Searched for: subject%3A%22Damage%255C+mechanics%22
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Maggioli, Filippo (author)
Finite Element Methods (FEMs) are widely employed for damage simulation in composites, with the Cohesive Zone Model (CZM) being particularly favored for its robustness and scalability. Despite the CZM's mesh-dependent nature, the Discontinuous Galerkin Cohesive Zone Model (DG/CZM) formulation allows for relatively arbitrary crack propagation...
master thesis 2024
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Koutsounanos, Efthymios (author)
Ceramic matrix composites (CMCs) are advanced materials that consist of a ceramic matrix reinforced with a high-strength, high-stiffness material, such as carbon fibers. They offer excellent thermal and chemical stability while exhibiting low weight and exceptional mechanical properties. A novel CMC material is the C/C-SiC produced with 2/2...
master thesis 2023
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Ghahremani, Parsa (author), Najafabadi, Mehdi Ahmadi (author), Alimirzaei, Sajad (author), Fotouhi, M. (author)
This study investigates the mechanical behavior and damage mechanisms of thin-walled glass/epoxy filament wound tubes under quasi-static lateral loads. The novelty is that the tubes are reinforced in critical areas using strip composite patches to provide a topology-optimized tube, and their damage mechanisms and mechanical performance are...
journal article 2023
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Pan, Tanbo (author), Zheng, Yonglai (author), Zhou, Y. (author), Luo, Wenbin (author), Xu, Xubing (author), Hou, Chenyu (author), Zhou, Yujue (author)
This study presents a damage pattern recognition approach for corroded steel beams strengthened by CFRP anchorage system based on acoustic emission clustering analysis. The proposed method includes four steps: acoustic emission signal acquisition, feature extraction, clustering analysis, and damage pattern recognition. Four corroded beams...
journal article 2023
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Ashcroft, Ian (author), Pascoe, J.A. (author)
The fatigue behavior of an adhesively bonded joint is of key importance to its long-term structural integrity. However, the complex stress distribution inside a bonded joint does not make it easy to evaluate the fatigue behavior. This chapter discusses the various approaches that have been developed for predicting the fatigue behavior of...
book chapter 2023
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Taumaturgo Mororo, L.A. (author), Poot, A. (author), van der Meer, F.P. (author)
The Thick Level Set method (TLS) is an approach for non-local damage modeling in which the damage evolution is linked to the movement of a damage front described with the level set method. More recently, a new version of the TLS, designated as the TLSV2, has been proposed as a new concept for coupling continuum damage modeling and discrete...
journal article 2022
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van Hoorn, N. (author), Kassapoglou, C. (author), Turteltaub, S.R. (author), van den Brink, Wouter (author)
Impact experiments of thick fabric carbon/epoxy laminate specimens, with small thickness ratio, are conducted at distinct energy levels and thicknesses to characterise the damage process. These specimens and loading conditions are representative of a new generation of critical structural components in aviation, such as wing spars, landing...
journal article 2022
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Hou, Naidan (author), Zhao, Renxi (author), Li, Jian (author), Wang, Xuan (author), Li, X. (author), Cui, Hao (author), Li, Yulong (author)
Rain erosion may cause substantial damage to aircrafts during supersonic flight. Such event is investigated here via high-speed waterjet impact on composite laminates. An experimental setup is developed to produce waterjets with the speed up to 700m/s and a finite element model of the waterjet-composite impact event is established. The...
journal article 2022
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Bhangale, J.A. (author)
The work done for this thesis is related to fatigue analysis of various material types used in the wind turbine blades. For the analysis, a framework from the thermodynamics of irreversible processes with internal variables and Continuum Damage Mechanics (CDM) is used. Thermodynamic principles provide a generic framework that is valid for the...
doctoral thesis 2021
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Yépez Calderón, Andrés (author)
Energetic materials have widespread applicability in various fields of engineering as propellants, explosives, and pyrotechnics. The Netherlands Organisation for Applied Scientific Research (TNO) is investigating additive manufacturing of solid propellants. As part of this investigation, TNO developed a new polymer binder mix for solid...
master thesis 2021
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Mohammadi, Reza (author), Ahmadi Najafabadi, Mehdi (author), Saghafi, Hamed (author), Saeedifar, M. (author), Zarouchas, D. (author)
Interleaving composite laminates with nanofibrous mat is one of the most reliable methods for increasing interlaminar fracture toughness. The present study seeks to find out how the damage mechanisms of carbon fiber reinforced polymers (CFRPs), subjected to the mode-I and mode-II fracture tests, are affected while those are modified by...
journal article 2021
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Soriano Sutil, Alejandro (author)
Type IV composite pressure vessels (CPVs) are used commercially for the gaseous storage of hydrogen in fuel cell electric vehicles (FCEVs). However, their economic implementation requires material optimization and a reliable prediction of the vessel strength. In this regard, their burst when loaded under internal pressure is impacted by the...
master thesis 2020
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Poot, Anne (author)
In this thesis, the basis for a general implementation of the Thick Level Set method is presented. This basis combines the general applicability of the TLS_V1 method by Moës et al. with the improved fracture mechanics of the TLS_V2 method by Lé et al. In order to accomplish this, the topological skeleton needs to be found for an arbitrary...
master thesis 2020
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Sluijs, J. (author)
Crack growth is an important failure mechanism in many engineering materials. Numerical models for crack growth have been developed within the framework of damage mechanics. All these models aim for the same goal, obtaining accurate results for crack growth under various loading conditions. Many damage models are based upon the cohesive crack...
master thesis 2020
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Saeedifar, M. (author), Saleh, M. (author), Teixeira De Freitas, S. (author), Zarouchas, D. (author)
The aim of the present study is to characterize the damage in bi-material steel-to-composite double-lap adhesively-bonded joints using Acoustic Emission (AE). Two different structural adhesives, a ductile (Methacrylate-based) and brittle (Epoxy-based), were used to bond CFRP skins to a steel core. The fabricated joints were loaded in tension...
journal article 2019
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Saeedifar, M. (author), Najafabadi, Mehdi Ahmadi (author), Zarouchas, D. (author), Toudeshky, Hossein Hosseini (author), Jalalvand, Meisam (author)
This study focuses on the clustering of the indentation-induced interlaminar and intralaminar damages in carbon/epoxy laminated composites using Acoustic Emission (AE) technique. Two quasi-isotropic specimens with layups of [60/0/-60]4S (is named dispersed specimen) and [604/04/-604]S (is named blocked specimen) were fabricated and subjected to...
journal article 2018
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van Dongen, B.R. (author), van Oostrum, A. (author), Zarouchas, D. (author)
Progressive damage analysis of composite structures remains problematic, holding back the full potential of these materials. Widely used continuum damage models feature a heuristical stiffness reduction to reflect damage, resulting in an unrealistic representation of damage patterns. To the end of a more realistic failure representation, this...
journal article 2018
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Coppejans, Okko (author)
This master thesis is built up around two questions. First: Is it possible to calibrate a ductile failure model, where the strain at failure is a function of stress triaxiality and Lode angle, using only a single SENB specimen? The failure model that is referred to describes local failure in a finite element model to simulate ductile fracture....
master thesis 2017
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HARSH, Aditya (author)
It is well known in the oil & gas industry that mature oil fields with a water drive produce increasing volumes of oily produced water which require treatment and efficient disposal. It is a major concern of all waterflood operations now in the industry, to adopt cost effective and environmentally sound water disposal systems. Re-injection...
master thesis 2017
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van Dongen, björn (author)
Despite great strides made in understanding and modelling Fiber-Reinforced Polymers (FRPs), their full potential is held back by the inability to accurately predict failure. Contrary to past attempts focused on isolated application of stress-strain and fracture mechanics based failure theories, this research builds upon the existing framework by...
master thesis 2017
Searched for: subject%3A%22Damage%255C+mechanics%22
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