||CMES: Computer Modeling in Engineering & Sciences, Vol. 61, No. 2, pp. 111-132, 2010
||Full length paper in PDF format. Size = 510,694 bytes
||Fiber-bridging Constitutive Model, Strain-Hardening Cementitious Composite, Image Analysis, Fiber Distribution.
||In the present work, a micromechanics-based fiber-bridging constitutive model that quantitatively takes into consideration the distribution of fiber orientation and the number of fibers, is derived and a fiber-bridging analysis program is developed. An image processing technique is applied to evaluate the fiber distribution characteristics of four different types of strain-hardening cementitious composites. Then, the fiber-bridging curves obtained from image analysis are compared with those obtained from the assumption of two- and three-dimensional fiber distributions. The calculated ultimate tensile strains are also compared with experimental results. Test results showed that the tensile behavior of strain-hardening cementitious composites can be more accurately predicted and analyzed using the fiber-bridging curve obtained from image analysis.