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Load deformation behaviour during a diametral test.

W M Tay1, M Braden

  • 1Dental School of the London Hospital Medical College, UK.

Biomaterials
|July 1, 1990
PubMed
Summary
This summary is machine-generated.

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Cylinder deformation under diametral load is linear for silicate cements, glass ionomer cements, and glass. While Hertzian and Hondros theories predict this linearity, they lack quantitative accuracy for material behavior.

Area of Science:

  • Materials Science
  • Solid Mechanics
  • Biomaterials

Background:

  • Understanding the mechanical properties of dental cements and glass is crucial for material selection and performance prediction.
  • The diametral compression test is a standard method for evaluating the tensile strength of brittle materials.

Purpose of the Study:

  • To investigate the relationship between applied load and diametral deformation in silicate cements, glass ionomer cements, and glass.
  • To evaluate the quantitative accuracy of Hertzian indenter theory and Hondros diametral theory in predicting this behavior.

Main Methods:

  • Experimental measurement of diametral deformation under varying loads for selected materials.
  • Theoretical analysis using Hertzian indenter theory.
  • Theoretical analysis using an integrated form of Hondros diametral theory.

Related Experiment Videos

Main Results:

  • A linear relationship was observed between applied load and diametral deformation for all tested materials.
  • Both Hertzian and Hondros theories qualitatively predicted the linear behavior.
  • Neither theory provided quantitatively accurate predictions of the experimental results.
  • The Hondros theory included an experimentally inaccessible parameter.

Conclusions:

  • The diametral deformation of silicate cements, glass ionomer cements, and glass exhibits linear load dependency.
  • Existing theoretical models (Hertzian, Hondros) require refinement for accurate quantitative prediction of diametral deformation in these materials.