A lattice discrete element method to model the falling-weight impact test of PMMA specimens

Kosteski, Luís Eduardo; Iturrioz, Ignácio; Cisilino, Adrián P.; D’Ambra, Ricardo José Luis Barrios; Pettarín, Valeria; Fasce, Laura Alejandra; Frontini, Patricia María

doi:10.1016/j.ijimpeng.2015.06.011

Cited by 26 publications

(12 citation statements)

References 25 publications

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“…The nodal coordinates may be updated at each time step, and hence large displacements are accounted for without introducing any modification in the formulation. Therefore, this method is considered as a dynamic model, which allows evaluating dynamic parameters of fracture mechanics, simulating acoustic emission events, impacting tests among other situations.…”

Section: Overview Of the Dem Approach Employed In The Analysismentioning

confidence: 99%

“…A comparison between the simulations and experimental results is made in several works carried out with the same numerical method. Among others, it can be cited here: the work presented by Rios and Riera where the size effect of concrete beam is analysed and a comparison with experimental results is carried out; in Kosteski et al static and dynamic fracture‐mechanics parameters are computed for different problems with the results showing good correlation when compared with theoretical results (obtained with other methodologies) and also to classical experimental tests; in Kosteski et al a reinforced concrete plate was modelled using this method, and the results are compared with experimental ones presenting good agreement; in Kosteski et al an impact test in a PMMA disc was carried out; finally, in Iturrioz et al experiments with concrete structures are performed, and the comparison between then and computational simulations are carried out not only in terms of the conventional results (final configuration or global force vs displacement graphs) but also in terms of acoustic emission.…”

Section: Overview Of the Dem Approach Employed In The Analysismentioning

confidence: 99%

“…This LDEM method was initially considered by Riera to determine the dynamic response of plates and shells when a failure occurs, primarily by shear or tensile under a shock wave from impact loading, as observed in real concrete structures. The LDEM has been successfully used to investigate many structural dynamics problems, among others the shells subject to impulsive loading, the fracture of elastic foundations on soft sand beds, the generation and propagation of an earthquake, the study of the scale effect in concrete and in rock dowels, the computation of fracture parameters in static and dynamic problems, the study of strength of brittle materials under high strain rates, the acoustic emission events in quasi‐brittle materials, and impact in a PMMA disc by a rigid missile . A better description of the LDEM used in this paper is presented in the next section.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The fracture process in quasi‐brittle materials simulated using a lattice dynamical model

Birck

Rinaldi

Iturrioz

2019

Fatigue Fract Eng Mat Struct

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The damage process in quasi‐brittle materials is characterized by the evolution of a micro‐crack field, followed by the joining of micro‐cracks, stress localization and crack instability. In network models, masses are lumped at nodal points which are interconnected by one‐dimensional elements with a bilinear constitutive relation, considering the energy consistency during the simulated process. In order to replicate the material imperfections, to render a realistic behaviour in damage localization, the model has not only random elastic and rupture properties, but also a geometric perturbation. In the present paper 2D plates with different levels of brittleness are simulated. The numerical results are presented in terms of global stress vs strain diagram, final network configuration, energy balance during the process and as geometric damage evolution. Therefore, the predictive potential of the lattice discrete element model to capture fracture processes in quasi‐brittle materials is demonstrated.

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Section: Overview Of the Dem Approach Employed In The Analysismentioning

confidence: 99%

Section: Overview Of the Dem Approach Employed In The Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The fracture process in quasi‐brittle materials simulated using a lattice dynamical model

Birck

Rinaldi

Iturrioz

2019

Fatigue Fract Eng Mat Struct

Self Cite

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“…Dynamic impact resistance test of fabrics and composites was carried out by using drop‐weight testing instrument following ASTM D3763 . Six bar pneumatic pressure was maintained between two circular jaws to grip the test sample.…”

Section: Characterizationmentioning

confidence: 99%

Improving the mechanical properties of p‐aramid fabrics and composites by developing ZnO nanostructures

et al. 2017

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Zinc oxide (ZnO) nanostructures have been grown on p‐aramid (Kevlar) fabric to improve interfacial properties of reinforced composites. Whiskerization technique was adopted to develop ZnO nanostructures, like an array of whiskers, on the surface of Kevlar fabric. Hydrothermal process was used which involves three steps i.e. functionalization, seed layer formation and growth of nanorods. Hexamethylenetetramine and zinc nitrate were used to grow ZnO nanostructures. It was found that pressure controlled autoclave was the best method for generation of nanostructures. It was also observed that the material (fabric) to solution ratio (M:S) significantly affected the morphology and density of developed nanostructures. Incorporation of ZnO nanostructures on Kevlar fabric improved the tensile and impact properties of Kevlar fabric and its composites. The deposition of nanostructures improved the interfacial properties by causing fibers to interlock with matrix thus allowing the formation of a graded interface between the two phases. POLYM. COMPOS., 39:3300–3306, 2018. © 2017 Society of Plastics Engineers

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“…Furthermore, crack openings are very important for analyzing the durability of structures, and quasi-static loading conditions are considered. Hence, we do not use damage degree-based methods such as the phase field method [36][37][38][39], mixed mode model [40][41][42][43], equivalent lattice models [44][45][46][47], and peridynamic-based methods [48][49][50][51]. Finally, we hope that multiple cracks can be efficiently tracked simultaneously and that complicated crack tracking strategies [52,53] can be avoided.…”

Section: Introductionmentioning

confidence: 99%

Applying the Cracking Elements Method for Analyzing the Damaging Processes of Structures with Fissures

Dong

Sun

et al. 2020

Applied Sciences

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In this work, the recently proposed cracking elements method (CEM) is used to simulate the damage processes of structures with initial imperfections. The CEM is built within the framework of the conventional finite element method (FEM) and is formally similar to a special type of finite element. Disconnected piecewise cracks are used to represent the crack paths. With the advantage of the CEM for which both the initiation and propagation of cracks can be captured naturally, we numerically study uniaxial compression tests on specimens with multiple joints and fissures, where the cracks may propagate from the tips or from other unexpected positions. Although uniaxial compression tests are considered, tensile damage criteria are mainly used in the numerical model. On the one hand, the results demonstrate the robustness and effectiveness of the CEM, while, on the other hand, some drawbacks of the present model are demonstrated, indicating directions for future work.

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A lattice discrete element method to model the falling-weight impact test of PMMA specimens

Cited by 26 publications

References 25 publications

The fracture process in quasi‐brittle materials simulated using a lattice dynamical model

The fracture process in quasi‐brittle materials simulated using a lattice dynamical model

Improving the mechanical properties of p‐aramid fabrics and composites by developing ZnO nanostructures

Applying the Cracking Elements Method for Analyzing the Damaging Processes of Structures with Fissures

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