Fracture behavior of textile glass fiber reinforced polymer concrete according to mixed-mode

Textile glass fiber reinforced particle-filled polymer composite beams which have different weight fractions of glass fibers were produced with varying notch-to-depth ratios. The mechanical properties of specimens were found. The specimens were investigated in Mode I and Mode III fracture behavior using three-point bending (TPB) tests. Textile glass fiber contents used were 1, 2 and 3%, and polyester content was 16.5% of the total weight of the polymer composite system. The critical stress intensity factor was determined by using a compliance technique, the initial notch depth method and the J-integral method. Effects of crack angles on fracture behavior were also studied. The specimens, which have an inclined crack at an angle theta to the axis of the specimens, were used to carry out the tests. The specimens were tested with inclination angles 30A, 45A, 60A and 75A. The results are compared with the values of KIC obtained using conventional (theta = 90A) specimens. In addition, J-integrals were also determined.