Simulation of Moulding of Refractory Bricks

2010 ◽  
Vol 70 ◽  
pp. 167-172 ◽  
Author(s):  
Dietmar Gruber ◽  
Harald Harmuth
Keyword(s):  
Finite Element ◽  
Production Process ◽  
Finite Element Modelling ◽  
Bulk Material ◽  
Element Modelling ◽  
Product Heterogeneity ◽  
Mould Filling ◽  
Refractory Bricks

Simulations presented here aim to show reasons for undesirable product heterogeneity and possible defects. Potential negative influences are for example insufficient deaeration, friction between the bulk material and the mould, deformation of the mould and an inappropriate mould filling. In a first step data were collected from a production process. This includes the load and displacement during moulding and the mass of the mix filled into the mould. For the Finite Element modelling with ABAQUS the brick material was simulated with a Drucker-Prager model including a cap. The results show the influence of the friction between mix and mould on the densities and stresses in the pressed blank.

scholarly journals Size Effects in Finite Element Modelling of 3D Printed Bone Scaffolds Using Hydroxyapatite PEOT/PBT Composites

Mathematics ◽  
2021 ◽  
Vol 9 (15) ◽  
pp. 1746
Author(s):  
Iñigo Calderon-Uriszar-Aldaca ◽  
Sergio Perez ◽  
Ravi Sinha ◽  
Maria Camara-Torres ◽  
Sara Villanueva ◽  
...  
Keyword(s):  
Finite Element ◽  
Additive Manufacturing ◽  
Tissue Regeneration ◽  
Finite Element Modelling ◽  
Bulk Material ◽  
Bone Tissue Regeneration ◽  
Patient Specific ◽  
Design Factor ◽  
Element Modelling ◽  
Uncertainty Sources

Additive manufacturing (AM) of scaffolds enables the fabrication of customized patient-specific implants for tissue regeneration. Scaffold customization does not involve only the macroscale shape of the final implant, but also their microscopic pore geometry and material properties, which are dependent on optimizable topology. A good match between the experimental data of AM scaffolds and the models is obtained when there is just a few millimetres at least in one direction. Here, we describe a methodology to perform finite element modelling on AM scaffolds for bone tissue regeneration with clinically relevant dimensions (i.e., volume > 1 cm3). The simulation used an equivalent cubic eight node finite elements mesh, and the materials properties were derived both empirically and numerically, from bulk material direct testing and simulated tests on scaffolds. The experimental validation was performed using poly(ethylene oxide terephthalate)-poly(butylene terephthalate) (PEOT/PBT) copolymers and 45 wt% nano hydroxyapatite fillers composites. By applying this methodology on three separate scaffold architectures with volumes larger than 1 cm3, the simulations overestimated the scaffold performance, resulting in 150–290% stiffer than average values obtained in the validation tests. The results mismatch highlighted the relevance of the lack of printing accuracy that is characteristic of the additive manufacturing process. Accordingly, a sensitivity analysis was performed on nine detected uncertainty sources, studying their influence. After the definition of acceptable execution tolerances and reliability levels, a design factor was defined to calibrate the methodology under expectable and conservative scenarios.

Finite element modelling and simulation of bulk material forming

2006 ◽  
Vol 23 (3) ◽  
pp. 250-342 ◽  
Author(s):  
Jaroslav Mackerle
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Bulk Material ◽  
Modelling And Simulation ◽  
Element Modelling ◽  
Material Forming

Finite element modelling of solidification effects in mould filling

1998 ◽  
Vol 31 (2) ◽  
pp. 99-116 ◽  
Author(s):  
K. Ravindran ◽  
R.W. Lewis
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Element Modelling ◽  
Mould Filling

Finite Element Modelling of Mould Filling

1991 ◽  
pp. 441-451 ◽  
Author(s):  
R. W. Lewis ◽  
A. S. Usmani ◽  
J. T. Cross
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Element Modelling ◽  
Mould Filling

Finite-element modelling of concrete prisms reinforced with composite plates - Theory of cracking

10.1617/14073 ◽  
2005 ◽  
Vol 38 (276) ◽  
pp. 219-227
Author(s):  
S. Kesteloot
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Composite Plates ◽  
Element Modelling
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