A limit analysis approach to derive a thermodynamic damage potential for non-linear geomaterials

2012 ◽  
Vol 92 (28-30) ◽  
pp. 3439-3450 ◽  
Author(s):  
A. Karrech ◽  
T. Poulet ◽  
K. Regenauer-Lieb
Keyword(s):  
Limit Analysis ◽  
Analysis Approach ◽  
Damage Potential ◽  
Non Linear

Plastic limit analysis with non linear kinematic strain hardening for metalworking processes applications

2011 ◽  
Vol 25 (11) ◽  
pp. 2859-2870 ◽  
Author(s):  
Ali Chaaba ◽  
Lahbib Bousshine ◽  
Mohamed Aboussaleh ◽  
Hassan El Boudaia
Keyword(s):  
Strain Hardening ◽  
Limit Analysis ◽  
Plastic Limit ◽  
Non Linear ◽  
Plastic Limit Analysis

Ultimate strength of pin-loaded composite laminates: A limit analysis approach

2011 ◽  
Vol 93 (4) ◽  
pp. 1217-1224 ◽  
Author(s):  
Oualid Limam ◽  
Gilles Foret ◽  
Hatem Zenzri
Keyword(s):  
Ultimate Strength ◽  
Limit Analysis ◽  
Composite Laminates ◽  
Analysis Approach

scholarly journals Use of Evolutionary Computation to Improve Rock Slope Back Analysis

2020 ◽  
Vol 10 (6) ◽  
pp. 2012
Author(s):  
An-Jui Li ◽  
Abdoulie Fatty ◽  
I-Tung Yang
Keyword(s):  
Finite Element ◽  
Evolutionary Computation ◽  
Upper Bound ◽  
Limit Analysis ◽  
Optimization Problems ◽  
Continuous Functions ◽  
Computational Time ◽  
Irregular Solution ◽  
Non Linear ◽  
Geotechnical Problems

Generally, in geotechnical engineering, back analyses are used to investigate uncertain parameters. Back analyses can be undertaken by considering known conditions, such as failure surfaces, displacements, and structural performances. Many geotechnical problems have irregular solution domains, with the objective function being non-convex, and may not be continuous functions. As such, a complex non-linear optimization function is typically required for most geotechnical problems to attain a better understanding of these uncertainties. Therefore, particle swarm optimization (PSO) and a genetic algorithm (GA) are utilized in this study to facilitate in back analyses mainly based on upper bound finite element limit analysis method. These approaches are part of evolutionary computation, which is appropriate for solving non-linear global optimization problems. By using these techniques with upper-bound finite element limit analysis (UB-FELA), two case studies showed that the results obtained are reasonable and reliable while maintaining a balance between computational time and accuracy.

POST-CRITICAL BEHAVIOR OF MODERATELY THICK AXISYMMETRIC SHELLS: A SEQUENTIAL LIMIT ANALYSIS APPROACH

2001 ◽  
Vol 01 (03) ◽  
pp. 293-311 ◽  
Author(s):  
LEONE CORRADI ◽  
NICOLA PANZERI ◽  
CARLO POGGI
Keyword(s):  
Critical Behavior ◽  
Limit Analysis ◽  
Large Deformations ◽  
Material Behavior ◽  
Large Displacement ◽  
Analysis Approach ◽  
Rigid Plastic ◽  
Axisymmetric Shells ◽  
Energy Absorbers ◽  
Displacement Effects

The design of some steel shells, like energy absorbers or bumpers, requires the knowledge of their behavior in large deformations. In this paper, the method of sequential limit analysis is presented and applied to axisymmetric shells in order to study their post-collapse response. Although the material behavior is assumed as rigid-plastic, results compare favorably with those produced by elastic-plastic incremental analyses and the procedure appears to be more efficient and numerically stable. Large displacement effects, both of stable and unstable nature, are implicitly accounted for by mesh updating.

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