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Acoustic Emission-Based Methodology to Evaluate Delamination Crack Growth Under Quasi-static and Fatigue Loading Conditions (2017)
Journal Article
Saeedifar, M., Ahmadi Najafabadi, M., Mohammadi, K., Fotouhi, M., Hosseini Toudeshky, H., & Mohammadi, R. (2018). Acoustic Emission-Based Methodology to Evaluate Delamination Crack Growth Under Quasi-static and Fatigue Loading Conditions. Journal of Nondestructive Evaluation, 37(1), https://doi.org/10.1007/s10921-017-0454-0

© 2017, The Author(s). The aim of this study was to investigate the applicability of acoustic emission (AE) technique to evaluate delamination crack in glass/epoxy composite laminates under quasi-static and fatigue loading. To this aim, double cantil... Read More about Acoustic Emission-Based Methodology to Evaluate Delamination Crack Growth Under Quasi-static and Fatigue Loading Conditions.

Pseudo-ductility and reduced notch sensitivity in multi-directional all-carbon/epoxy thin-ply hybrid composites (2017)
Journal Article
Czél, G., Rev, T., Jalalvand, M., Fotouhi, M., Longana, M. L., Nixon-Pearson, O. J., & Wisnom, M. R. (2018). Pseudo-ductility and reduced notch sensitivity in multi-directional all-carbon/epoxy thin-ply hybrid composites. Composites Part A: Applied Science and Manufacturing, 104, 151-164. https://doi.org/10.1016/j.compositesa.2017.10.028

© 2017 The Author(s) Un-notched and notched tensile response and damage accumulation of quasi-isotropic carbon/epoxy hybrid laminates made of ultra-high modulus and intermediate modulus carbon fibre/epoxy thin-ply prepregs were studied. It was confir... Read More about Pseudo-ductility and reduced notch sensitivity in multi-directional all-carbon/epoxy thin-ply hybrid composites.

Orientation-dispersed pseudo-ductile hybrid composite laminates – A new lay-up concept to avoid free-edge delamination (2017)
Journal Article
Jalalvand, M., Fotouhi, M., & Wisnom, M. R. (2017). Orientation-dispersed pseudo-ductile hybrid composite laminates – A new lay-up concept to avoid free-edge delamination. Composites Science and Technology, 153, 232-240. https://doi.org/10.1016/j.compscitech.2017.10.011

Multi-Directional hybrid composites can suffer from free-edge delamination, a damage mode that doesn't exist in Uni-Directional hybrid composites and can hinder the pseudo-ductility that can be achieved with thin-ply hybrids. This paper presents a ne... Read More about Orientation-dispersed pseudo-ductile hybrid composite laminates – A new lay-up concept to avoid free-edge delamination.

High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour in all fibre orientations (2017)
Journal Article
Wisnom, M. R., Fotouhi, M., & Jalalvand, M. (2017). High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour in all fibre orientations. Composites Science and Technology, 152, 101-110. https://doi.org/10.1016/j.compscitech.2017.08.024

© 2017 This study exploits the potential of thin-ply carbon/glass hybrid laminates to generate high performance Quasi-Isotropic (QI) composite plates that show pseudo-ductility in all fibre orientations under tensile loading, overcoming the inherent... Read More about High performance quasi-isotropic thin-ply carbon/glass hybrid composites with pseudo-ductile behaviour in all fibre orientations.

Experimental analysis of GFRP laminates subjected to compression after drilling (2017)
Journal Article
Zarif Karimi, N., Heidary, H., Fotouhi, M., & Minak, G. (2017). Experimental analysis of GFRP laminates subjected to compression after drilling. Composite Structures, 169, 144-152. https://doi.org/10.1016/j.compstruct.2017.01.017

© 2017 Elsevier Ltd This paper presents an experimental study of drilling-induced delamination on the compressive properties of woven glass fiber-reinforced epoxy composites. In the drilling of laminated composites, interlaminar cracking or delaminat... Read More about Experimental analysis of GFRP laminates subjected to compression after drilling.

Effect of PVDF nanofibers on the fracture behavior of composite laminates for high-speed woodworking machines (2016)
Journal Article
Fotouhi, M., Saghafi, H., Brugo, T., Minak, G., Fragassa, C., Zucchelli, A., & Ahmadi, M. (2017). Effect of PVDF nanofibers on the fracture behavior of composite laminates for high-speed woodworking machines. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 231(1), 31-43. https://doi.org/10.1177/0954406216650711

© 2016 Institution of Mechanical Engineers. The use of light composites when designing fast moving parts for machine tools is emerging as a very efficient solution for improving productivity. Nevertheless, several aspects of these materials have to b... Read More about Effect of PVDF nanofibers on the fracture behavior of composite laminates for high-speed woodworking machines.

Detection of fibre fracture and ply fragmentation in thin-ply UD carbon/glass hybrid laminates using acoustic emission (2016)
Journal Article
Fotouhi, M., Suwarta, P., Jalalvand, M., Czel, G., & Wisnom, M. R. (2016). Detection of fibre fracture and ply fragmentation in thin-ply UD carbon/glass hybrid laminates using acoustic emission. Composites Part A: Applied Science and Manufacturing, 86, 66-76. https://doi.org/10.1016/j.compositesa.2016.04.003

© 2016 The Authors. This paper investigates the link between acoustic emission (AE) events and the corresponding damage modes in thin-ply UD carbon/glass hybrid laminates under tensile loading. A novel configuration was investigated which has not pre... Read More about Detection of fibre fracture and ply fragmentation in thin-ply UD carbon/glass hybrid laminates using acoustic emission.

Investigation of push-out delamination using cohesive zone modelling and acoustic emission technique (2015)
Journal Article
Saeedifar, M., Fotouhi, M., & Ahmadi Najafabadi, M. (2016). Investigation of push-out delamination using cohesive zone modelling and acoustic emission technique. Journal of Composite Materials, 50(25), 3577-3588. https://doi.org/10.1177/0021998315622983

Push-out delamination is a serious concern in the drilling of fibre-reinforced composite materials. This damage occurs as the drill reaches the exit side of the material and can reduce the strength and stiffness of the structure. In this paper, a thr... Read More about Investigation of push-out delamination using cohesive zone modelling and acoustic emission technique.

Prediction of quasi-static delamination onset and growth in laminated composites by acoustic emission (2015)
Journal Article
Saeedifar, M., Fotouhi, M., Ahmadi Najafabadi, M., Hosseini Toudeshky, H., & Minak, G. (2016). Prediction of quasi-static delamination onset and growth in laminated composites by acoustic emission. Composites Part B: Engineering, 85, 113-122. https://doi.org/10.1016/j.compositesb.2015.09.037

© 2015 Elsevier Ltd. All rights reserved. The main objective of this study is to determine the crack tip position during propagation of mode I delamination and also to evaluate interlaminar fracture toughness (GIC) in glass/epoxy composite specimens.... Read More about Prediction of quasi-static delamination onset and growth in laminated composites by acoustic emission.

Analysis of the damage mechanisms in mixed-mode delamination of laminated composites using acoustic emission data clustering (2015)
Journal Article
Fotouhi, M., Sadeghi, S., Jalalvand, M., & Ahmadi, M. (2017). Analysis of the damage mechanisms in mixed-mode delamination of laminated composites using acoustic emission data clustering. Journal of Thermoplastic Composite Materials, 30(3), 318-340. https://doi.org/10.1177/0892705715598362

© The Author(s) 2015. In this study, acoustic emission (AE) technique is used to investigate different time-to-failure mechanisms of delamination in glass/epoxy composite laminates. Woven and unidirectional layups were subjected to the double cantile... Read More about Analysis of the damage mechanisms in mixed-mode delamination of laminated composites using acoustic emission data clustering.

Damage evaluation of composite materials using acoustic emission features and Hilbert transform (2015)
Journal Article
Nazmdar Shahri, M., Yousefi, J., Fotouhi, M., & Ahmadi Najfabadi, M. (2016). Damage evaluation of composite materials using acoustic emission features and Hilbert transform. Journal of Composite Materials, 50(14), 1897-1907. https://doi.org/10.1177/0021998315597555

© SAGE Publications. Acoustic emission (AE) has good potential to characterize failure mechanisms in laminated composite materials. One of the difficult issues using this method can be to establish a good correlation between occurred failure mechanis... Read More about Damage evaluation of composite materials using acoustic emission features and Hilbert transform.

Investigation of the damage mechanisms for mode I delamination growth in foam core sandwich composites using acoustic emission (2015)
Journal Article
Fotouhi, M., Saeedifar, M., Sadeghi, S., Ahmadi Najafabadi, M., & Minak, G. (2015). Investigation of the damage mechanisms for mode I delamination growth in foam core sandwich composites using acoustic emission. Structural Health Monitoring, 14(3), 265-280. https://doi.org/10.1177/1475921714568403

In this article, acoustic emission monitoring was used to identify different types of damage mechanisms which occur during delamination of sandwich structures. Features of the obtained acoustic emission signals and wavelet-based signal processing tec... Read More about Investigation of the damage mechanisms for mode I delamination growth in foam core sandwich composites using acoustic emission.

Prediction of delamination growth in laminated composites using acoustic emission and Cohesive Zone Modeling techniques (2015)
Journal Article
Saeedifar, M., Fotouhi, M., Ahmadi Najafabadi, M., & Hosseini Toudeshky, H. (2015). Prediction of delamination growth in laminated composites using acoustic emission and Cohesive Zone Modeling techniques. Composite Structures, 124, 120-127. https://doi.org/10.1016/j.compstruct.2015.01.003

Mode I delamination is the most common failure mode in laminated composite materials. Determination of the crack growth has a vital role in the damage tolerance analyses of the structures which suffer from this type of damage. The main objective of t... Read More about Prediction of delamination growth in laminated composites using acoustic emission and Cohesive Zone Modeling techniques.

Prediction of delamination growth in carbon/epoxy composites using a novel acoustic emission-based approach (2015)
Journal Article
Mohammadi, R., Saeedifar, M., Toudeshky, H. H., Najafabadi, M. A., & Fotouhi, M. (2015). Prediction of delamination growth in carbon/epoxy composites using a novel acoustic emission-based approach. Journal of Reinforced Plastics and Composites, 34(11), 868-878. https://doi.org/10.1177/0731684415583166

© The Author(s) 2015 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav. Delamination is the most common failure mode in laminated composites and it leads to loss of structural strength and stiffness. In this paper, acoustic emission mon... Read More about Prediction of delamination growth in carbon/epoxy composites using a novel acoustic emission-based approach.

Interlaminar Fracture Toughness Evaluation in Glass/Epoxy Composites Using Acoustic Emission and Finite Element Methods (2014)
Journal Article
Saeedifar, M., Fotouhi, M., Najafabadi, M. A., & Toudeshky, H. H. (2015). Interlaminar Fracture Toughness Evaluation in Glass/Epoxy Composites Using Acoustic Emission and Finite Element Methods. Journal of Materials Engineering and Performance, 24(1), 373-384. https://doi.org/10.1007/s11665-014-1291-2

© 2014, ASM International. Delamination is one of the most common modes of failure in laminated composites and it leads to the loss of structural strength and stiffness. In this paper, mode I, mode II, and mixed of these pure modes were investigated... Read More about Interlaminar Fracture Toughness Evaluation in Glass/Epoxy Composites Using Acoustic Emission and Finite Element Methods.

Acoustic emission-based study to characterize the initiation of delamination in composite materials (2014)
Journal Article
Fotouhi, M., & Najafabadi, M. A. (2016). Acoustic emission-based study to characterize the initiation of delamination in composite materials. Journal of Thermoplastic Composite Materials, 29(4), 519-537. https://doi.org/10.1177/0892705713519811

© The Author(s) 2014. Among the failure modes of composite materials, delamination is the most striking one. It may result in the reduction of stiffness and long-term performance of composite materials. The initiation stage is very crucial in delamin... Read More about Acoustic emission-based study to characterize the initiation of delamination in composite materials.

Investigation of the mixed-mode delamination in polymer-matrix composites using acoustic emission technique (2014)
Journal Article
Fotouhi, M., & Ahmadi Najafabadi, M. (2014). Investigation of the mixed-mode delamination in polymer-matrix composites using acoustic emission technique. Journal of Reinforced Plastics and Composites, 33(19), 1767-1782. https://doi.org/10.1177/0731684414544391

© The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav. This paper is a novel application of acoustic emission (AE) technique to investigate the actual occurring modes of delamination damage (i.e. mode I, mode II and the... Read More about Investigation of the mixed-mode delamination in polymer-matrix composites using acoustic emission technique.

Damage Classification of Sandwich Composites Using Acoustic Emission Technique and k-means Genetic Algorithm (2014)
Journal Article
Pashmforoush, F., Khamedi, R., Fotouhi, M., Hajikhani, M., & Ahmadi, M. (2014). Damage Classification of Sandwich Composites Using Acoustic Emission Technique and k-means Genetic Algorithm. Journal of Nondestructive Evaluation, 33(4), 481-492. https://doi.org/10.1007/s10921-014-0243-y

© 2014, Springer Science+Business Media New York. In this study acoustic emission (AE) technique was used for monitoring mode I delamination test of sandwich composites. Since, during mode I delamination test various damage mechanisms appear, their c... Read More about Damage Classification of Sandwich Composites Using Acoustic Emission Technique and k-means Genetic Algorithm.

Bearing failure of pseudo-ductile thin ply angle-ply laminates
Presentation / Conference
Wu, X., Fuller, J., Fotouhi, M., & Wisnom, M. Bearing failure of pseudo-ductile thin ply angle-ply laminates. Presented at 18 European Conference on Composite Materials -ECCM 18

The aim of this work is to investigate the bearing failure of mechanically fastened joints between thin-ply angle-ply laminates with central 0° plies. To achieve this, pseudo-ductile laminates with two different layups [±6/0]s2 and [±2/0]s4 were... Read More about Bearing failure of pseudo-ductile thin ply angle-ply laminates.

Reduced tensile notch-sensitivity in pseudo-ductile thin ply composites
Presentation / Conference
Wisnom, M., Czél, G., Fotouhi, M., Fuller, J., Jalalvand, M., Rev, T., & Wu, X. Reduced tensile notch-sensitivity in pseudo-ductile thin ply composites. Presented at 18 European Conference on Composite Materials -ECCM 18

Pseudo-ductile thin-ply composites loaded in tension exhibit a non-linear stress-strain response with a plateau, analogous to yielding in a metal. This provides an alternative means for load redistribution at stress concentrations, giving reduced not... Read More about Reduced tensile notch-sensitivity in pseudo-ductile thin ply composites.