Applied Mechanics and Materials Vol. 161

Abstract: The simplified calculating model for concrete-filled gypsum wall panels was established. The method for calculating the moment-curvature relationship of concrete core and the force-displacement skeleton curves of shear element was then proposed. The test data of concrete-filled gypsum wall panels were analyzed based on this model. The calculated curves agreed well with the experimental ones, which proves that this model has the advantages of clear mechanical conception，simple calculation and relatively good accuracy，and is convenient for calculating integral structure.

Abstract: Many defects such as micro-voids, micro-cracks are introduced during the preparation of particle reinforced composite coating, which significantly change the mechanical properties of the coating. Based on Mori-Tanaka’s concept of average stress in the matrix and Eshelby’s equivalent inclusions microscopic theory, an incremental theory coupled with ABAQUS subroutine UMAT, is developed to study the influence of initial void and void growth on elasto-plastic properties of composite coating. In the composite containing hard spherical particles, debonding of particle-matrix interface is a significant damage process, and the effect of initial void on particle damage is also considered.

Abstract: Floating slab track is a quality-spring vibration isolation system, which is the most effective ways to reduce the ground vibration and noise transmission. However it has other disadvantages, such as there is low frequency noise problem like "gu long gu long" in the carriage when the train runs across steel floating slab track (FST) area. According to this phenomenon, this paper compared the two different bearing floating slab noise data, studied their dynamic characteristics under train loads. From the isolation principle and noise radiation theory, explained the reasons causing the phenomenon and put forward relevant suggestions.

Abstract: We demonstrate a novel approach to fabricate three dimensional (3-D) surface patterns atop poly(methyl methacrylate) (PMMA). This approach utilizes both shape recovery behavior and swelling phenomenon of the PMMA. The simplicity in the fabrication process affirms the low-cost nature of this approach. Moreover, as obtained 3-D patterned PMMA sample can be used as artificial compound eye.