Entity

Time filter

Source Type


Diagne S.,Laboratory of Computer Science and Engineering for Innovation | Diagne S.,Laboratory of Design Engineering | Diagne S.,Laboratory of Computer Science of Dakar | Coulibaly A.,Laboratory of Computer Science and Engineering for Innovation | And 3 more authors.
16th International Dependency and Structure Modelling Conference, DSM 2014 | Year: 2014

The evaluation of the behavioral performance of Complex Mechatronic Products (CMP) at an early design stage is a major challenge in manufacturing industries. It requires a modeling approach that take into account the different technologies that compose such products and the interactions between them. In this paper, we propose to combine Object-oriented modeling approach and Design Structure Matrix (DSM) modeling approach to build the Multi-Solution, Multi-Instance eXtended Conceptual Design Semantic Matrix (MSMI X-CDSM) of complex mechatronic products at the design stage. To illustrate our approach, a mini-car is used as a case study.


Nowamooz H.,Laboratory of Design Engineering | Ho X.N.,Laboratory of Design Engineering | Chazallon C.,Laboratory of Design Engineering | Hornych P.,Laboratoire Central des Ponts et Chaussees
Engineering Geology | Year: 2013

Road pavement structures are generally composed of granular materials. The influence of the unsaturated state, or suction, on the mechanical behavior of unbound granular materials in roads during a large number of cycles has not been given sufficient attention and is not generally considered in models used for these materials. This article presents an experimental study on compacted natural sand in Missillac, France that used the direct shear test and the soil water retention curve (SWRC) to measure the effective stress, and repeated load triaxial tests to determine the material's resilient behavior. The effective stress concept was used in a nonlinear elasticity model to predict the material's resilient behavior under unfavorable moisture conditions, which are one of the most common mechanisms of deterioration in low-traffic pavements. © 2012 Elsevier B.V.


Nowamooz H.,Laboratory of Design Engineering | Nowamooz H.,University of Lorraine | Chazallon C.,Laboratory of Design Engineering | Arsenie M.I.,Laboratory of Design Engineering | And 3 more authors.
Computers and Geotechnics | Year: 2011

Granular materials are generally used in unbound layers of road pavement structures. The mechanical behavior of these materials is widely studied with repeated load triaxial tests (RLTT) in which the elastic response is defined as the resilient behavior. Usually observed under total stress conditions, the effect of pore pressure changes during loading are not usually included in design. Further, the unbound layers frequently exist under partially saturated conditions. The influence of the unsaturated state, i.e., the suction, on the mechanical behavior, of unbound granular materials for roads has not been sufficiently studied and is generally not taken into account in models used for these materials. This article presents an experimental study of the repeated load response of a compacted clayey natural sand, and describes a model for the response which includes the effects of soil suction. The response of the proposed model formulated in terms of effective stress is compared with a similar model formulated in terms of total stress. The results from both the effective stress model and the total stress model are compared with the measured volumetric and deviatoric response. It is suggested that since the model parameters for the effective stress formulation are relatively constant for all values of suction (water content), the resilient response can be best captured by an effective stress model. © 2011 Elsevier Ltd.

Discover hidden collaborations