6533b7d8fe1ef96bd126abf9
RESEARCH PRODUCT
A bilateral convergent bounding technique for plastic deformations
Matelda Lo BiancoLuigi PalizzoloFrancesco Giambancosubject
Mathematical optimizationSequenceLinear programmingMechanics of MaterialsBounding overwatchDynamic loadingMechanical EngineeringComputationApplied mathematicsQuadratic programmingCondensed Matter PhysicsLinear combinationMathematicsdescription
For the class of elastic perfectly plastic discrete structures, subjected to a dynamic loading history, a bilateral bounding technique for plastic deformations has been studied. The computation of the bound is founded on the concept that to obtain it, any history of fictitious plastic deformations can be used, if only admissible. Such history is obtained by solving a sequence of linear programming problems (LPPs) with a multiple step compared to the step of the sequence of the quadratic programming problems (QPPs) adopting in the classic elasto-plastic analysis. The constraints of the LPPs coincide with the constraints of the QPPs, while the objective function is a linear combination of variables with suitable weight coefficients. The technique seems to require a rather reduced computational effort compared to both the stepwise analysis problem and the other bounding techniques.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-09-01 | Meccanica |