A Study on the Size Effects of Mixed Mode Fracture on Reinforced Concrete Beams Using Linear Elastic Fracture Mechanics
The IUP Journal of Structural Engineering, Vol. XI, No. 4, October 2018, pp. 60-73
Posted: 23 May 2019
Date Written: October 6, 2018
Mechanics related to the study of propagation of cracks is known as fracture mechanics. Presence of cracks decreases the lifetime for which the structure is designed. Thus, crack propagation ought to be studied essentially to understand the stability of structures. Each structure contains inherent defects either miniaturized scale breaks or some other kind of split in concrete. So, it is very important to understand the behavior of the materials in order to predict crack propagation in the concrete. Fracture mechanics plays a very important role in dealing with such problems related to cracks in concrete. To be accurate in the analysis, it considers elasticity and plasticity in order to find out the macroscopic mechanical behavior of the materials. The load deflection of the crack of the beam is mainly due to stress crack opening relation. The results obtained from the various tests are sensitive from the production of the beam specimens and the execution of the tests depends on the size of the beams. It is observed from tests that the various size effects of the beam changes depend on the length and other parameters. The parameters may greatly vary as the size of the beam varies from higher to lower.
Keywords: Mixed mode fracture, Stress intensity factor, Size effects of beams
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