A multiscale experimental approach for correlating global and local deformation response in woven compositesComposite Structures (2018)
A multiscale experimental approach is introduced that facilitates correlating globally applied stress to the local material response at yarn scale. Using a high-resolution optical digital image correlation, low and high strain zones in off-axis woven composite samples loaded in uniaxial tension are identified and the corresponding full-field strains are quantified. The local strain response quantified over low and high strain domains are used along with the continuum scale deformation to establish a correlation between global and local deformation behavior as a function of fiber orientation. In addition, global stress-local strain curves are extracted for low and high strain domains at different fiber orientation angles. A simple plasticity model in conjunction with the obtained stress-strain curves is implemented and utilized to develop a phenomenological model that enables correlating global stress with the locally developed strain at different locations in a composite specimen subjected to off-axis tensile load.
Publication DateJune 1, 2018
Citation InformationBehrad Koohbor, Suraj Ravindran and Addis Kidane. "A multiscale experimental approach for correlating global and local deformation response in woven composites" Composite Structures Vol. 194 (2018) p. 328 - 334
Available at: http://works.bepress.com/behrad-koohbor/13/