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- Article name
- Experimental identification of distribution laws for bending characteristics of differently textured structural carbon fiber composites for various molding regimes
- Authors
- ADAMOV A. A., , adamov@icmm.ru, Institute of Continuous Media Mechanics of the UB RAS, Perm, Russia
LAPTEV M. Yu., , laptev-mu@mail.ru, Institute of Continuous Media Mechanics of the UB RAS, Perm, Russia
- Keywords
- mechanical tests / three-point bend / polymer composite materials / molding regimes / Young's modulus / ultimate strength / maximum bending deformation / distribution laws / verification of statistical hypotheses
- Year
- 2015 Issue 4 Pages 66 - 73
- Code EDN
- Code DOI
- Abstract
- Nine groups of specimens (quantity of specimens in party 69-97 items) made of polymer composite materials (textile-based carbon fiber and unidirectional carbon fiber) consisting of mono-layers of thickness of 0.19-0.24 mm subjected to three-point bending tests for various molding regimes were investigated. Tests complying with ASTM D7264 standards were performed at room temperature (23±2) оС. By deformation curve determines the effective Young's modulus, ultimate strength and maximum bending deformation for each specimen. Based on statistical analysis of mechanical characteristics appropriate histograms were plotted, distribution laws for random variables of each sampling were identified, and statistical hypotheses regarding the equality of average values of characteristics over the sampling were verified for various molding regimes. A probabilistic assessment of effect of technological factors on the mechanical characteristics of polymer composite materials tested is given. The results can be used for development of probabilistic calculation methods that to allows to assess reliability of structural elements made of polymer composite materials.
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