Abstract
One of the main issues in block design is the prediction of possible areas of crack formation and their further spread. In structural elements, one of the possible places of crack formation is stress concentrators, because, under an external load, significant local stresses arise in the cross-sections of such parts, which can lead to their destruction. This article discusses possible ways to refine the section to reduce the stress concentration in places of a sharp change in the section of the block. After modeling the distribution of the main stresses in the section in the Abaqus program, it was revealed that with a radius of rounding at the inner corners of the block cells, the maximum values of the main tensile stresses decrease significantly, as does their distribution zone. At the same time, the maximum values of the main compressive stresses increase slightly, and their distribution area increases significantly.
Highlights
One of the stages in the modern design of structures for various purposes is the forecast of their strength, endurance and reliability, taking into accounts the hydrogeological conditions and hydrophysical soil properties of the construction territory [1, 2]
In [9], a new approach is proposed for modeling the mechanism of crack formation based on the study of the cohesive zone model (CZM)
The study [12] is devoted to the method of large-scale mechanical crack growth based on the parametric finite element submodel
Summary
One of the stages in the modern design of structures for various purposes is the forecast of their strength, endurance and reliability, taking into accounts the hydrogeological conditions and hydrophysical soil properties of the construction territory [1, 2]. During this process, potential places of formation and further growth of cracks are analyzed, since they lead to the destruction of the designed objects. Finite element analysis (FE) was used taking into account the Drucker-Prager criterion, which was carried out using ABAQUS to predict the ultimate bearing capacity and the failure mode of masonry beams. The study [15] presented a numerical study of composite walls made of reinforced concrete structures using the ABAQUS universal finite element program (FE)
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