Measurement and characterization of mixed mode fracture in concrete
نویسندگان
چکیده
The Mixed Mode fracture behavior of concrete is measured and characterized by investigating a single crack in a double-notched specimen. To obtain the characterization a very stiff biaxial test set-up with a closed loop control is constructed. The opening and sliding components of the Mixed Mode displacement are measured using a specially designed orthogonal gauge, and the measurements are used directly as the closed loop control signals. The closed loop control leads to an accurate and precise control and determination of the Mixed Mode phenomenon. A high-resolution Digital Image Correlation system, which is used for the determination of the displacement field in the close vicinity of the crack, supports the directly measured Mixed Mode behavior. Results are reported for a range of Mixed Mode angles.
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