Effect of sand dilation on core expansion during steel casting

Galles, D.; Beckermann, C.

doi:10.1088/1757-899x/84/1/012022

Cited by 5 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Drucker-Prager criterion is a promising model for IOB core materials, since we assume an influence of the hydro-static pressure on the fracture strength, due to similarities to the porous materials in geo-sciences. Furthermore, Galles and Beckermann model sand cores in steel casting with a Drucker-Prager criterion [ 24 ]. Thorborg et al also utilise a Drucker-Prager model for core materials [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

A Plane Stress Failure Criterion for Inorganically-Bound Core Materials

et al. 2021

View full text Add to dashboard Cite

Inorganically-bound core materials are used in foundries in high quantities. However, there is no validated mechanical failure criterion, which allows performing finite-element calculations on the core geometries, yet. With finite-element simulations, the cores could be optimised for various production processes from robotic core handling to the decoring process after the casting. To identify a failure criterion, we propose testing methods, that enable us to investigate the fracture behaviour of inorganically-bound core materials. These novel testing methods induce multiple bi-axial stress states into the specimens and are developed for cohesive frictional materials in general and for sand cores in particular. This allows validating failure criteria in principal stress space. We found that a Mohr-Coulomb model describes the fracture of inorganic core materials in a plane stress state quite accurately and adapted it to a failure criterion, which combines the Mohr-Coulomb model with the Weakest-Link theory in one consistent mechanical material model. This novel material model has been successfully utilised to predict the fracture force of a Brazilian test. This prediction is based on the stress fields of a finite element method (FEM) calculation.

show abstract

Section: Introductionmentioning

confidence: 99%

A Plane Stress Failure Criterion for Inorganically-Bound Core Materials

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In recent years, research has also been focused on developing new material models to simulate the hot distortion of bonded sand in the casting process [ 4 ]. For example, the modified Drucker-Prager-Cap model (DPC) showed good agreement with experiments for modelling porous materials and describing the hot distortion of sand cores [ 5 ]. The thermomechanical properties of inorganically bonded 3D-printed sand cores needed for modelling the material's behaviour are nearly completely unknown.…”

Section: Introductionmentioning

confidence: 99%