This paper evaluates the mechanical properties, modulus of elasticity (E) and critical stress intensity factor (K_IC), of self–compacting concrete with the addition of hook-ended steel fibers, implementing Digital Image Correlation (DIC) to obtain the horizontal and vertical displacement fields for beams under four-point bending test. Based on the vertical displacements and the crack mouth opening displacement, the values of E and K_IC were obtained from an inverse analysis using Timoshenko beam and the fracture model proposed by Griffith-Irwin. The results obtained allowed to conclude that DIC is a valid and efficient alternative for the characterization of materials.

本文评估了添加钩端钢纤维的自密实混凝土的力学性能，弹性模量（E）和临界应力强度因子（K _IC），实现了数字图像相关（DIC）以获得水平和垂直方向。四点弯曲试验下梁的垂直位移场。基于垂直位移和裂纹张口位移，使用Timoshenko梁和格里菲斯-艾文（Griffith-Irwin）提出的断裂模型通过反分析获得E和K _IC值。获得的结果可以得出结论，DIC是一种有效且有效的材料表征方法。