Recent research advances in the dynamic behavior of shells: 1989-2000, Part 1: Laminated composite shells

In this paper, the finite element method has been applied to solve free and forced vibration problems of isotropic and laminated composite shells with and without cutouts employing the eight-node isoparametric finite element formulation. Specific numerical problems of earlier investigators are solved to compare their results. Moreover, free vibration problems of cylindrical, spherical, saddle (hyperbolic paraboloid bounded by parabolas), hypar (hyperbolic paraboloid bounded by straight lines), and conoidal shells with cutouts and forced vibration of composite hypar and conoidal shells without cutouts are examined to arrive at some conclusions useful to the designers. Eccentrically positioned cutouts and transient stresses are other aspects studied in detail in free and forced vibration analyses, respectively.

Applications of FEM on Free and Forced Vibration of Laminated Shells

Laminated composite stiffened shallow spherical panels with cutouts under free vibration – A finite element approach

Dynamic response of short curved pipes to impulsive loading

In this study, a comparison between theoretical solutions and experimental results are examined for fracture conditions in the case of float glass plates subject to static loadings. The ranges from fracture-generated initiations to critical penetration energies are confirmed according to the impactor mass under high velocity, and an analytical method is presented to determine the fracture strength and penetration strength. Also, fracture patterns are investigated according to impact velocities.

C. C. Chao

Papers

Step pressure and blast responses of clamped orthotropic hemispherical shells