Abstract
In an attempt to evaluate failure theories for a glass fabric reinforced polyester resin over 370 tests have been conducted on thin-walled tubes under combined axial loading and internal pressure, both for static and fatigue loading. For plane stress the results are considered in relation to imaginary failure surfaces inσ 1,σ 2,σ 6 space. A limited measure of agreement between theories and results can be obtained after highly subjective selection of data. Only those theories which involve complex stress properties provide a reasonable fit. The behaviour of tubular specimens is strongly influenced by the presence of joints in the reinforcements.
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Abbreviations
- σ x ,σ y :
-
nominal hoop and axial (principal) stresses in a thin-walled tube
- σ 1,σ 2,σ 6 :
-
normal and shear stresses in the direction of the principal material axes
- F 1,F 2,F 6 :
-
strengths in the principal material directions and the in-plane shear strength
- F 1t,F 2t :
-
tensile strengths in the principal material directions
- F 1c,F 2c :
-
compressive strengths in the principal material directions
- K 2 :
-
a constant evaluated from a combined stress test
- H 12 :
-
normal stress interaction component of a strength tensor
- α :
-
off-axis angle
- S-N curve:
-
conventional stress-log life fatigue curve
- R :
-
principal stress ratio,σ y /gs x
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Owen, M.J., Griffiths, J.R. Evaluation of biaxial stress failure surfaces for a glass fabric reinforced polyester resin under static and fatigue loading. J Mater Sci 13, 1521–1537 (1978). https://doi.org/10.1007/BF00553209
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DOI: https://doi.org/10.1007/BF00553209