Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Gretchen B. Murri"'
Autor:
Gretchen B. Murri
Publikováno v:
Journal of Composite Materials. 48:2413-2424
Reliable delamination characterization data for laminated composites are needed for input in analytical models of structures to predict delamination onset and growth. The double-cantilevered beam specimen is used to measure fracture toughness, GIc, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16dcbb84ccf79b2ac8a4c3fd9ec93774
https://doi.org/10.1177/0021998313498791
https://doi.org/10.1177/0021998313498791
Autor:
Gretchen B. Murri, Jeffery R. Schaff
Publikováno v:
Composites Science and Technology. 66:499-508
Nonlinear-tapered flexbeam specimens from a full-size composite helicopter rotor hub flexbeam were tested under combined constant axial tension and cyclic bending loads. Two different graphite/glass hybrid configurations tested under cyclic loading f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ab1e54dd51d68815e4b09566913b9f1
https://doi.org/10.1016/j.compscitech.2005.06.010
https://doi.org/10.1016/j.compscitech.2005.06.010
Publikováno v:
Applied Composite Materials. 1:401-413
A simple beam element used at Bell Helicopter was incorporated in the Computational Mechanics Testbed (COMET) finite element code at the Langley Research Center (LaRC) to analyze the responce of tappered laminates typical of flexbeams in composite ro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0ba7054b8b40945688402fd3dd978b3
https://doi.org/10.1007/bf00706501
https://doi.org/10.1007/bf00706501
Publikováno v:
Journal of the American Helicopter Society. 38:29-37
Symmetric tapered laminates with internally dropped plies were tested with two different layups and two materials, S2/SP250 glass/epoxy and IM6/1827I graphite/epoxy. The specimens were loaded in cyclic tension until they delaminated unstably. Each co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a85529f5c302125a9b36cd51888dd49
https://doi.org/10.4050/jahs.38.29
https://doi.org/10.4050/jahs.38.29
Tapered (0 deg) laminates of S2/CE9000 and S2/SP250 glass/epoxies, and IM6/1827I graphite/epoxy were tested in cyclic tension. The specimens usually showed some initial stable delaminations in the tapered region, but these did not affect the stiffnes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0121bb084b8a44c364c298e9ff3ac463
https://doi.org/10.1520/stp17725s
https://doi.org/10.1520/stp17725s
Autor:
Gretchen B. Murri, Roderick H. Martin
Static and fatigue double-cantilever beam (DCB) and end-notch flexure (ENF) tests were conducted to determine the effect of the simulated initial delamination in interlaminar fracture toughness, G(sub c), and fatigue fracture threshold, G(sub th). Un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf13b648685fdc4f469a272ab0721442
https://doi.org/10.1520/stp24734s
https://doi.org/10.1520/stp24734s
Autor:
Gretchen B. Murri, Roderick H. Martin
Composite materials often fail by delamination. The onset and growth of delamination in AS4/PEEK, a tough thermoplastic matrix composite, was characterized for mode 1 and mode 2 loadings, using the Double Cantilever Beam (DCB) and the End Notched Fle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23cd7c2050bc3e32667a5b8b24b0b6ae
https://doi.org/10.1520/stp24115s
https://doi.org/10.1520/stp24115s
Static and cyclic end notched flexure tests were conducted on a graphite epoxy, a glass epoxy, and graphite thermoplastic to determine their interlaminar shear fracture toughness and fatigue thresholds for delamination in terms of limiting values of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe300b6fd9a6f5f511a709bcfcda176d
https://doi.org/10.1520/stp10418s
https://doi.org/10.1520/stp10418s
Publikováno v:
34th Structures, Structural Dynamics and Materials Conference.
This paper describes an optical system developed for materials testing laboratories at NASA Langley Research Center (LaRC) for high resolution monitoring of the transverse displacement and angular rotation of a test specimen installed in an axial-ten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60d8b42e6c2b700e624cdf3daf205533
https://doi.org/10.2514/6.1993-1560
https://doi.org/10.2514/6.1993-1560
Publikováno v:
Journal of the American Helicopter Society. 43:146
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa45d608624d05fc1e4c89ee62746b4d
https://doi.org/10.4050/jahs.43.146
https://doi.org/10.4050/jahs.43.146