Articles publicats Departament d'Enginyeria Mecànica i de la Construcció Industrial: Recent submissions
Now showing items 21-40 of 299
Effect of ply thickness and ply level hybridization on the compression after impact strength of thin laminates
There is a lack of research available on how thin laminates respond to impact and post impact loads, even though thin structures are used in present-day aircrafts. This experimental paper employs thick, standard and thin ...
Size effects in hybrid unidirectional polymer composites under longitudinal tension: A micromechanical investigation
While fibre hybrid composites result in hybrid effects and improved ductility compared to non-hybrid laminates, it is unclear how material size influences hybrid properties (i.e. the so-called 'size effect'). This paper ...
A 3D Progressive Failure Model for predicting pseudo-ductility in hybrid unidirectional composite materials under fibre tensile loading
This paper presents a three-dimensional Progressive Failure Model based on the chain of bundles able to represent the stiffness loss in unidirectional composite materials loaded in the fibre direction. A representative ...
A synchrotron computed tomography dataset for validation of longitudinal tensile failure models based on fibre break and cluster development
We performed in-situ tensile tests on two carbon fibre/epoxy composites with continuous scanning using synchrotron computed tomography (CT). Both composites were cross-ply laminates, and two specimens were tested for each ...
Mitigating the weak impact response of thin-ply based thin laminates through an unsymmetrical laminate design incorporating intermediate grade plies
With aeronautic industries focussing on thinner structures and reducing manufacturing costs, recent research has been dedicated to the impact and post impact response of thin laminates (<2 mm) made of textile fabric ...
Numerical study to understand thermo-mechanical effects on a composite- aluminium hybrid bolted joint
Hybrid bolted joints, where carbon fiber reinforced polymers and metallic plates are clamped using bolts, are widely used in aircraft structures. During operation, aircraft experience extreme temperatures that can adversely ...
Blind benchmarking of seven longitudinal tensile failure models for two virtual unidirectional composites
Many models for prediction of longitudinal tensile failure of unidirectional (UD) composites have been developed in the last decades. These models require significant assumptions and simplifications, but their consequences ...
Springback determination of sheet metals in an air bending process based on an experimental work
The air bending process can be erroneously considered as an easy understanding process without complication, but this is a false judge. Several parameters have to be considered in order to avoid precision problems: material ...
An analytical model to predict stress fields around broken fibres and their effect on the longitudinal failure of hybrid composites
This paper presents an analytical model to predict the stress redistribution around broken fibres in hybrid polymer composites. The model is used under the framework of a progressive failure approach to study the load ...
Failure of hybrid composites under longitudinal tension: influence of dynamic effects and thermal residual stresses
A progressive failure model including dynamic effects and thermal residual stresses able to simulate the failure and damage development of hybrid unidirectional polymer composites under fibre tensile loading is presented. ...
Nominal strength of notched pseudo-ductile specimens
Quasi-brittle materials like composites are notch-sensitive, and the stress concentration factor (Kt) determines their strength knock-down. To alleviate this notch sensitivity, researchers are pursuing pseudo-ductility to ...
Unsupervised autoencoders with features in the electromechanical impedance domain for early damage assessment in FRP-strengthened concrete elements
This paper presents the development of a robust automatic diagnosis technique that uses raw Electro-Mechanical Impedance (EMI) signals and deep autoencoder models to detect damage in fiber-reinforced-polymers (FRP) ...
Flexural performance of RC beams strengthened with HB CFRP plates: Experimental study and theoretical model based on the intermediate crack debonding
This paper presents a study on the flexural performance of Reinforced Concrete (RC) beams strengthened with Hybrid Bonded (HB) Carbon Fibre Reinforced Polymer (CFRP) laminates. Single-shear tests and flexural tests on RC ...
An approach to integrate manufacturing process information in part design phases
Design for Manufacturing (DFM) is the integrated practice of designing components while considering their manufacture (O'Driscoll, M., 2002. Design for manufacture. Journal of Material Processing Technology, 122, 318-321). ...
Customized cranial implant manufactured by incremental sheet forming using a biocompatible polymer
Purpose – The purpose of this paper is to demonstrate the feasibility of incremental sheet forming (ISF), using the most common variants, single-point incremental forming (SPIF) and two-point incremental forming (TPIF), ...
Methodology for capturing and formalizing DFM Knowledge
Design for manufacturing (DFM) practices lead to more competitive products from the point of view of cost, development time and quality. However, the success of considering manufacturing issues during design process would ...
A validated simulation methodology for determining single lap shear allowable strength in thermoplastic polymer composites
El títol de la versió preprint o submitted és: "A methodology to obtain the single lap shear allowable strength of thermoplastic polymer composites by a validated modelling and simulation approach"
Development of P(3HB-co-3HHx) nanohydroxyapatite (nHA) composites for scaffolds manufacturing by means of fused deposition modeling
This work reports on the development of nanocomposites based on poly(3- hydroxybutyrate-co-3-hydroxyhexanoate) [P(3HB-co-3HHx)] and nanohydroxyapatite (nHA) for the development of scaffolds by means of a two-stage extrusion ...
A three-dimensional viscoelastic–viscoplastic and viscodamage constitutive model for unidirectional fibre-reinforced polymer laminates
A novel 3D viscoelastic–viscoplastic and viscodamage constitutive model is proposed to predict the viscous effects due to dynamic loading conditions of unidirectional carbon fibre-reinforced polymer laminates at the ...
Activity model and computer aided system for defining sheet metal process planning
This paper focuses on the problem of choosing the manufacturing route and characteristics in sheet metal processes, a very important element in computer aided process planning (CAPP) systems. At present, decisions concerning ...
