What is meant by Stability failure?
The term "stability failure" in design software refers to the sudden loss of load-bearing capacity of a structure due to instability, without exceeding the material strength. This typically occurs in slender components or thin-walled structures subjected to compressive forces. The most common forms of stability failure are buckling in rods and beams, and bulging in plates or shells.
Typical software functions in the area of "stability failure":
- Eigenvalue analysis: Calculation of critical loads and associated failure modes.
- Nonlinear analysis: Consideration of large deformations and material plasticity.
- Imperfection modeling: Inclusion of geometric and structural imperfections.
- Bifurcation analysis: Investigation of behavior at bifurcation points of the load-deformation curve.
- Sensitivity analysis: Evaluation of the influence of various parameters on stability behavior.
- Optimization algorithms: Adjustment of geometry and material to improve stability.
Examples of "stability failure":
- Euler buckling: Lateral deflection of a slender compression member.
- Bulging of a thin-walled cylindrical shell under axial compression.
- Lateral-torsional buckling of a slender bending beam.
- Plate buckling in web plates of I-beams.
- Torsional buckling of open profiles under compressive load.
- Global stability failure of space trusses.