The effects of compressive preloads on the compression-after-impact strength of carbon/epoxy
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The effects of compressive preloads on the compression-after-impact strength of carbon/epoxy

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Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C, Springfield, Va .
Written in English

Subjects:

  • Impact strength,
  • Epoxy matrix composites,
  • Prestressing,
  • Strain distribution,
  • Impact tests,
  • Compression loads,
  • Compressive strength

Book details:

Edition Notes

StatementAlan T. Nettles.
SeriesNASA-TM -- 111879., NASA technical memorandum -- 111879.
ContributionsUnited States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17834464M
OCLC/WorldCa39618369

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A preloading device was used to examine the effects of compressive prestress on the compression-after-impact (CAI) strength of ply, quasi-isotropic carbon epoxy test coupons. The Effects of Compressive Preloads on the Compression-After-Impact Strength of Carbon/Epoxy. By Alan T. Nettles. Abstract. A fixture to apply compressive loads to composite specimens during an impact event was used to assess the effect of prestresses on the compression-after-impact (CAI) strength of 16 ply quasi-isotropic carbon/epoxy test Author: Alan T. Nettles. Effects of compressive preload on impact damage performance of composite laminates: JI Zhaojie, GUAN Zhidong, LI Zengshan, TAN Riming: School of Aeronautical Science and Engineering, Beihang University, Beijing , China. The effect of tow gaps on compression after impact strength of robotically laminated structures A. T. Rhead 1, T. J. Dodwell and R. Butler1* Abstract When (robotic) Automated Fibre Placement (AFP) is used to manufacture aerospace components with complex three dimensional geometries, gaps between fibre tows can : A. T. Rhead, T. J. Dodwell, R. Butler.

  Compression after impact strength of thin laminates with various percentage of 0° plies Show all authors. The effect of stacking sequence in impact damage in a carbon fiber/epoxy composite. Standard test method for open-hole compressive strength of Cited by: 4. The results of compression tests are shown in Figure(8) where experimental compressive strength (X c) normalized by the compressive strength of UD carbon (Xb c), calculated for 2 imperfection using Budiansky’s model11 (Xb c = G m=(1 + ˚ m)), is plotted against R d in Figure(8-a) and Figure(8-b). One outlier in the data corresponds to BD3. The effect of these geometrical imperfections on the compressive strength of the laminate will be studied here. Several authors have addressed the problem of a composite containing dropped plies and loaded in tension by analysing the entire cross-sectional element containing the terminated plies. Fish and Lee [7] concluded that the. and T / carbon/epoxy Lo and Chim used the most common data sets available in the literature (even for the same material, the literature contains many variations in reported strengths) Compressive strength data for the E-glass composite Fiber Volume Fraction, Vf Longitudinal Compressive Strength, Xc[MPa] File Size: KB.

THE EFFECTS OF COMPRESSIVE PRELOADS ON THE COMPRESSION-AFTER-IMPACT STRENGTH OF CARBON/EPOXY Alan T. Nettles NASA, Marshall Space Flight Center Mail Zone Eit33 Huntsville, AL ABSTRACT A fixture to apply compressive loads to composite specimens during an impact event wasFile Size: KB. A preloading device was used to examine the effects of compressive prestress on the compression-after-impact (CAI) strength of ply, quasi-isotropic carbon epoxy test coupons. T/ material was evaluated at preloads from to lb at impact energies from 1 to 9 : D. G. Lance and A. T. Nettles. Charpy and Izod impact tests on unidirectional composites and common structural alloys are given in Table Among the composites, impact resistance is strongly influenced by the ductility or strain to fracture of the fiber. This can be seen in Table where the S-glass composite has very high impact resistance, while high modulus carbon File Size: KB. The effect of a misalignment angle between the fibres and loading axis of a unidirectional composite is analysed by considering the shear strains induced by the misalignment. It is shown that shear instability in the matrix drastically reduces the predicted compressive strength even for very small by: