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Numerical study on the sensitivity analysis for strenght and stiffness of regul...
Silva, Hugo Miguel Andrade Lopes Figueiredo da; Peixinho, Nuno; Silva, Filipe SamuelThe aim of this study is to present a sensitivity analysis of geometric variables on the mechanical behavior of regular cellular solids. The cellular solids studied are named “spherical” and “elliptical”, if there is part of an empty sphere inside or if there is part of an empty revolved ellipse, respectively. Pure loads are applied separately, namely compression and shear, in order to study the influence of th...
Development of an experimental apparatus to determine impact response of articu...
Alves, Janete; Correia, Pedro Miguel Cerqueira; Peixinho, Nuno; Flores, PauloThe articulations are subject to static and dynamic loads during daily living. Small impact forces can cause damage on articular surfaces as a result of repetitive impact stress. This paper describes a project for a drop tower to allow dynamic impact test in cartilage tissue aiming to understand the mechanics of the cartilage response to impact and seeking to obtain dynamic properties of cartilage, that are rel...
Characterization of dynamic material properties of light alloys for crashworthi...
Peixinho,Nuno; Doellinger,ClaudiaThis paper presents results on the tensile testing of AZ31B-H24 magnesium alloy and 6111-T4 aluminium alloy at different strain rates. These materials are strong candidates for use in crashworthy automotive components and parts due to their well-balanced combination of strength, stiffness and density. To test their application in the auto industry an understanding of material behaviour at relevant strain rates ...
Testing and analysis of masonry arches subjected to impact loads
Lourenço, Paulo B.; Hunegn, Tibebu; Medeiros, Pedro; Peixinho, NunoA prototype single span masonry arch was designed and its capacity was assessed both experimentally and numerically. The geometric design process was based on the dimensional-constraints of the laboratory. A quasi-static experimental test was conducted on the arch and the force deformation behaviour of the arch was obtained. Joint interface properties might play an important role in numerical assessment of maso...
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