by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C, Springfield, Va .
Written in English
|Other titles||Time temperature dependent tensile strength of SiC and Al₂O₃-based fibers.|
|Statement||Hee Mann Yun and James A. DiCarlo.|
|Series||NASA technical memorandum -- 107370.|
|Contributions||DiCarlo, James A., United States. National Aeronautics and Space Administration.|
|The Physical Object|
This book investigates the time-dependent behavior of fiber-reinforced ceramic-matrix composites (CMCs) at elevated temperatures. The author combines the time-dependent damage mechanisms of interface and fiber oxidation and fracture with the micromechanical approach to establish the relationships between the first matrix cracking stress, matrix multiple cracking evolution, tensile strength Brand: Springer Singapore. Miyano Y., Kobayashi Y., Nakada M. () Time and Temperature Dependence on Tensile Strength of Unidirectional CFRP with Various Carbon Fibers. In: Arzoumanidis A., Silberstein M., Amirkhizi A. (eds) Challenges in Mechanics of Time Dependent Materials, Volume 2. Conference Proceedings of the Society for Experimental Mechanics : Yasushi Miyano, Yoshiki Kobayashi, Masayuki Nakada. The model predictions agree well with the experimental data. This work could provide a practical technical means for predicting the temperature‐dependent tensile strength of 2D woven fiber reinforced ceramic matrix composites and uncovering the dominated mechanisms leading to the change of tensile strength and their evolution with by: 6. H-M. Yun and J.A. DiCarlo, Time/Temperature Dependent Tensile Strength of SiC and Al 2 O 3-Based Fibers”, Ceramic Transactions, 74, , p. 17– Google Scholar
The maximum tensile strength of A/(PyC/SiC) 4 /SiC, B/(PyC/SiC) 4 /SiC and A/(PyC/SiC) 8 /SiC minicomposites are , and MPa respectively, with the ultimate tensile strain of %, 0. matrix), whereas the ultimate tensile strength would be reduced due to the lower fiber strength of prototype versions of Hi-Nicalon type S (cf. Table 1). 2. Yield and ultimate strength (irradiated) Neutron irradiation can produce a significant decrease in the flexural strength of SiC/SiC. Several notes about Table 6 are given: (1) the melting point of SCS-6 fiber is set as that of its main phase, β-SiC, °C; (2) according to the structural details on SCS-6 fiber reported in the literature, chemical content of this fiber can be estimated, approximately vol% carbon (carbon core, inner and outer coating) and vol. The tensile strength in the temperature range from 25°C to °C decreases by about 10%, while at the temperature of °C it achieves about 75% of Rm value obtained for the temperature 25°C. The decrease is lower for ReL (Rp0,2), i.e.: at the temperature.
In the relation between the tensile strength of carbon fibers and the density of stabilized fibers, a feature depending on stabilization temperature was not evident, and the tensile strength of carbon fibers showed a maximum in the density range from about to g/cm 3 of stabilized fibers. The temperature-dependent tensile strength is an important indicator used to evaluate combination property of short-fiber-reinforced elastomer matrix composite. Some short-fiber-reinforced elastomer matrix composites are manufactured in the molding preparation process, and the tensile tests of fiber, matrix and the composites are carried out at different temperatures. The tensile strength measurements were made at room temperature on as‐received fibers and on fibers after high‐temperature inert exposure. The creep‐rupture property data were obtained at °C in air as well as argon. The objective of this paper is to present simple analytical and empirical models for predicting the effects of time and temperature on CMC tensile rupture under various composite and engine conditions. These models are based on the average rupture behavior measured in air for oxide and SiC-based fibers of current technical interest.