scholarly journals Dolomite fracture modeling using the Johnson-Holmquist concrete material model: Parameter determination and validation

2020 ◽  
Author(s):  
Michał Kucewicz ◽  
Paweł Baranowski ◽  
Jerzy Małachowski
Keyword(s):  
Material Model ◽  
Parameter Determination ◽  
Concrete Material ◽  
Model Parameter ◽  
Fracture Modeling

Efficient Finite Element for Evaluation of Strain Concentrations in Concrete Coated Pipelines

2008 ◽  
Author(s):  
Svein Sævik ◽  
Martin Storheim ◽  
Erik Levold
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
Sandwich Beam ◽  
Beam Theory ◽  
Material Model ◽  
Body Motion ◽  
Theoretical Formulation ◽  
Concrete Material ◽  
Non Linear ◽  
Full Scale Tests

MARINTEK has developed software for detailed analysis of pipelines during installation and operation. As part of the software development a new coating finite element was developed in cooperation with StatoilHydro enabling efficient analysis of field joint strain concentrations of long concrete coated pipeline sections. The element was formulated based on sandwich beam theory and application of the Principle of Potential Energy. Large deformations and non-linear geometry effects were handled by a Co-rotated “ghost” reference description where elimination of rigid body motion was taken care of by referring to relative displacements in the strain energy term. The non-linearity related to shear interaction and concrete material behaviour was handled by applying non-linear springs and a purpose made concrete material model. The paper describes the theoretical formulation and numerical studies carried out to verify the model. The numerical study included comparison between model and full-scale tests as well as between model and other commercial software. At last a 3000 m long pipeline was analysed to demonstrate the strain concentration behaviour of a concrete coated pipeline exposed to high temperature snaking on the seabed.

Fracture and fragmentation of dolomite rock using the JH-2 constitutive model: Parameter determination, experiments and simulations

2020 ◽  
Vol 140 ◽  
pp. 103543 ◽  
Author(s):  
Paweł Baranowski ◽  
Michał Kucewicz ◽  
Roman Gieleta ◽  
Michał Stankiewicz ◽  
Marcin Konarzewski ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Parameter Determination ◽  
Model Parameter ◽  
Dolomite Rock

scholarly journals COMPARISON OF VIRTUAL FIELDS METHOD, PARALLEL NETWORK MATERIAL MODEL AND FINITE ELEMENT UPDATING FOR MATERIAL PARAMETER DETERMINATION

2016 ◽  
Vol 7 ◽  
pp. 7
Author(s):  
Florian Dirisamer ◽  
Umut D. Çakmak ◽  
Imre Kállai ◽  
Martín Machado ◽  
Zoltán Major
Keyword(s):  
Finite Element ◽  
Material Model ◽  
Image Correlation ◽  
Parameter Determination ◽  
Virtual Fields Method ◽  
Material Models ◽  
Time Frequency ◽  
Parallel Network ◽  
Experimental Effort ◽  
Frequency Temperature

Extracting material parameters from test specimens is very intensive in terms of cost and time, especially for viscoelastic material models, where the parameters are dependent of time (frequency), temperature and environmental conditions. Therefore, three different methods for extracting these parameters were tested. Firstly, digital image correlation combined with virtual fields method, secondly, a parallel network material model and thirdly, finite element updating. These three methods are shown and the results are compared in terms of accuracy and experimental effort.

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