Moduli determination of continuous fiber ceramic composites (CFCCs)

Damage mechanisms and fiber orientation effects on the load-bearing capabilities of a NEXTEL/BLACKGLAS low-cost ceramic composite

“…However, their dation has granted a 3-year combined research-curriculum intrinsic brittle nature, which usually causes catastrophic development project on ceramic-matrix composites to the failures, has hindered their extensive applications. [1] The University of Tennessee. [8] toughness of these structural ceramics can be improved by NEXTEL/BLACKGLAS, a NEXTEL fiber fabric-reinintroducing continuous ceramic fiber reinforcements into forced BLACKGLAS low-cost ceramic composite, has been the ceramic matrices to form continuous fiber-reinforced drawing great attention in the CFCC community since 1992. ceramic composites (CFCCs).…”

Tensile Fracture Behavior of Nicalon/SiC Composites

“…[18][19][20][27][28][29][30] X-ray CT is distinguished from conventional X-ray radiography by the view of creating a final image. X-ray CT is an advanced form of conventional X-ray radiography, that is, a conventional radiograph is a 2-D presentation of a three-dimensional object, and the image plane is approximately normal to the X-ray beam.…”

“…[18][19][20][21][22] However, most work was focused on the characterization of CFCCs mainly using a single NDE technique, i.e., ultrasonic testing (UT), X-ray computed tomography (CT), or acoustic emission (AE). [18][19][20][21][22][23][24] Therefore, in this investigation, several different types of NDE techniques were employed for NDE of CFCCs. This investigation uses a combination of two NDE techniques, UT and X-ray CT, to provide precise characterization of the CFCC specimens prior to mechanical testing.…”

“…However, relatively little work has been performed on the investigation of micromechanisms of fracture in CFCCs using NDE techniques. [18][19][20] In this research, several NDE techniques, such as UT, X-ray CT, and infrared (IR) thermography, were used for CFCCs to characterize the fracture behavior before and during monotonic tensile loadings. Thus, the main objectives of this investigation on NDE and tensile behavior of continuous Nicalon fiber-reinforced SiC matrix composites (Nicalon/SiC) are to (1) apply NDE techniques for assuring the quality and structural integrity of CFCCs; (2) perform NDE using UT and X-ray CT methods for the analyses of defect distributions that may affect mechanical properties, before tensile testing;…”

Fiber-Reinforced CMCs: Processing, mechanical behavior, modeling

“…In addition, this composite being a relatively new material, there is little theoretical fracture modeling work present in the literature. [6][7][8][9]39 The underlying premise to the model is that a crack initiates and propagates straight through the matrix, leaving the fibers intact in its wake. As the crack mouth opens, it is assumed that the fibers are loaded to their breaking strength at all times and are being pulled from the matrix with frictional sliding causing a crack closure effect.…”