采用全场应变测量的高温材料测试：实验设计与实践

High-temperature materials testing with full-field strain measurement: experimental design and practice.

作者信息

Novak Mark D, Zok Frank W

机构信息

Materials Department, University of California, Santa Barbara, California 93106, USA.

出版信息

Rev Sci Instrum. 2011 Nov;82(11):115101. doi: 10.1063/1.3657835.

DOI:10.1063/1.3657835

PMID:22129007

Abstract

Experimental characterization of the thermomechanical response of ceramic composites at very high temperatures is plagued by challenges associated with imaging and strain measurement. The problems involve illumination, heat haze, and surface contrast. Techniques that address these challenges have been developed and implemented in a laser heating facility, enabling non-contact strain measurement via digital image correlation. The thermomechanical characterization of both a Ni-based superalloy and a C/SiC composite are used to demonstrate the efficacy of experimental practices in realizing such measurements at temperatures up to 1500 °C.

摘要

陶瓷复合材料在极高温度下热机械响应的实验表征受到与成像和应变测量相关的挑战困扰。这些问题涉及照明、热 haze 和表面对比度。针对这些挑战的技术已在激光加热设备中得到开发和应用，通过数字图像相关实现非接触式应变测量。使用镍基高温合金和 C/SiC 复合材料的热机械表征来证明在高达 1500°C 的温度下进行此类测量的实验方法的有效性。