... in the test protocol before standardization, are discussed in this paper. 20 05 2003 27 08 2003 delamination composite fracture toughness mixed-mode MMB testing References Reeder , J. R. and Crews , J. H.   Jr. , “ Mixed-Mole Bending Method for Delamination Testing...

...J Noh; J Whitcomb The use of advanced composite materials for cryogenic fuel tanks reduces the mass of the structure but the leakage of fuel can become a problem. Since the amount of leakage will increase with crack opening volume, it is essential that we understand the factors that affect...

... damping in the damaged zone. These variations in the local mechanical properties could result in changing vibration characteristics of the beam. The variations in the system characteristic could then be used to assess the structural integrity of the composite beam. A cantilever beam made of a glass fiber...

...M Gentz; D Armentrout; P Rupnowski; L Kumosa; JK Sutter; M Kumosa Failure and stiffness properties of a woven 8 harness satin (8HS) graphite/PMR-15 composite have been investigated at room temperature and at 315°C by performing the ±45° tensile and Iosipescu tests. Acoustic emission has been...

... breadboard. Several parameters of the test fixture and system's geometry needed to be adjusted before usable fringe patterns were obtained, and the system's resolution and range were determined. The ESPI system was then reconfigured for use with composite specimens subjected to quasi-static loading. Results...

...LG Melin; JM Neumeister; KB Pettersson; H Johansson; LE Asp Four methods to determine composite interlaminar shear strength (ILSS) are evaluated. In particular, the recently devised inclined double-notch shear test (IDNS) is compared with three existing and more established methods: the Iosipescu...

... exhibits a good agreement. Sylvie Yotte1 and Jean Michel Quenisset1 Numerically Based Compliance Calibration for Steel Frame Assisted Tension Specimen REFERENCE: Yotte, S. and Quenissett, J. M., Numerically Based Compliance Calibration for Steel Frame Assisted Tension Specimen, Journal of Composites...

...OI Okoli; GF Smith High strain rate characterization of polymer composite materials has been limited due to difficulties in the measuring equipment. In particular, jigs and fixtures can be subject to inertial disturbances present at speeds up to and above 2 m/s. These disturbances are due...

...LR Lawson; EY Chen This paper examines aspects of the distribution of the longest possible microcracks in specimens of a fatigued aluminum-matrix silicon carbide whisker composite and the probability of coalescence in general. The length of the longest microcracks in this material is determined...

...JR Calcaterra; S Mall; A Ruiz This study investigates the residual strength degradation of cross-ply, SCS-6/Ti-15-3 titanium matrix composite (TMC) due to elevated temperature fatigue. To accomplish this, several specimens were cycled at 427°C to certain fractions of their expected fatigue lives...

...NS Wheeler; DS Lashmore An electrodeposited cobalt alloy coating having a composition of 7.1 ± 0.8 at % tungsten was developed to serve as a diffusion barrier between graphite fibers and nickel. A nickel matrix was electrodeposited around the fibers, and the resulting composite was annealed...

... and strength-to-weight ratios of advanced composites, combined with their inherent corrosion resistance, environmental durability, and tailorability make them attractive for use in infrastructure renewal. In this paper, we investigate the effect of environmental exposure on the strengthening efficiency...

... of Graphite/Epoxy Plates," Journal of Composites Technology & Research, JCTRER, Vol. 17, No. 2, April 1995, pp. 125-133. ABSTRACT: Bolted graphite/epoxy plates were subjected to in-plane biaxial loading. Cruciform shape samples were used, Testing was performed on a biaxial machine developed and built...

... E, "A StatisticalAnalysisofBushing, Sleeve,and Oversize Hole Effects on the Bolted Joint Strength of Graphite/Epoxy Laminates," Journalof Composites Technology& Research, JCTRER, Vol. 17, No. 1, January 1995, pp. 17-32. ABSTRACT: A test program was conducted to determine the influence of metallic...

.... However, at high crack densities, this is not the case. This additional stiffness reduction at high crack densities indicates the presence of new damage types, such as branched cracks and local delamination. Janis Varna ~ and Lars A. Berglund ~* Thermo-Elastic Properties of Composite Laminates...

...CM Pastore; YA Gowayed A method for predicting the elastic properties of textile-reinforced composites is presented with applications. The method is a modification of a Fabric Geometry Model (FGM) [ 1–3 ] that relates fiber architecture and material properties of textile-reinforced composites...

...NK Naik; VK Ganesh A two-dimensional (2-D) woven fabric composite strength model is presented for the prediction of in-plane shear strength of 2-D orthogonal plain weave fabric laminates under inplane shear loading. The shear strength studies were carried out for three idealized laminate...

...BM Hillberry; WS Johnson In this study the extensive matrix fatigue cracking that has been observed in notched SCS-6/Ti-15-3 composites is investigated. Away from the notch a uniform spacing of the fatigue cracks develop. Closer to the notch, fiber-matrix debonding occurs, increasing distance...

... and Local Delamination in (0/0/-O)s Graphite Epoxy Laminates Under Tensile Load REFERENCE: Salpekar, S. A. and O'Brien, T. K., "Analysis of Matrix Cracking and Local Delamination in (0/0/- 0), Graphite Epoxy Laminates Under Tensile Load," Journal of Composites Technology & Research, JCTRER, Vol. 15, No. 2...