Transactions of JWRI Paper Information

Trans. JWRI, Vol. 30 (2001), No. 1, pp. 119-125.

FEM Evaluation of Asymmetrical Four-Point Bending Test of SiC/SiC Composite Joints

Hisashi SERIZAWA, Charles A. Lewinsohn and Hidekazu MURAKAWA


     Reliable methods for joining ceramics, for use at elevated temperatures, are enabling technologies for the successful utilization of ceramic components. In this study, the stress distribution of a SiC/SiC composite specimen containing a butt joint consisting of reaction-formed silicon carbide tested by the asymmetrical four-point bending test was precisely analyzed by the finite element method as a means of evaluating the applicability of analytical results. In the case without the effect of the thermal residual stresses, the shear stress distribution at the interface between the base and the joint almost agreed with the analytical theory. For the case with the residual stress, however, the shear stress near the surface was very large and the possibility of an initial crack induced by the residual stress was considered. Moreover, a study of the effect of joint thickness on the residual shear stress indicated that the thickness should be greater than 100 µm to prevent specimen deformation.

KEY WORDS: SiC/SiC Composite, Ceramics, Joint, Finite Element Method, Residual Stress, Shear Strength, Asymmetrical Four-Point Bending Test



[back to Table of Contents Vol. 30 No. 1]

Published by
Joining and Welding Research Institute,
Osaka University
11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Telephone +81-6-6877-5111
Facsimile +81-6-6879-8689

Transactions of JWRI is NOT FOR SALE.

All right reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or any means, electronic, mechanical, photo-copying, recording or otherwise without the prior permission of the publisher.