Identification of material parameters for plasticity models: A comparative study on the finite element model updating and the virtual fields method

2018 ◽  
Author(s):  
J. M. P. Martins ◽  
S. Thuillier ◽  
A. Andrade-Campos
Keyword(s):  
Finite Element ◽  
Comparative Study ◽  
Finite Element Model ◽  
Model Updating ◽  
Element Model ◽  
Finite Element Model Updating ◽  
Virtual Fields Method ◽  
Material Parameters ◽  
The Finite Element Model

Accuracy and Robustness Analysis of Geometric Finite Element Model Updating Approach for Material Parameters Identification in Transient Dynamic

2018 ◽  
Vol 16 (01) ◽  
pp. 1850084 ◽  
Author(s):  
Clément Touzeau ◽  
Benoit Magnain ◽  
Quentin Serra ◽  
Éric Florentin
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Numerical Test ◽  
Robustness Analysis ◽  
Element Model ◽  
Finite Element Model Updating ◽  
Transient Dynamic ◽  
Material Parameters ◽  
Material Parameters Identification

We study the accuracy and the robustness of the Geometrical Finite Element Model Updating method proposed in Touzeau et al. [Touzeau, C., Magnain, B., Emile, B., Laurent, H. and Florentin, E. (2016) “Identification in transient dynamic using a geometry-based cost function in finite element model updating method,” Finite Elements Anal. Des. 122, 49–60]. In this work, the method is applied to transient dynamic in finite transformations to identify mechanical material parameters. A stochastic approach is performed to determine accuracy and robustness. The method is illustrated on numerical test cases and compared to a classical FEMU method. Uncertainties on the loading are taken into account in the identification using an original approach.

scholarly journals Finite Element Model Updating of Reinforced Concrete Beams with Honeycomb Damage

2012 ◽  
Vol 58 (2) ◽  
pp. 135-151 ◽  
Author(s):  
Z. Ismail
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Model Updating ◽  
Element Model ◽  
Significant Loss ◽  
Reinforced Concrete Beams ◽  
Finite Element Model Updating ◽  
Finite Element Models ◽  
The Finite Element Model

Abstract A method of detecting honeycombing damage in a reinforced concrete beam using the finite element model updating technique was proposed. A control beam and two finite element models representing different severity of damage were constructed using available software and the defect parameters were updated. Analyses were performed on the finite element models to approximate the modal parameters. A datum and a control finite element model to match the datum test beams with honeycombs were prepared. Results from the finite element model were corrected by updating the Young’s modulus and the damage parameters. There was a loss of stiffness of 3% for one case, and a loss of 7% for another. The more severe the damage, the higher the loss of stiffness. There was no significant loss of stiffness by doubling the volume of the honeycombs.

Finite-element model updating of the traditional beam–column joint in Tibetan heritage buildings using uniform design

2020 ◽  
Vol 23 (9) ◽  
pp. 1890-1901
Author(s):  
Lu Dai
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Uniform Design ◽  
Element Model ◽  
Simplified Model ◽  
Finite Element Model Updating ◽  
Solid Model ◽  
Heritage Buildings ◽  
The Finite Element Model

The Que-Ti joint is the traditional beam–column connection in Tibetan heritage buildings and plays an important role in bearing and transferring load. The structure of the Que-Ti joint is very complicated, which makes it very difficult to build a refined solid model during the numerical simulation process. This means that a simplified model of the Que-Ti joint is required. In this article, we propose a finite-element model updating technique based on uniform design and apply this to the finite-element model updating of the Que-Ti joint. A simplified model of the joint was simulated using two uncertain parameters, and by constructing the uniform design matrix, the specific size of each component within the simplified model was then determined. The stress state of the simplified model was compared to the refined solid model, with results indicating that the stress and strain response of the simplified model had a small rate of error when compared with the refined solid model, which confirmed that the finite-element model updating based on the uniform design was effective and that the simplified model of the Que-Ti joint could be applied to the analysis of the structure as whole. A field measurement was also conducted to further verify the numerical simulation. This investigation provides essential information for the structural analysis of Tibetan heritage buildings.

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