Short cracks test program for MH-53J dynamic system and airframe components

Issued as Progress reports [nos. 1-5], and Final report, Project E-16-M5

Elasticity Solutions for Sandwich Orthotropic Cylindrical Shell Under External Pressure,

The elasticity solution is constructed for a cylindrical sandwich shell under external and/or internal pressure and for the same shell under axial load. The solution is an extension of the one for a homogeneous, monolithic shell and is provided in closed form. All three phases, that is, the two face sheets and the core, are assumed to be orthotropic. Moreover, there are no restrictions as far as the individual thicknesses of the face sheets and the sandwich construction may be asymmetric. These solutions can be used as benchmarks for assessing the performance of various sandwich shell theories. Illustrative results are provided in comparison to the sandwich shell theory

Renfu Li Post-Doctoral Fellow Vibration Characteristics of Multiwalled Carbon Nanotubes Embedded in Elastic Media by a Nonlocal Elastic Shell Model

In this paper, the vibrational behavior of the multiwalled carbon nanotubes (MWCNTs