Propozycja

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Note added at 3 hrs (2015-05-09 21:05:36 GMT)
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Controlling Factors • Strength in Compression • Strength in ... Carbon Fibers • Hybrid GFRP and CFRP Reinforcement for ..... reinforcing bars and fibers added to the matrix, a modification of the standard expression for nominal ..... work involved several patterns of composite beams and a concrete strength of 14,000 psi
http://ebooks.narotama.ac.id/files/Concrete Construction Eng...

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the standard expression for the extension of straight rod under uniaxial tension, d = PL.
http://personal.stevens.edu/~ffisher/pubs/FTF_Chap3_wavyNT.p...
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reinforcement due to their extraordinary mechanical properties, superior thermal and ... dispersed SWNT/PS composite has been produced, using initial annealing of SWNT ...... matrix, some of the nanotubes are under compression while others are ..... The flexural modulus was then calculated using the standard expression .
https://etd.ohiolink.edu/!etd.send_file?accession=akron11767...

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Note added at 10 hrs (2015-05-10 03:50:06 GMT)
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In support of IRA100's suggestion:


DESIGN EXPRESSIONS
Proceedings of the International Conference on FRP Composites in Civil ... Unfortunately, many of its design expressions and procedures have not been verified

https://books.google.com/books?id=CR_XbtxlA7gC&pg=PA125&lpg=...
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The size-effect has little influence on the effectiveness of externally bonded FRP and thus
empirical design expressions calibrated from small-scale test results should provide reasonable
accuracy
The effective FRP strain used in evaluating the FRP shear contribution can be expressedby two separate design expressions to consider the two predominant failure modes (i.e.,debonding and FRP rupture).

After several trials, the proposed design expression was adjusted
to achieve βr values close to the level targeted by most AASHTO
calibration studies (i.e., βr,target = 3.50).

The effective FRP strain used in evaluating the FRP shear
contribution can be expressed by two separate design expressions
to consider the two predominant failure modes (i.e.,
debonding and FRP rupture). One expression is for members
in which sufficient anchorage is provided (FRP rupture
failure mode), and the other is for members in which insuf-
ficient anchorage is provided (FRP debonding failure mode).

http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_678.pdf