State of the art in determination of crack direction in Shell structures

Considerable work has been done on the modelling of fracture and necking for accidents in the maritime and offshore industry, but very little has been done to find the crack orientation during this failure. Such information will be required in future analyses which use the eXtended Finite Element Method (XFEM), rather than the element deletion...

Dimple Colloids with Tunable Cavity Size and Surface Functionalities

Dimple colloids with well-defined cavities were synthesized by a modified dispersion polymerization. The key step in the procedure is the delayed addition of crosslinkers into the reaction mixture. By systematically studying the effect of the delayed addition time and the concentration of the cross-linker on the resulting particle morphology, we...

Determination of the shell growth direction during the formation of silica microcapsules by confocal fluorescence microscopy

A novel procedure was developed to determine the direction of silica growth during the formation of a silica shell around aqueous microdroplets in water-in-oil Pickering emulsions. Two fluorescently labeled silica precursors were added consecutively and the resulting microcapsules were visualized via confocal fluorescence microscopy, allowing...

Consequences of using the plane stress assumption for damage calculations in Crash analyses

A finite element-based perturbation method for nonlinear free vibration analysis of composite cylindrical shells

In this paper, a finite element-based approach for nonlinear vibration analysis of shell structures is presented. The approach makes use of a perturbation method that gives an approximation for the amplitude-frequency relation of the structure. The method is formulated using a functional notation and is subsequently converted to a finite element...

A thermopiezomechanical finite rotation shell element

A finite rotation shell element is presented which can be used to analyse thermopiezomechanical phenomena when dealing with thin-walled smart structures. Initially, the underlying theory is explained in order to illustrate the simplifying assumptions that are eventually made. Several locking phenomena are avoided by deploying ANS and EAS...