牙科石膏的直径测试与双冲头测试之间的比较。

A comparison between the diametral and double-punch testing of a dental gypsum.

作者信息

Boswell P G, Stevens L

出版信息

Aust Dent J. 1979 Aug;24(4):238-43. doi: 10.1111/j.1834-7819.1979.tb02932.x.

DOI:10.1111/j.1834-7819.1979.tb02932.x

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.

摘要

通过径向测试和双冲头测试间接测量牙科石膏的抗张强度。根据脆性断裂的统计理论，可以始终如一地解释观察到的试样尺寸对径向强度和双冲头强度影响之间的差异。与径向测试相比，双冲头测试具有几个重要优点。这些优点包括实验分散性较小、测量强度对试样尺寸的依赖性较弱以及测试程序更简单。