Effect of fibermatrix debonding on notched strength of titanium metal matrix composites
 1991
 1.87 MB
 1964 Downloads
 English
National Aeronautics and Space Administration, Langley Research Center, For sale by the National Technical Information Service , Hampton, Va, [Springfield, Va
Metallic composites., Tita
Other titles  Effect of fiber matrix debonding .... 
Statement  C.A. Bigelow and W.S. Johnson. 
Series  NASA technical memorandum  104131. 
Contributions  Johnson, W. S., Langley Research Center. 
The Physical Object  

Format  Microform 
Pagination  1 v. 
ID Numbers  
Open Library  OL15359092M 
STP Effect of FiberMatrix Debonding on Notched Strength of Titanium MetalMatrix Composites. Author Information: Bigelow, CA Research engineer and senior scientist, NASA Langley Research Center, Hampton, VA. Johnson, WS Research engineer and senior scientist, NASA Langley Research Center, Hampton, VA.
Predictions of the axial stress in the notchtip 0° fiber correlated well with the specimen static strength when fibermatrix debonding of 0° plies was included for the DEN specimen. The results shown indicate that a first fiber failure criteria based on the axial stress in the first intact 0° fiber can predict the static strength of notched Cited by: 4.
Fiber–matrix interface debonding initiated from random fiber breaks is known to be one of the key damage mechanisms in unidirectional (UD) composites subjected to quasistatic and cyclic. Leon L Shaw, Prasanna Karpur, Theodore E Matikas, Fracture strength and damage progression of the fiber/matrix interfaces in titaniumbased MMCs with different interfacial layers, Composites Part B: Engineering, /S(96), 29, 3, (), ().Cited by: Request PDF  Notch sensitivity of Ti‐based unidirectional metal matrix composites under tensile and fatigue loading  Neuber’s rule and the notch equivalent crack length Effect of fibermatrix debonding on notched strength of titanium metal matrix composites book were utilized.
This paper presents a fibermatrix debonding model for metal matrix composites based on a modified Needleman () type cohesive zone model.
In this model the fibermatrix interface is fully described by its strength and ductility under normal and shear loading. This book introduces readers to titanium matrix composites (TMCs) with novel network microstructures. The bottleneck problem of extreme brittleness and low strengthening effect surrounding TMCs fabricated by means of powder metallurgy has recently been solved by designing network microstructures, which yield both high strength and superior ductility.
Many researchers have worked on metal matrix composites (MMCs) by powder metallurgy (PM) routes to improve the mechanical, thermal, and electrical properties of the monolithic alloys.
Titanium metal matrix composites (TMCs) have pronounced potential for high strength, excellent heat resistance, and corrosion protection. Titanium metal matrix composites (TMCs) provide an alternative to overcome these shortcomings.
TMCs have been under significant development and evaluation in the past 30 years for use in aircraft engines and airframe applications.
The high specific modulus of TMCs is the main catalyst behind its usage for airframes applications, while the. Raghavan Jayaraman, in Creep and Fatigue in Polymer Matrix Composites (Second Edition), Abstract.
Damage modes such as fiber cracks, matrix yielding, matrix cracks, and fibermatrix interfacial debonding can develop within a lamina. These are referred to as intrinsic damage modes to contrast them with the extrinsic damage modes that develop within a laminate, such as delamination.
The thermomechanical behavior of continuousfiber reinforced titanium based metalmatrix composites (MMC) is studied using the finite element method.
Fiber and interface failures are modeled as. Abstract. An understanding of the dependence of the fibermatrix interface deformation and debonding on residual stresses, the fibermatrix bond strength, and matrix properties under transverse loading conditions is needed for the improvement of the transverse properties of titanium matrix composites (TMC) reinforced with continuous silicon carbide (SiC) fibers.
PROCESSING OF CARBON FIBER REINFORCED TITANIUM MATRIX COMPOSITES C. Arvieu 1,2, 1, B. Guillaume 1, J.L. Bobet 1, J.M. Quenisset 1,2 et P. Chadeyron 3 1 Institut de Chimie de la Matière Condencée  CNRS 2 Laboratoire de Génie Mécanique  IUT Université Bordeaux 1, F Talence Cedex (France) 3 Commissariat à l’Energie Atomique: CEA / CESTA F Le Barp (France).
Toughening of fiberreinforced ceramic composites by fiber pullout relies on mode II debonding at the fiber/matrix interface. This mode II debonding has been analyzed using the strengthbased and the energybased criteria, in which the interfacial shear strength and the interface debond energy are respectively adopted to characterize the debonding behavior.
An analytical micromechanicsbased strength prediction methodology was developed to predict failure of notched metalmatrix composites.
Description Effect of fibermatrix debonding on notched strength of titanium metal matrix composites EPUB
The stress/strain behaviour and notched strength of two metalmatrix composites, boron/aluminium (B/Al) and silicon carbide/titanium. A review of three different methods used at NASA Lewis to account for the effect of fiber bridging on fatigue crack growth (FCG) in metallic and intermetallic titaniumbased composites is presented.
layers in a titanium metal matrix. The matrix is a "superα∀ titanium alloy. The Silicon carbide fibers, the diameter of which is about µm (Fig.
1), are surrounded by a carbon deposit of approximately 2 µm of thickness (Fig. The fiber / matrix debonding arises from the rupture of this zone (Fig.
Titanium metalmatrix composites (TMCs) find applications wherein high specificstrength and modulus, weight reduction, wear and other. Titanium matrix composites (TMC), such as TiV3Cr3Al3Sn (Ti) reinforced with continuous siliconcarbide fibers (SCS6), are being evaluated for use in hypersonic vehicles and advanced gas turbine engines where high strengthtoweight and high stiffnesstoweight ratios at elevated temperatures are critical.
An indentation test technique for compressively loading the ends of individual fibres to produce debonding has been applied to metal, glass, and glassceramic matrix composites; bond strength values at debond initiation are calculated using a finiteelement model.
Results are correlated with composite longitudinal and interlaminar shear behaviour for carbon and Nicalon fibrereinforced. Matrixdamage at the notch tip such as matrix plastic defornmtion, matrix splitting, and fibermatrix debonding reduce the stress concentrations resulting in higher postfatigue residual strengths.
However, in composites containing higher strength matrix materials such as SCS6/TiI,the titanium matrix carries a larger portion of the load. It was observed that weaker interfacial interaction resulted in higher energy absorption. 16, 17 In composites, fibermatrix debonding, cracks, and friction slippage improve energy absorption; this is different from the behavior of noncomposite materials.
However, excessively low interaction and interfacial strength will lead to preballistic. Titanium alloys are also good materials for metal matrix composites (MMC’s). Their main attractions are high strength and stiffness—dependently on the type of reinforcement.
The range of material applications are also related to modern manufacturing and processing technologies. in titaniumbased metalmatrix composites. The finite element model developed here encompasses an interfacial the SCS0 and SCS6 interfaces is related to the debonding between the fiber and matrix.
The results indicate that the fracture strength of the fiber/matrix interface. Typically, the normal strength of the interface can be.
The local stress field is affected also if the fiber break is followed by interfacial debonding. Titanium matrix reinforced with continuous fibers of silicon carbide is chosen as the metal matrix composite system for this study.
Experimental comparisons are made with tension tests conducted using a. The effects of the interfacial bonding strength and the distribution of the fiber on the tensile, impact, flexure, and fatigue properties have been investigated. Different structures and properties of the interface were obtained by heat treatment, thermal cycling from liquid nitrogen temperature to °C, and alloying the matrix.
L.D.
Details Effect of fibermatrix debonding on notched strength of titanium metal matrix composites EPUB
Hurtado and D.H. Allen, Effect of Oxidation on Damage Evolution in Titanium Matrix MMC’s, in the proceedings of the Symposium on Inelasticity and Micromechanics in Metal Matrix Composites, Twelfth U.S. National Congress of Applied Mechanics, Seattle, June 26–July 1, Final laminate response was governed by nonlinear behavior caused by debonding and failure of 0° fibers in conjunction with plasticity in the matrix material.
All fracture surfaces exhibited ductile fracture due to tensile overload. Matrix cracking occurred at loads higher than 80% of the failure strength in the °C tension specimens. @article{osti_, title = {Titanium matrix composites: Mechanical behavior}, author = {Mall, S and Nicholas, T}, abstractNote = {Because of their unique mix of properties and behavior in highperformance applications, Titanium Matrix Composites are presently the focus of special research and development activity.
This new book presents a review of current technology on the mechanical. Dr. Don Adams describes six singlefiber methods for testing fibermatrix interfacial bond strength. Donald F.
Download Effect of fibermatrix debonding on notched strength of titanium metal matrix composites EPUB
Adams is the president of Wyoming Test Fixtures Inc. (Salt Lake City, Utah). He holds a BS and an MS in mechanical engineering and a Ph.D in theoretical and applied mechanics.
Effect of FiberMatrix Debonding on Notched Strength of Titanium MetalMatrix Composites. Evolution of NotchTip Damage in MetalMatrix Composites During Static Loading.
Experimental Verification of a New TwoParameter Fracture Model. Translaminate Fracture of Notched Graphite/Epoxy Laminates.The stressstrain behavior and notched strength of two metal matrix composites, boron/aluminum (B/Al) and siliconcarbide/titanium (SCS6/Ti), were predicted. The prediction methodology combines analytical techniques ranging from a three dimensional finite element analysis of a notched specimen to a micromechanical model of a single fiber.metal matrix composites.
These metals are now produced commercially. Different reinforcement with metal matrix composites are With powder studied. metallurgy processing, the composition of the matrix and the type of reinforcement are independent of one another.
S Jerome, B Ravi Shankar explained in situ Al– TiC (5, 10 and 15 wt.


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