The objective of this paper is to demonstrate how the asymptotic behavior of a shell structure, as the thickness (t) approaches zero, can be evaluated numerically. We consider three representative shell structural problems; the original Scordelis–Lo roof shell problem, a herein proposed modified Scordelis–Lo roof shell problem and the partly clamped hyperbolic paraboloid shell problem. The asym...

A 3-D zero-thickness shell model was developed to simulate the non-spherical response of therapeutic encapsulated microbubbles subjected to ultrasound excitation. The 3-D model was compared with previous developed models for validation. This model was then utilized to study the bubble break-up during non-spherical deformations resulting from the presence of a nearby solid wall. The effect of sh...

We use microfluidics to continuously produce monodisperse polyurea microcapsules (PUMCs) having either aqueous or nonaqueous cores. The microcapsule shells are formed by the reaction between an isocyanate, dissolved in oil, and an amine, dissolved in water, at the surface of oil-in-water or water-in-oil drops immediately as they are formed. Different microcapsule morphologies can be generated u...

Microencapsulation of biological and chemical agents and species (e.g., drugs, proteins, vitamins, cells, fragrances, and flavors) is of great importance to many applications ranging from food and pharmaceutical industry to inkless paper. Particularly, liquid core-polymer shell microcapsules have emerged attracting much attention. This is because using polymer shell makes microcapsules more sta...

The objective of this paper is to gain insight into finite element discretizations of shells using the basic shell mathematical model and, in particular, regarding the sources of ‘‘locking’’. We briefly review the ‘‘basic shell mathematical model’’ and present a formulation of shell finite elements based on this model. These shell finite elements are equivalent to the widely-used continuum mech...