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UPDATED GOODMAN DIAGRAMS FOR FIBERGLASS COMPOSITE MATERIALS USING THE DOE/MSU FATIGUE DATABASE
Viewed 366 times since Thu, Apr 26, 2012
Recent expansions of the DOE/MSU Composite Fatigue Database permit the construction of a high resolution Goodman Diagram with detailed information at thirteen R-values (minimum stress / maximum stress). This Goodman diagram is the most detailed to... Read More
THE STRESS RATIO EFFECT ON THE FATIGUE LIFE OF CARBON-EPOXY LAMINATE COMPOSITES
Viewed 302 times since Wed, Sep 5, 2012
This paper presents the results of a current research on the fatigue life prediction of carbon/epoxy laminate composites. These laminates are manufactured with twelve woven balanced bidirectional layers of carbon fibres and epoxy resin by vacuum... Read More
The Effect of Loading Parameters on Fatigue of Composite Laminates: Part IV Information Systems
Viewed 237 times since Thu, Jul 26, 2012
Damage tolerance, damage resistance and durability assessments of aircraft composite structures are essential components of certification. The certification procedure requires lengthy experimental validation of those assessments, although much... Read More
Testing and Life Prediction for Composite Rotor Hub Flexbeams
Viewed 337 times since Wed, May 16, 2012
A summary of several studies of delamination in tapered composite laminates with internal ply-drops is presented. Initial studies used 2D FE models to calculate interlaminar stresses at the ply-ending locations in linear tapered laminates under... Read More
Testing and Analysis of Low Cost Composite Materials Under Spectrum Loading and High Cycle Fatigue Conditions
Viewed 295 times since Tue, May 8, 2012
This paper provides an overview of the results of a twelve-year experimental study of low cost composite materials for wind turbine blades. Wind turbines are subjected to 109 or more potentially damaging fatigue cycles over a typical service lifetime... Read More
SIMULATION OF DELAMINATION IN COMPOSITES UNDER QUASI-STATIC AND FATIGUE LOADING USING COHESIVE ZONE MODELS
Viewed 313 times since Thu, Jun 7, 2012
Moreover, the philosophy behind the design of advanced components di®ers from the conventional methodology to design structural components. While the conven- tional approach is based on a strength veri¯cation, i.e, the ability of the structure... Read More
Review of Sonic Fatigue Technology
Viewed 238 times since Mon, Dec 10, 2012
In parallel with the experience being built up in the test programmes, theoretical studies were initiated. Jet -noise studies aimed primarily at reducing noise nuisance were extended into the nearfleld region of the jet to give an increased... Read More
RELIABILITY PREDICTION OF TAPERED COMPOSITES SUBJECTED TO FATIGUE DELAMINATION
Viewed 354 times since Wed, Dec 5, 2012
This paper develops a probabilistic analysis framework incorporating composite design methodologies and reliability estimation techniques to predict the fatigue reliability of composite structures. The methodology is demonstrated on a composite... Read More
OPTIMAT BLADES - OPTIMAL AND RELIABLE USE OF COMPOSITE MATERIALS FOR WIND TURBINES
Viewed 249 times since Wed, Aug 8, 2012
Wind turbine technology provides maturing means of renewable energy production. Maintaining the wind turbine blades’ reliability in a demanding environment, and for ever increasing blade sizes, is an important challenge. For an adequate design,... Read More
MATRIX FATIGUE CRACK DEVELOPMENT IN A NOTCHED CONTINUOUS FIBER SCS-6/Ti-15-3 COMPOSITE
Viewed 232 times since Sun, Mar 3, 2013
Continuous silicon fibers in a titanium matrix provide a high stiffness, high strength composite system. In contrast to polymer matrix composites, the metal matrix carries a significant portion of the load. As fatigue cracks develop in the matrix... Read More
MATRIX CRACKING AND DELAMINATION IN CROSS-PLY LAMINATES IN TENSILE FATIGUE
Viewed 314 times since Wed, Dec 19, 2012
Due to their high specific strength and stiffness fibre-reinforced composite materials are being increasingly used in structural applications where a high level of performance is important (e.g. aerospace, automotive, offshore structures, etc.).... Read More
Life Prediction Methodology for Fatigue Loading of FRP Hybrid Beams
Viewed 271 times since Sat, Apr 13, 2013
Fiber reinforced polymeric (FRP) composites are currently being considered for use in civil infrastructure applications. Advantages over traditional concrete and steel structures include environmental durability and ease of construction due to high... Read More
INTERACTION BETWEEN TRANSVERSE CRACKS AND EDGE DELAMINATION CONSIDERING FREE-EDGE EFFECTS IN COMPOSITE LAMINATES
Viewed 190 times since Sat, Apr 19, 2014
The  high-cycle  fatigue  characteristics, especially  the  initiation  and  propagation  of  edge delamination, were investigated with quasi-isotropic carbon  fiber  reinforced  plastic ... Read More
Impact and Residual Fatigue Behavior of ARALL and AS6/5245 Composite Materials
Viewed 278 times since Tue, Jul 31, 2012
The current effort to make aircraft structures lighter in order to improve operational efficiency and performance has primarily resulted in the greater use of resin matrix composites. The current generation of composites offers many outstanding... Read More
HIGH STRAIN MEASUREMENTS DURING FATIGUE CYCLING IN FIBRE REINFORCED THERMOPLASTIC COMPOSITES USING IMBEDDED DRAW TOWER FIBRE BRAGG GRATING SENSORS
Viewed 223 times since Fri, Apr 5, 2013
High performance carbon fibre reinforced plastics are today more and more employed as structural parts in advanced engineering constructions. Among others they are for instance often used in windmills, helicopters, airplanes and race cars. As... Read More
High Damping Composite Materials - Effect of Structural Hierarchy
Viewed 248 times since Sun, Aug 19, 2012
A combination of stiffness and loss (the product Etan ) is desirable in damping layer and structural damping applications. Composite materials of structure which gives rise to Reuss or Hashin–Shtrikman lower bound behavior can give rise to such... Read More
FATIGUE DAMAGE IN WOVEN CARBON FABRIC/EPOXY LAMINATES AT NON-AMBIENT TEMPERATURES
Viewed 191 times since Sat, Apr 19, 2014
Due to their increasing use under cyclic loading conditions, fatigue studies in Carbon Fiber Reinforced Plastics (CFRPs) have been a focus ofconsiderable attention in recent decades. Under cyclic loading these materials exhibit extremely complex... Read More
ELEVATED TEMPERATURE STATIC FATIGUE OF A NICALON FIBER-REINFORCED SiC COMPOSITE
Viewed 254 times since Sun, Mar 4, 2012
Static fatigue tests of a Nicalon fiber-reinforced SiC matrix composite were conducted in four-point bending over a temperature range of 425° to 1150°C in air at selected stress levels. The composite consisted of a Nicalon cloth with a 0.3 J.Lm... Read More
DURABILITY OF HYBRID FIBER METAL COMPOSITE LAMINATES
Viewed 372 times since Sat, Jan 7, 2012
Fatigue damage growth has been studied experimentally in TiGr (Titanium alloy/graphite fiber-reinforced polymer matrix composite) and GLARE (Aluminum alloy/glass fiber reinforced polymer matrix composite). In both materials the key damage mechanism... Read More
Development of a Fatigue-Life Methodology for Composite Structures Subjected to Out-of-Plane Load Components
Viewed 309 times since Wed, Jan 4, 2012
This report documents the efforts of the RSRAIX-Wing Project Office to identify and implement a fatigue-life methodology applicable to demonstrated delamination failures for use in certifying composite rotor blades. The RSRAIX-Wing vehicle was a... Read More
Cryogenic fatigue behavior of plain weave glass/epoxy composite laminates under tension–tension cycling
Viewed 289 times since Sat, Nov 26, 2011
This paper focuses on understanding the tension–tension fatigue behavior of woven glass fiber reinforced polymer laminates at cryogenic temperatures. Tension–tension fatigue tests at frequencies of 4 and 10 Hz with a stress ratio of 0.1 were... Read More
Behaviour of E-glass fibre reinforced vinylester resin composites under impact fatigue
Viewed 326 times since Tue, Sep 20, 2011
An impact fatigue study has been made for the first time on 63×5% glass fibre reinforced vinylester resin notched composites. The study was conducted in a pendulum type repeated impact apparatus especially designed and fabricated for... Read More
Application of a stress-corrosion-cracking model to an analysis of the durability of glass/epoxy composites in wet environments
Viewed 322 times since Sat, Oct 8, 2011
A stress-corrosion-cracking (S.C.C.) model has been applied to an analysis of the flexural fatigue behaviour of water-aged unidirectional glass/epoxy composites. The approach has been restricted to the initial stages of the fatigue life, i.e. when... Read More
An Investigation of the Fatigue Induced Failure Modes of Fiber/Elastomer Composites as Bearing Surfaces in Total Hip Joint Prosthesis
Viewed 291 times since Mon, Oct 3, 2011
It is proposed to use elastomeric composites as artificial joint bearing surfaces to increase their fluid film lubrication and therefore reduce the number of failures which have been attributed to wear mechanisms. The fluid generated... Read More
ACCELERATED FATIGUE PROPERTIES OF SINGLE-FIBER COMPOSITES
Viewed 303 times since Tue, Sep 13, 2011
Polymer resins exhibit viscoelastic behavior not only above the glass transition temperature but also below this temperature. It has been confirmed that composite materials using polymer resins as matrices have this viscoelastic behavior.... Read More
A new coupled approach of residual stiffness and strength for fatigue of fibre-reinforced composites
Viewed 299 times since Wed, Sep 7, 2011
Fibre-reinforced polymers are made of reinforcing fibres embedded in a polymer matrix.  Read More
A MODIFIED THREE-RAIL SHEAR TEST FOR FATIGUE OF COMPOSITE LAMINATES
Viewed 521 times since Mon, Sep 5, 2011
In the standard three-rail shear test, as described in "ASTM D 4255/D 4255M The standard test method for in-plane shear properties of polymer matrix composite materials by the rail shear method” the specimen is clamped with bolts. This... Read More
A MODEL FOR DAMAGE PREDICTION IN POLIMER MATRIX COMPOSITES SUBJECTED TO BENDING FATIGUE LOADING
Viewed 514 times since Thu, Sep 1, 2011
The proposed model predicts the damage progress to fatigue failure in cyclic loaded woven composite materials. The relative stiffness is changing per cyclic loading at given stress or strain levels. The correlation between the stiffness degradation... Read More
A HYBRID MODEL FOR FATIGUE LIFE ESTIMATION OF POLYMER MATRIX COMPOSITES
Viewed 346 times since Wed, Aug 31, 2011
A major limitation of current fatigue life prediction methods for polymer matrix composite laminates is that they rely on empirical S-N data. In contrast to fatigue life prediction methods for metals which are based on physical crack growth... Read More