This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
COMPUTER CODE FOR PREDICTING THE TWO-DIMENSIONAL NONLINEAR DYNAMIC RESPONSE OF BEAM STRUCTURES SUBJECTED TO TRANSIENT LOADS AND IMPACTS
Annotation ability available
Sector:
Language:
English
Abstract
This paper describes the MENTOR (Meredith Engineering Nonlinear Transient Oscillatory Response) II code, a finite element computer program for the analysis of planar beam structures undergoing large elastic-plastic deformations. The analysis includes the modeling of beam cross-section collapse due to either the direct application of a “crushing load” and/or extreme changes in curvature of the beam neutral axis. Collisions are treated within the MENTOR II program via a monitoring procedure which detects inter-element contact, determines the relative indentations, and calculates the associated local reactive pressure.
The structural equations of motion are derived using Hamilton's principle and are discretized over the beam length using finite elements which are based upon cubic tangential and transverse displacement fields. The integration in time of the equations of motion is accomplished by use of an explicit central difference scheme.
The validity of the MENTOR II program is illustrated by comparing numerical solutions with experimental results for a variety of problems involving large deformation, elastic-plastic behavior.
Authors
Citation
Meredith, D., Witmer, E., and Morman, K., "COMPUTER CODE FOR PREDICTING THE TWO-DIMENSIONAL NONLINEAR DYNAMIC RESPONSE OF BEAM STRUCTURES SUBJECTED TO TRANSIENT LOADS AND IMPACTS," SAE Technical Paper 790989, 1979, https://doi.org/10.4271/790989.Also In
References
- MENTOR II Computer Code Meredith Engineering Glen Valley Drive, Farmington Hills, Michigan
- Wu R. W. -H. Witmer E. A. “Finite-Element Analysis of Large Transient Elastic-Plastic Deformations of Simple Structures with Application to the Engine Rotor Fragment Containment/Deflection Problems.” Aeroclastic and Structures Research Laboratory, Massachusetts Institute of Technology January 1972
- Pirotin S. D. East, G. H. Jr. “Large-Deflection, Elastic-Plastic Response of Piping: Experiment, Analysis and Application,” Paper F3/1, 4th SMIRT Conference San Francisco August 1977
- MENTOR III Formulation Report Meredith Engineering Glen Valley Drive, Farmington Hills, Michigan
- Massachusetts Institute of Technology
- Wu R. W. - H. Witmer E. A. “Approximate Analysis of Containment/Deflection Ring Responses to Engine Rotor Fragment Impact,” Journal of Aircraft 10 1 January 1973
- Ni C-M “Impact Response of Curved Box Beam-Columns with Large Global and Local Deformations,” 14th Structures, Structural Dynamics and Materials Conference Williamsburg, Virginia March 1973
- Peech J. M. Roemer R. E. Pirotin S. D. East G. H. Goldstein N. A. “Local Crush Rigidity of Pipes and Elbows,” 4th SMIRT Conference San Francisco August 1977