Phase field modeling scheme with mesostructure for crack propagation in concrete composite

Discrete Lattice Element Model for Fracture Propagation with Improved Elastic Response

“…Thus, the proposed lattice model effectively simulates deformations related to a continuum response in the linear elastic regime, while the fracture behavior is governed by the internal heterogeneity within the network, rendering it robust in terms of crack propagation. The uniaxial tension test failure mechanism computed with the proposed model aligns well with the phase-field simulation of concrete failure presented in [45], where the crack is perpendicular to the direction of tensile loading, while its morphology corresponds to concrete internal heterogeneities.…”

“…sponse in the linear elastic regime, while the fracture behavior is governed by the internal heterogeneity within the network, rendering it robust in terms of crack propagation. The uniaxial tension test failure mechanism computed with the proposed model aligns well with the phase-field simulation of concrete failure presented in [45], where the crack is perpendicular to the direction of tensile loading, while its morphology corresponds to concrete internal heterogeneities. While the global fractures leading to the specimen's total failure exhibit slight variations due to inherent variability, the overall global responses in terms of softening and dissipated energy remain very close to each other, as depicted in Figure 11.…”

“…The diagonal form of the dominant crack in the uniaxial compression test is typical for quasi-brittle materials such as concrete, as shown in the experiment provided The final failure patterns illustrated in Figure 17 reveal a typical uniaxial compression test failure mechanism, where the dominant macro-crack takes a diagonal form due to shear sliding. The diagonal form of the dominant crack in the uniaxial compression test is typical for quasi-brittle materials such as concrete, as shown in the experiment provided in [45]. Similar failure patterns are observed with both meshes, although the length and gle of the macro-cracks exhibit slight differences due to internal randomness.…”

“…Comparison of results for compression test for two different meshes.The final failure patterns illustrated in Figure17reveal a typical uniaxial compres test failure mechanism, where the dominant macro-crack takes a diagonal form du shear sliding. The diagonal form of the dominant crack in the uniaxial compression te typical for quasi-brittle materials such as concrete, as shown in the experiment provi in[45].…”