Elastoplastic constitutive model parameter determination for dry cohesive powders with finite element application to low pressure powder compression

Virendra Puri, M. A. Tripodi, Gary Lynn Messing, H. B. Manbeck

Research output: Contribution to journalArticle

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Abstract

A basic elastoplastic model (modified Cam-clay) was applied to a dry cohesive powder, flour. Five constitutive parameters for the modified Cam-clay model were previously determined using triaxial tests. To apply the elastoplastic constitutive model, a test cylinder was built that uniaxially compacted the test powder under constant axial displacement. Hoop and vertical strains in the cylinder wall were measured at three levels during compaction. Predicted vertical and hoop strains using a finite element model (FEM), were adequate for all three levels. The FEM also predicted stress distribution in the powder mass, which proved useful in identifying potential regions of stress concentration and large shear stresses in the powder mass.

Original languageEnglish (US)
Pages (from-to)597-609
Number of pages13
JournalInternational SAMPE Technical Conference
Volume27
StatePublished - 1995

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Constitutive models
Powders
Compaction
Cams
Stress concentration
Clay
Shear stress
clay

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Chemical Engineering(all)
  • Polymers and Plastics
  • Chemical Engineering (miscellaneous)

Cite this

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abstract = "A basic elastoplastic model (modified Cam-clay) was applied to a dry cohesive powder, flour. Five constitutive parameters for the modified Cam-clay model were previously determined using triaxial tests. To apply the elastoplastic constitutive model, a test cylinder was built that uniaxially compacted the test powder under constant axial displacement. Hoop and vertical strains in the cylinder wall were measured at three levels during compaction. Predicted vertical and hoop strains using a finite element model (FEM), were adequate for all three levels. The FEM also predicted stress distribution in the powder mass, which proved useful in identifying potential regions of stress concentration and large shear stresses in the powder mass.",
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AU - Tripodi, M. A.

AU - Messing, Gary Lynn

AU - Manbeck, H. B.

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AB - A basic elastoplastic model (modified Cam-clay) was applied to a dry cohesive powder, flour. Five constitutive parameters for the modified Cam-clay model were previously determined using triaxial tests. To apply the elastoplastic constitutive model, a test cylinder was built that uniaxially compacted the test powder under constant axial displacement. Hoop and vertical strains in the cylinder wall were measured at three levels during compaction. Predicted vertical and hoop strains using a finite element model (FEM), were adequate for all three levels. The FEM also predicted stress distribution in the powder mass, which proved useful in identifying potential regions of stress concentration and large shear stresses in the powder mass.

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