by National Aeronautics and Space Administration, Langley Research Center in Hampton, Va .
Written in English
Microfiche. [Washington, D.C. : National Aeronautics and Space Administration], 1986. 1 microfiche.
|Statement||W. S. Johnson and P. D. Mangalgiri.|
|Series||NASA technical memorandum -- 87716.|
|Contributions||Mangalgiri, P. D., Langley Research Center.|
|The Physical Object|
The dependence of R-curves on the geometry of double cantilever beam (DCB) specimens was investigated for a unidirectional epoxy–carbon ed bridging was observed during the crack propagation and R-curves for three different thicknesses were obtained.A simple numerical procedure was proposed for the crack propagation modeling by taking into account linear and Cited by: This work investigates the interlaminar fracture and fiber-bridging in double-cantilever beam specimens from the theoretical and experimental points of view. Crack initiation and propagation tests were performed on unidirectional E-glass/polyester double-cantilever beam by: Beam analysis of the double cantilever beam specimen with fibre bridging Article in Journal of Composite Materials 49(14) May with 16 Reads How we measure 'reads'. Abstract. Consider a Double-Cantilever Beam (DCB) specimen, made of a brittle polymeric material (PMMA) (Figure 1). Under the hypothesis of sufficient slenderness of the beam (a 0» h), the classical theory of cantilever beams in bending can be adopted (u = 2Pa 3 /3EI, I = th 3 /12).Cited by: 1.
Automatic Optical Crack Tracking for Double Cantilever Beam Specimens Article in Experimental Techniques 40(3) June with Reads How we measure 'reads'. 4. Results and Discussions. Fracture analysis has been carried out on the double cantilever beam specimens made of glass/epoxy of three different layups, namely, [0°] 6, [±45°] 3 and [0°/90°] 3, with midplane Table 1 to Table 3, it has been observed that the fracture toughness of [0°] 6 is higher than [±45°] 3 and [0°/90°] 3 by: Szekréyes and Uj have investigated the interlaminar fracture and fiber-bridging in double-cantilever unidirectional beam specimens from theoretical and experimental points of view. They have stated that the well-known classical beam theory-based solution agrees excellently with the experimental results in the case of crack initiation tests Author: Sylwester Samborski, Adrian Gliszczynski, Jakub Rzeczkowski, Nina Wiacek. The combination of this work, an earlier study  concerning the effects of thermo-oxidative aging on the thermal, fracture and compressive behavior of carbon-fiber reinforced epoxy composites, and a companion paper  discussing the failure mechanisms due to thermo-oxidative aging provide the first published comprehensive study of the effects of long-term thermo-oxidative aging on such a Cited by:
Al-lami, Karrar Ali, "Experimental Investigation of Fiber Reinforced Concrete Beams" ().Dissertations and /etd Experimental Investigation of Fiber Reinforced Concrete Beams by Karrar Ali Al-lami A thesis submitted in partial fulfillment of the beam specimens. Two of the beams were control specimens in. values from crack length data using a double cantilever beam (DCB) specimen. In this study, a custom computer program with edge detection software rapidly, automatically, and accurately tracks the crack front in translucent DCB specimens by optically monitoring dissimilarities between delaminated and intact portions of the sample. Stress Corrosion Cracking Tests Using Double-Cantilever-Beam Specimens Ajit Roy Octo This is an informal report intended primarily for internal or limited external. distribution. The opinions and conclusions stated are those of the author and may or may not be those of the by: 1. In this work, an iterative methodology based on internal strain measurements and parametric finite element modeling is employed to identify the contribution of fiber bridging to delamination resistance of unidirectional carbon fiber/epoxy laminates. Double cantilever beam specimens with integrated arrays of wavelength-multiplexed fiber Bragg Author: Ebrahim Farmand-Ashtiani, Joël Cugnoni, John Botsis.