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Carrasco, Miguel and Ivorra, Benjamin and Ramos del Olmo, Angel Manuel (2015) Stochastic Topology Design Optimization for Continuous Elastic Materials. Computer Methods in Applied Mechanics and Engineering, 289 . pp. 131154. ISSN 00457825 (In Press)
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Official URL: http://www.sciencedirect.com/science/article/pii/S0045782515000444
Abstract
In this paper, we develop a stochastic model for topology optimization. We find robust structures that minimize the compliance for a given main load having a stochastic behavior. We propose a model that takes into account the expected value of the compliance and its variance. We show that, similarly to the case of truss structures, these values can be computed with an equivalent deterministic approach and the stochastic model can be transformed into a nonlinear programming problem, reducing the complexity of this kind of problems. First, we obtain an explicit expression (at the continuous level) of the expected compliance and its variance, then we consider a numerical discretization (by using a finite element method) of this expression and finally we use an optimization algorithm. This approach allows to solve design problems which include point, surface or volume loads with dependent or independent perturbations. We check the capacity of our formulation to generate structures that are robust to main loads and their perturbations by considering several 2D and 3D numerical examples. To this end, we analyze the behavior of our model by studying the impact on the optimized solutions of the expectedcompliance and variance weight coefficients, the laws used to describe the random loads, the variance of the perturbations and the dependence/independence of the perturbations. Then, the results are compared with similar ones found in the literature for a different modeling approach.
Item Type:  Article 

Uncontrolled Keywords:  Topology optimization; Structural optimization; Stochastic programming; Finite element method 
Subjects:  Sciences > Physics > PhysicsMathematical models Sciences > Mathematics Sciences > Mathematics > Numerical analysis 
ID Code:  28198 
Deposited On:  10 Feb 2015 11:37 
Last Modified:  12 Dec 2018 15:06 
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Stochastic Topology Design Optimization for Continuous Elastic Materials. (deposited 16 Jul 2014 10:24)

Stochastic Topology Design Optimization for Continuous Elastic Materials. (deposited 10 Feb 2015 09:25)
 Stochastic Topology Design Optimization for Continuous Elastic Materials. (deposited 10 Feb 2015 11:37) [Currently Displayed]

Stochastic Topology Design Optimization for Continuous Elastic Materials. (deposited 10 Feb 2015 09:25)
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