How Is Transverse Tensile Strength Measured in Micron-Sized Fibers?

[RGClark]

How is tranverse tensile strength defined? How is it measured for thin fibers?
Some high strength fibers such as carbon fibers have longitudinal tensile strength of 1,000,000 psi. But these fibers have diameters that measure in the microns. How could a transverse tensile strength be measured in that case?


Bob Clark

 

[PerennialII]

I'd say they're not measured ... you work with lamina properties and this way eliminate the 'need' to work with composite constituent properties. What is & can be done for single fibers is unidirectional tensile testing, for example according to ASTM D3379.