamination in composite laminates. The constitutive model adopts a two-parameters heuristic equation, which coefficients are evaluated using an idealization of the S-N diagram rather than the more commonly used Paris law....
conference paper 2019
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Raimondo, A. (author), Bisagni, C. (author)
An approach based on the cohesive zone model for analyzing fatigue-driven delamination in composite structures under cyclic loading is presented. The proposed technique, called “Min-Max Load Approach”, is able to dynamically capture the local stress ratio during the evolution of damage. The possibility to know the local stress ratio is relevant...
conference paper 2019
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