Engineering topics

Russell, Steven G.

Publications and source records attributed to Russell, Steven G..

2 records

NASA NTRS1992

A Rayleigh-Ritz design methodology for cutouts in composite structures

A new design methodology is presented for cutouts in composite aircraft structure. The methodology is based on a Rayleigh-Ritz stress analysis procedure that accommodates circular and elliptical cutouts in composite panels under generalized in-plane loading conditions. Cutout padups and panel stiffener reinforcements are also included in this procedure. Panel strength calculations are performed by combining the stress analysis with a generalized version of the average stress failure criterion. Sizing procedures are given for design of padup and stiffener reinforcements in cutout panels, and an example problem is provided to illustrate typical results.

Russell, Steven G.↗

NASA NTRS1991

A Rayleigh-Ritz analysis methodology for cutouts in composite structures

A new Rayleigh-Ritz stress analysis methodology that was developed for composite panels containing cutouts is described. The procedure, which makes use of a general assumed displacement field, accommodates circular and elliptical cutouts in biaxially loaded rectangular composite panels. Symmetric integral padups around the cutout can be included in the analysis. Benchmark results are presented to demonstrate the accuracy of the technique. Strength predictions based on the average stress criterion are generated and compared with experimental data. Finally, the stress analysis methodology is integrated into a design procedure for sizing integral padups around circular cutouts, and a sample problem is solved to illustrate its use.

Russell, Steven G.↗