Search Results for "buckling"

An Excel spreadsheet compares the following four bounds on the yield onset pressure due to Interbay imperfections in thin-wall monocoque and ring-stiffened cylindrical pressure vessels: • Bodner-Berks method [1] • Galletly-Bart method [2] • Gordon’s simply supported method [3] • Gordon’s clamped end method [3] Because the first two methods are based on Donnell's equation of equilibrium, they are applicable only for shallow shells—that is for relatively short thin-wall cylinders whose critical buckling mode shapes are characterized by a large number of circumferential lobes. (Reference [1] claims greater than 8 lobes.) This restriction does not apply to the second two methods because they are based on Morley’s equation of equilibrium [4] rather than Donnell’s. Technical documentation is included.

...Calculate and optimize the following: Minimum plate thickness (DNV/DNVGL-OS-C101) Minimum section modulus of stiffener/plate (DNVGL-OS-C101) Minimum shear area (DNVGL-OS-C101) Buckling (DNVGL-RP-C201) Fatigue for plate/stiffener connection (DNVGL-RP-C203) Compartments (tank pressures) are created automatically. Pressures on external hull (or any other generic location) is defined by specifying equations. You can optimize single plate/stiffener field or multiple. PYTHON: PIP install ANYstructure Code: https://github.com/audunarn/ANYstructure

Files for end users are now controlled at http://www.mystran.com MYSTRAN is a general purpose finite element analysis computer program for structures that can be modeled as linear (i.e. displacements, forces and stresses proportional to applied load). MYSTRAN is an acronym for “My Structural Analysis”, to indicate it’s usefulness in solving a wide variety of finite element analysis problems on a personal computer. For anyone familiar with the popular NASTRAN computer program developed...

A collection of Fortran 2003, 90 and 77 routines, modules and programs for automatic simulation based global constrained optimisation. The initial application is for FE simulation of elasto-plastic buckling of steel rods aimed at tuning the hardening model. Unix shell scripts are used extensively. High concurrency is achieved with parallel multi-start global search and with parallel MPI FE. Powell's BOBYQA or LINCOA are used (not included in this package). Automatic mesh generation of 3D cylinders is provided + automatic boundary conditions, all via Fortran and shell scripting.

...It also includes a range of features that facilitate the visualization and examination of various relevant quantities e.g. velocities, stress, rate of deformation, pressure, and finite strain. Folder contains a separate application, which illustrates analytical solutions of growth rate spectra for buckling and necking of a single viscous layer. Check out the companion paper: doi:10.1016/j.jsg.2016.01.001