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Fatigue Behavior Of A Cross Ply Metal Matrix Composite At Elevated Temperature Under Strain Controlled Mode
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Book Synopsis Fatigue Behavior of a Cross-Ply Metal Matrix Composite at Elevated Temperature Under Strain Controlled Mode by :
Download or read book Fatigue Behavior of a Cross-Ply Metal Matrix Composite at Elevated Temperature Under Strain Controlled Mode written by and published by . This book was released on 1994 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research extends the existing knowledge of cross-ply metal matrix composites (MMC) to include fatigue behavior under strain-controlled fully reversed loading. This study investigated fatigue life, failure modes and damage mechanisms of the SCS-6/Ti-15-3, (O/9O)2s, MMC. The laminate was subjected to fully reversed fatigue at elevated temperature (427 deg C) at various strain levels. Stress, strain and modulus data were analyzed to characterize the macro-mechanical behavior of the composite. Microscopy and fractography were accomplished to identify and characterize the damage mechanisms at the microscopic level. Failure modes varied according to the maximum applied strain level showing either mixed mode (i.e. combination of both fiber and matrix dominated modes) or matrix dominated fatigue failures. As expected, higher strain loadings resulted in more ductility of the matrix at failure, evidenced by fracture surface features. For testing of the same composite laminate, the fatigue life under strain controlled mode slightly increased, compared to its load-controlled mode counterpart, using the effective strain range comparison basis. However, the respective fatigue life curves converged in the high cycle region, suggesting that the matrix dominated failure mode produces equivalent predicted fatigue lives for both control modes.
Book Synopsis Fatigue Behavior of a Cross-ply Metal Matrix Composite at Elevated Temperature Under Strain Controlled Mode by : Leon B. Dennis (CAPT, USAF.)
Download or read book Fatigue Behavior of a Cross-ply Metal Matrix Composite at Elevated Temperature Under Strain Controlled Mode written by Leon B. Dennis (CAPT, USAF.) and published by . This book was released on 1994 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Residual Strength After Fatigue of a Cross-Ply Metal Matrix Composite at Elevated Temperature by : Alvin Ruiz
Download or read book Residual Strength After Fatigue of a Cross-Ply Metal Matrix Composite at Elevated Temperature written by Alvin Ruiz and published by . This book was released on 1997-06-01 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to investigate the residual strength of a cross-ply, SCS-6/Ti-15-3, metal matrix composite (MMC) at elevated temperature (427 deg C) when exposed to fatigue loading. Several specimens were subjected to a strain-controlled, fully reversed loading (R=-1), at various strain levels. The specimens were fatigued up to a portion of their life expectancy and then loaded to failure. Stress and strain data obtained during the test provided useful information for the macro-mechanical behavior of the material. It was determined that the residual strength was directly related to the amount of damage present in the matrix, meanwhile, the amount of matrix damage was dependent on the number of cycles and strain level the specimen had been exposed to. It was also observed that the residual strength under the strain controlled mode degraded more consistently than its counterpart under load controlled mode. This variation, however, may be due to the frequency and R-ratio differences between the two loading modes. The comparison of the residual strength degradation of the cross-ply vs. unidirectional laminates reflected a significant difference due to ply orientation. The unidirectional composite exhibited much less residual strength degradation due to the absence of the crack initiation action attributed to the 90 deg plies in the cross-ply.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Longitudinal Fatigue Response of a Metal Matrix Composite Under Strain Controlled Mode at Elevated Temperature by : S. Mall
Download or read book Longitudinal Fatigue Response of a Metal Matrix Composite Under Strain Controlled Mode at Elevated Temperature written by S. Mall and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue characteristics of a unidirectional titanium-based metal matrix composite (MMC) (SCS-6/Ti-15-3) were investigated at elevated temperature (427°C). A hybrid strain controlled loading mode was employed for this purpose. This hybrid control mode did not allow the specimen to experience compressive stress in order to prevent any possible buckling effects. To fully understand the fatigue behavior of the MMC under this control mode, fatigue tests, microscopic evaluation, and micromechanical analysis were performed. Based on this combination of activities, the damage and deformation mechanisms were systematically identified. It was found that the fatigue behavior was initially dominated by creep deformation of the matrix. This was accompanied by plastic deformation in those specimens that were subjected to a maximum strain level of 0.55% or higher. Depending on the maximum strain level, the specimen failure was a result of either fiber fracture or matrix cracking. Using the combined approach involving experiments, microscopy, and analysis, the interrelationships among applied strain levels, fatigue life, damage mechanisms, and macroscopic response were established to characterize the longitudinal fatigue characteristics of the tested MMC.
Book Synopsis Titanium Matrix Composites by : Shankar Mall
Download or read book Titanium Matrix Composites written by Shankar Mall and published by CRC Press. This book was released on 2020-01-29 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review and summary of advancements related to mechanical behavior and related mechanics issues of titanium matrix composites (TMCs), a class of high-temperature materials useful in the propulsion and airframe components in advanced aerospace systems. After an introduction to TMCs, different authors review and summarise the advancements related to mechanical behavior and related mechanics issues of TMCs.
Book Synopsis Thermomechanical fatigue behavior of materials by : Michael J. Verrilli
Download or read book Thermomechanical fatigue behavior of materials written by Michael J. Verrilli and published by ASTM International. This book was released on 1996 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Residual Strength After Fatigue of Unidirectional and Cross-Ply Metal Matrix Composites at Elevated Temperature by : Sen-Tzer Chiou
Download or read book Residual Strength After Fatigue of Unidirectional and Cross-Ply Metal Matrix Composites at Elevated Temperature written by Sen-Tzer Chiou and published by . This book was released on 1996-06-01 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigated the residual strength of the unidirectional and cross-ply laminates of SCS-6 / Ti-15-3, metal matrix composite at elevated temperature 427 deg C (800 deg F) after under tension-tension load controlled mode. For this purpose, several specimens were fatigued to various fractions of the fatigue life and then loaded monotonically to failure. The purpose of this study was to determine the effects of different levels of fatigue damage on the composite's strength. The unidirectional specimens were cycled at a 900 MPa maximum stress at a frequency of 10 Hz, while, the cross-ply specimens were tested at both 300 MPa and 450 MPa at 5 Hz and 10 Hz, respectively. The residual strength results for the three cases showed similar trends in that residual strength drop with cycles was small until near the end of the fatigue life. Both the unidirectional and cross-ply specimens demonstrated only a small drop of the residual strength with cycles until near the end of the fatigue life. (Author)
Book Synopsis Investigation of Fatigue Behavior In Notched Cross-Ply Titanium Metal Matrix Composite at Elevated Temperature by :
Download or read book Investigation of Fatigue Behavior In Notched Cross-Ply Titanium Metal Matrix Composite at Elevated Temperature written by and published by . This book was released on 1992 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research was to investigate the initiation and progression of damage which develops in notched (0/90) sub 2S SCS-6/Ti-15-3 at elevated temperature. Testing consisted of a monotonic tensile test at 427 deg C followed by fatigue testing performed under load control with a stress ratio of 0.1 at a frequency of 10 Hz. A crack was defined to have initiated when it had attained a length greater than or equal to 0.124 mm. Crack initiation and progression was monitored by strain and modulus observations and visual inspection via telemicroscope. The cracks were recorded with edge and face replicas. Metallographic and fractographic analysis was performed after specimen failure. Fatigue cracks initiated in the matrix at four locations on the front and back faces of each specimen. Two of these cracks became through-cracks and eventually developed into major cracks which caused the fracture. The applied stress (S) and fatigue lives (N) curves for both initiation and fatigue life were established. Also, crack growth curves as the function of fatigue cycles were established. A detailed metallographic analysis was performed to understand the damage mechanisms and its implication on the observed notched fatigue behavior.
Book Synopsis Fatigue and Fracture at Elevated Temperatures by : Arvind Nagar
Download or read book Fatigue and Fracture at Elevated Temperatures written by Arvind Nagar and published by . This book was released on 1995 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Petrus Blesensis, Bathoniensis in Anglia Arch by :
Download or read book Petrus Blesensis, Bathoniensis in Anglia Arch written by and published by . This book was released on 1855 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Tension-compression Fatigue Behavior of a Notched Cross-ply Metal Matrix Composite at Elevated Temperature by : Matthew W. Yocum (2LT, USAF.)
Download or read book Investigation of Tension-compression Fatigue Behavior of a Notched Cross-ply Metal Matrix Composite at Elevated Temperature written by Matthew W. Yocum (2LT, USAF.) and published by . This book was released on 1994 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Tension-compression Fatigue Behavior of a Cross-ply Metal Matrix Composite at Room and Elevated Temperatures by : Elizabeth A. Boyum (CAPT, USAF.)
Download or read book Investigation of Tension-compression Fatigue Behavior of a Cross-ply Metal Matrix Composite at Room and Elevated Temperatures written by Elizabeth A. Boyum (CAPT, USAF.) and published by . This book was released on 1993 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Behavior of a Cross-Ply Ceramic Matrix Composite at Elevated Temperatures Under Tension-Tension Loading by :
Download or read book Fatigue Behavior of a Cross-Ply Ceramic Matrix Composite at Elevated Temperatures Under Tension-Tension Loading written by and published by . This book was released on 1993 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted which investigated the behavior of a Nicalon/ Calcium-Aluminosilicate (Nicalon/CAS) cross-ply ((0/90)2S) ceramic matrix composite at elevated temperatures under tension-tension fatigue loading. Tension-tension fatigue tests were performed with a load ratio of R = 0.10 and a frequency of 10 Hertz at 700 deg C and 850 deg C. These results were compared to results from a previous study conducted at room temperature. Material behavior and damage was recorded by fatigue life curves, elastic modulus' maximum and minimum strain, acetate replication techniques, and post-mortem fractography. Analysis of these results showed identical matrix dominated damage behavior at RT and 700 deg C. Ultimate failure was caused by an accumulation of matrix damage, most of which occurred on the first cycle. However, at 8500C, significantly less damage occurred to the matrix and failure was fiber dominated. Fiber debonding was identified as the major damage mechanism responsible for final failure at this elevated temperature. Ceramic matrix composite, Tension-tension fatigue elevated temperature, Fiber debonding.
Book Synopsis Thermo-mechanical Fatigue Behavior of Materials by : Huseyin Sehitoglu
Download or read book Thermo-mechanical Fatigue Behavior of Materials written by Huseyin Sehitoglu and published by ASTM International. This book was released on 2000 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Behavior of a Cross-ply Ceramic Matrix Composite at Elevated Temperatures Under Tension-tension Loading by : Richard J. Tuznik (CAPT, USAF.)
Download or read book Fatigue Behavior of a Cross-ply Ceramic Matrix Composite at Elevated Temperatures Under Tension-tension Loading written by Richard J. Tuznik (CAPT, USAF.) and published by . This book was released on 1993 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Behavior of a Cross-ply Ceramic Matrix Composite at Elevated Temperatures Under Tension-tension Loading by : Craig D. Steiner (CAPT, USAF.)
Download or read book Fatigue Behavior of a Cross-ply Ceramic Matrix Composite at Elevated Temperatures Under Tension-tension Loading written by Craig D. Steiner (CAPT, USAF.) and published by . This book was released on 1994 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
