Posted: January 20th, 2009 | Author: G. Cusatis | Filed under: II.1 Research Highlights | No Comments »
This figure depicts the setup of the mixed-mode fracture test in which a double notched prismatic panel was loaded in tension (T) and shear (S). The shear load was applied first up to a shear force close to the force capacity; then the tension was applied under displacement control keeping the shear load constant. The numerical simulation shows the typical curved cracks propagating from the notch tips towards the opposite side of the specimens.
Simulation of mixed mode fracture propagation in concrete panels
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Posted: January 19th, 2009 | Author: G. Cusatis | Filed under: II.1 Research Highlights | No Comments »
This example is relevant to transitional thermal creep tests in which the temperature is changed during the application of sustained load. In addition, the specimen undergoes drying due to an environmental 50% relative humidity. The figure shows the comparison between the experimental and numerical results. The basic creep curve relevant to sealed conditions and constant temperature is also reported for comparison. The difference between the total strain measured under load and the total strain measured on a load-free companion specimen is used as a measure of creep strain. The numerical model correctly predict the increase of creep deformation due to humidity and temperature transient conditions.
creep strain versus time under temeperature and humidity variation
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