A unique modeling approach is introduced, which can track the hysteretic evolution of volume fractions of magnetic moments in several directions and has the potential to predict the magnetomechanical behavior accurately along several important crystallographic directions. The model is benchmarked against the [110] oriented single-crystal Fe82Ga18 experimental magnetomechanical behavior. The different physical effects such as flipping of moments between easy directions versus gradual rotation of moments from easy toward the noneasy directions can be captured by this model. The ability of this model to capture these effects along with hysteresis, some of which are lacking in the previous models, are explained.
Since the mid-1980's, sensors and actuators have been combined with composite materials in order to enhance and increase the functionalities of the resulting products. These innovative devices are called intelligent, adaptive or smart structures. Their main applications are related but not limited to vibration control, structural health monitoring, shape control and energy harvesting. One possible way of developing these devices is to embed the smart materials inside the structure. In this case, the main challenge is the way of embedding the smart material during the manufacturing process. This review presents the key elements of the manufacturing process, provides an overview of the techniques developed to embed the bulk piezoelectric transducers in the composite and details the achievements made with them. In conclusion, some guidelines for futures researches and developments are proposed
An important feature of ship design is the ability to describe the structural behaviour of the hull and to accurately predict its ultimate strength. Research on the ultimate strength of hulls has been carried out by many experimental research groups. Recently, the consensus reached is to simulate the behaviour of the hull by loading a box girder up to its ultimate strength. A box girder was tested at the Royal Military College of Canada. The objective of this experiment is to study the structural behaviour and compare the experimental results with the predictions of two computer codes. The construction of the model follows typical hull construction methods. The girder was subjected to pure bending until failure occurred. Provisions were taken so that collapse would occur due to buckling and not to plastic failure. Residual stresses and initial geometrical imperfections were measured and considered in the analysis. In previous publications, details of the design, fabrication, and loading were presented. In this paper, the experimental results are described and discussed.Key words: box girder, ship's hull, bending, ultimate strength, residual strength, residual stresses, initial imperfections.
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