Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 16, 2018
Thermal shock fracture behavior of alumina ceramics under unbalanced thermal stress state was characterized using the Disc-on-Rod (DoR) test. In this test, the thermal stress distribution was calculated from the temperature distribution measured using an infrared camera by the finite element analysis. Furthermore, microfracture process was monitored by acoustic emission (AE) technique during thermal shock fracture. Therefore, transient thermal stress field and microfracture process were characterized dynamically and simultaneously. Using elliptical specimens and elliptical rods, unbalanced biaxial thermal stress state was obtained. Consequently, the stress ratio at the center of the specimen was controlled to designated value.
