Effect of fiber-matrix debonding on notched strength of titanium metal matrix composites

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National Aeronautics and Space Administration, Langley Research Center, For sale by the National Technical Information Service , Hampton, Va, [Springfield, Va
Metallic composites., Tita
Other titlesEffect of fiber matrix debonding ....
StatementC.A. Bigelow and W.S. Johnson.
SeriesNASA technical memorandum -- 104131.
ContributionsJohnson, W. S., Langley Research Center.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL15359092M

STP Effect of Fiber-Matrix Debonding on Notched Strength of Titanium Metal-Matrix 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 notch-tip 0° fiber correlated well with the specimen static strength when fiber-matrix 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 quasi-static and cyclic. Leon L Shaw, Prasanna Karpur, Theodore E Matikas, Fracture strength and damage progression of the fiber/matrix interfaces in titanium-based 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 fiber-matrix debonding on notched strength of titanium metal matrix composites book were utilized.

This paper presents a fiber-matrix debonding model for metal matrix composites based on a modified Needleman () type cohesive zone model.

In this model the fiber-matrix 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 fiber-matrix 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 continuous-fiber reinforced titanium based metal-matrix composites (MMC) is studied using the finite element method.

Fiber and interface failures are modeled as. Abstract. An understanding of the dependence of the fiber-matrix interface deformation and debonding on residual stresses, the fiber-matrix 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 fiber-reinforced ceramic composites by fiber pullout relies on mode II debonding at the fiber/matrix interface. This mode II debonding has been analyzed using the strength-based and the energy-based criteria, in which the interfacial shear strength and the interface debond energy are respectively adopted to characterize the debonding behavior.

An analytical micromechanics-based strength prediction methodology was developed to predict failure of notched metal-matrix composites.

Description Effect of fiber-matrix debonding on notched strength of titanium metal matrix composites EPUB

The stress/strain behaviour and notched strength of two metal-matrix 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 titanium-based composites is presented.

layers in a titanium metal matrix. The matrix is a "super-α∀ 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 metal-matrix composites (TMCs) find applications wherein high specific-strength and modulus, weight reduction, wear and other. Titanium matrix composites (TMC), such as TiV-3Cr-3Al-3Sn (Ti) reinforced with continuous silicon-carbide fibers (SCS-6), are being evaluated for use in hypersonic vehicles and advanced gas turbine engines where high strength-to-weight and high stiffness-to-weight 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 glass-ceramic matrix composites; bond strength values at debond initiation are calculated using a finite-element model.

Results are correlated with composite longitudinal and interlaminar shear behaviour for carbon and Nicalon fibre-reinforced. Matrixdamage at the notch tip such as matrix plastic defornmtion, matrix splitting, and fiber-matrix debonding reduce the stress concentrations resulting in higher post-fatigue residual strengths.

However, in composites containing higher strength matrix materials such as SCS-6/Ti-I,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, fiber-matrix 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 pre-ballistic. 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 titanium-based metal-matrix composites. The finite element model developed here encompasses an interfacial the SCS-0 and SCS-6 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.


Details Effect of fiber-matrix 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 high-performance 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 single-fiber methods for testing fiber-matrix interfacial bond strength. Donald F.

Download Effect of fiber-matrix 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 Fiber-Matrix Debonding on Notched Strength of Titanium Metal-Matrix Composites. Evolution of Notch-Tip Damage in Metal-Matrix Composites During Static Loading.

Experimental Verification of a New Two-Parameter Fracture Model. Translaminate Fracture of Notched Graphite/Epoxy Laminates.The stress-strain behavior and notched strength of two metal matrix composites, boron/aluminum (B/Al) and silicon-carbide/titanium (SCS-6/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.