A peridynamic material model for the analysis of dynamic crack propagation in orthotropic media
By Mazdak Ghajari, L. Iannucci, Paul T. Curtis. 2014
204 citations recorded by the source corpus.
Abstract A new material model for the dynamic fracture analysis of anisotropic materials has been proposed within the framework of the bond-based peridynamic theory. This model enables predicting complex fracture phenomena such as spontaneous crack nucleation and crack branching, curving and arrest, a capability inherited from the bond-based peridynamic theory. An important feature of the model is that the bond properties, i.e. the stiffness constant and critical stretch, are continuous functions of bond orientation in the principal material axes. This facilitates fracture analysis of anisotropic materials with random orientations, such as polycrystalline microstructures. Elastic and fracture behaviour of the model has been verified through simulating uniaxial tension of a composite plate and fracture of a cortical bone compact tension specimen, and making quantitative comparisons to analytical and experimental data. To further demonstrate the capabilities of the proposed model, dynamic fracture of a polycrystalline microstructure (alumina ceramic) has been simulated. The influence of the grain boundary and grain interior fracture energies on the interacting and competing fracture modes of polycrystalline materials, i.e. intergranular and transgranular fracture, has been studied.
Subfields: Civil and Structural Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/5bfebd4c09d06665928cfd59cc028e888d2347ed
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In Civil and Structural Engineering
In Mechanics of Materials
Citations in the corpus
- An improved peridynamic approach for quasi-static elastic deformation and brittle fracture analysis (2015, background): “(21) corresponds to the commonlyused form of the stiffness constant in the previous studies [7,12]”
- A coupled thermo-mechanical bond-based peridynamics for simulating thermal cracking in rocks (2018, background): “…Weckner and Emmrich 2005b), damage and fracture of membranes and fibers (Kilic et al. 2009; Cheng et al. 2018), brittle fracture of polycrystals (Ghajari et al. 2014), failure analysis in concretes (Huang et al. 2015; Yaghoobi and Chorzepa 2015, 2017), crack propagation and coalescence in rocks…”
- Why do cracks branch? A peridynamic investigation of dynamic brittle fracture (2015, methodology): “In anisotropic materials, the micromodulus function c(ξ) is defined by at least two parameters, and various ways to calibrate the models have been proposed (see Xu et al. 2008; Hu et al. 2011, 2012b, 2014; Ghajari et al. 2014; Oterkus and Madenci 2012).”