کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1417559 985973 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of the mechanical hysteresis of carbon/ceramic-matrix composites with different fiber preforms
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Comparison of the mechanical hysteresis of carbon/ceramic-matrix composites with different fiber preforms
چکیده انگلیسی
The mechanical hysteresis of four ceramic matrix composites with different carbon fiber preforms, i.e. needled C/SiC, 2D C/SiC, 2.5D C/SiC, and 3D C/SiC, was investigated and compared during cyclic reloading-unloading tests. An effective coefficient of the fiber volume fraction in the direction of loading (ECFL) was defined to characterize fiber architectures of the preforms. It is shown that an increase in permanent strain and a decrease in stiffness with the applied stress were strongly affected by the ECFL. The thermal residual stress (TRS) and ultimate tensile strength of the composites are predicted theoretically related to the ECFL, and then validated by experimental results and microstructural observations. The predicted results not only demonstrate good agreement with experimental measurements, but also explain why differences in the composite ECFL result in substantial variations in TRS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 47, Issue 4, April 2009, Pages 1034-1042
نویسندگان
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