title: A comparison between the diametral and double-punch testing of a dental gypsum.
abstract: The tensile strength of a dental gypsum was measured indirectly using both the diametral and the double-punch tests. Observed differences between the effects of specimens size on the diametral and double-punch strengths could be consistently interpreted in terms of the statistical theory of brittle fracture. The double-punch test, when compared with the diametral test, has several important advantages. These advantages include less experimental scatter, a weaker dependence of the measured strength on the specimen size and a simpler testing procedure.
mesh_terms: D002133:Calcium Sulfate; D005069:Evaluation Studies as Topic; D055585:Physical Phenomena; D010825:Physics; D013314:Stress, Mechanical; D013718:Tensile Strength
chemical_list: D002133:Calcium Sulfate