Experimental study of ultra-high temperature interlaminar tensile strengths of 3D-needled C/C composites using the V-shaped notched specimen compression method

被引：21

作者：

Xu Chenghai ^{[1
]}

Han Xinxing ^{[1
]}

Cheng Guangyi ^{[1
]}

Meng Songhe ^{[1
]}

Jin Hua ^{[1
]}

机构：

[1] Harbin Inst Technol, Ctr Composite Mat & Struct, Key Lab Sci & Technol Natl Def, Harbin 150080, Heilongjiang, Peoples R China

来源：

MECHANICS OF MATERIALS | 2018年 / 126卷

基金：

中国国家自然科学基金;

关键词：

Needled C/C composite; Ultra-high temperature; Interlaminar tensile strength; V-shaped notched specimen compression; NEEDLED CARBON/CARBON COMPOSITES; SIC COMPOSITES; CARBON-FIBERS; DEGREES-C;

D O I：

10.1016/j.mechmat.2018.07.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, interlaminar tensile (ILT) strengths and microscopic failure mechanisms of 3D needled C/C composites were studied at ultra-high temperatures (up to 2800 degrees C). Experiments were conducted using the V-shaped notched specimen compression method. The measured ILT strengths compared favorably to results obtained via flatwise tension and diametral compression tests. In addition, the high-temperature transverse displacement field was measured using digital image correlation and the temperature field was measured using an infrared thermal imager. The transverse displacement and temperature fields were uniform in the gage section. The results confirm the effectiveness of this method for measurements of 3D needled C/C composites. The ILT strengths of the 3D needled C/C composites were measured at 1200 degrees C, 1600 degrees C, 1800 degrees C, 2000 degrees C, 2400 degrees C, and 2800 degrees C. The ILT strengths increased with the temperature up to 1600 degrees C, and then decreased in the 1600-2800 degrees C range. The failure mechanisms were investigated via optical microscopy. The needling fibers were pulled out, which indicates that the ILT strengths were primarily dependent on interfacial strength. It is intended that these results will provide some practical guidelines for ultra-high temperature engineering applications.

引用

页码：26 / 35

页数：10

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