arXiv subjects

S. Allaoui

Publications and source records attributed to S. Allaoui.

4 recordsLinked to original sources

arXiv2011

Analyse of Woven Reinforcement Preforming by Experimental Approach

An experimental device of dry preform stamping was designed and carried out for the first stage of the RTM process. This tool was developed to test the feasibility to obtain specific double curved shape constituted with dry fabric reinforcement. Optical strain measurement can quantify defects on the composite piece. It is just enough to change the desired punch-die set of the preform. This tool could be used to validate numerical simulation of the process.

physics.class-ph↗

arXiv2011

Analysis of Woven Reinforcement Preforming using an Experimental Approach

In order to understand the mechanisms involved in the forming step of LCM processes and provide validation date to numerical models, a specific experimental device has been designed in collaboration between PRISME Institute and EADS. The goal of this paper is to present the potentialities and the first results obtained with this device.

physics.class-ph↗

arXiv2011

Experimental approach for optimizing dry fabric formability

In order to understand the mechanisms involved in the forming step of LCM processes and provide validation data to numerical models, a specific experimental device has been designed in collaboration between PRISME Institute and EADS. This toot also makes it possible to test the feasibility to obtain specific double curved shape constituted with dry fabric reinforcement. It contains one mechanical module containing the classical tools in forming process, (punch, blank holder, and open-die), and one optical module to measure the 3D-deformed shape and the distribution of local deformations, like shear angles of the woven reinforcement during all the process. The goal of this paper is to present the potentialities and the first results obtained with this device.

physics.gen-ph↗

arXiv2011

Modélisation analytique et numérique de structures sandwich de type carton ondulé

Corrugated cardboard is a sandwich used generally for packing in the form of case. It's the most used material for packing because it can be recycled as well as biodegradable. It's implementation in form of structure, makes the numerical studies of the product (cases) very heavy. Analytical and numerical models were developed to predict the mechanical behavior of the homogenized material. Following that the studies become more simple and less expensive. An analytical model of homogenisation based on the classical laminate theory has been proposed in a previous studies. It predicts the elastic behavior of the corrugated cardboard. This work purposes an extension of this model. Initially, It will be applied at the case of corrugated cardboard composed of more than three constituents. After that, a numerical study of bending witch take account of the effect of shear is proposed. Finally, the anlytical model will be used to predict the elastic and anelastic behavior of the corrugated cardboard.

cond-mat.other↗