FRACTURE-RESISTANCE CHARACTERISTICS OF A METAL-TOUGHENED CERAMIC

被引：59

作者：

FLINN, BD ^{[1
]}

LO, CS ^{[1
]}

ZOK, FW ^{[1
]}

EVANS, AG ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,COLL ENGN,DEPT MECH ENGN,SANTA BARBARA,CA 93106

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1993年 / 76卷 / 02期

关键词：

D O I：

10.1111/j.1151-2916.1993.tb03794.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The fracture characteristics of an Al2O3/Al composite are examined. Measurements of resistance curves and work of rupture are compared with predictions of a micromechanical model, incorporating the effects of crack bridging by the Al reinforcements. The bridging traction law is assumed to follow linear softening behavior, characterized by a peak stress, sigma(c), and a critical stretch-to-failure, u(c). The values of simga(c) and u(c) inferred from such comparisons are found to be broadly consistent with independent measurements of stretch-to-failure, along with the measured flow characteristics of the Al reinforcement. The importance of large-scale bridging on the fracture resistance behavior of this class of composite is also demonstrated through both the experiments and the simulations.

引用

页码：369 / 375

页数：7