Fracture criteria applied to numerical simulation of

Special Issue Numerical Modelling and Simulation of Metal

The numerical simulation of metal processing,coupled with the modelling of the structural evolution allows to reduce time and cost expensive tests at lab and industrial scale.Here,multi-scale modelling is an appropriate means to describe the development of the nano,micro and macro structure and,hence,to determine the local materials Quantitative prediction of fracture distribution of Key words:Longmaxi Formation;FEM numerical simulation;structural stress f.ield;fracture .prediction.E-mail:[email protected] Introduction .In recent years,a variety of fracture prediction methods have been widely applied,among which the .finite-element numerical simulation of the tectonic stress field is the most commonly used (Wei et al.,Previous123456NextNumerical Simulation of Fracture Behavior of Brittle This study used numerical analysis to carry out a large number of numerical model calculations based on a new semicircular bend (SCB) model.Instead of existing numerical computation methods ( J -integral),the M -integral method was used to calculate the mixed mode fracture parameters ( K I ,K II ,and Fracture criteria applied to numerical simulation ofgt;K Fracture criteria applied to numerical simulation oflt;/i Fracture criteria applied to numerical simulation ofgt; Fracture criteria applied to numerical simulation oflt;sub Fracture criteria applied to numerical simulation ofgt;III Fracture criteria applied to numerical simulation oflt;/sub Fracture criteria applied to numerical simulation ofgt;),investigate the influence of the geometry and material parameters

Prediction of ductile fracture on 6016-T4 aluminum alloy

Oct 23,2020 Fracture criteria applied to numerical simulation of#0183;Forcedisplacement curves between experiment and simulation were compared to validate the accuracy of these ductile fracture criteria.For further validation,the plastic model and ductile fracture criteria were applied to predict the fracture of an AA6016-T4 automobile inner panel in drawing forming in Sect.6.Numerical simulation of shear fracture - SAIMMNumerical simulation of shear fracture evolution in laboratory-scale samples placed between the frame and the plates.Vertical loads were applied by the piston of a compressive testing machine.Most of the tests were performed on sandstone samples.Three samples of quartzite were tested at different confining stresses C13 Unconfined (static test)Numerical simulation of multiple crack growth in brittle Aug 23,2010 Fracture criteria applied to numerical simulation of#0183;Baijian Wu,Zhaoxia Li,Keke Tang,Numerical modeling on micro-to-macro evolution of crack network for concrete materials,Theoretical and Applied Fracture Mechanics,10.1016/j.tafmec.2020.102525,(102525),(2020).

Numerical simulation of fatigue processes.Application to

The only value that is not contained between the experimental results is the one corresponding to an applied strain range of 3.5% However,the value provided by the numerical simulation looks more coherent than the one obtained with the experimental test,as the number of cycles obtained in the experimental test is larger than the one obtained Numerical simulation of dynamic fracture toughness tests The local stress fracture criterion RKR reported by Ritchie et al.is adopted to determine the initiation time $$t_{f}$$ using numerical simulation.The RKR criterion proposes that the crack begins to propagate if the normal stress $$\sigma_{yy}$$ perpendicular to the crack surface at a certain distance $$d_{c}$$ ahead of the crack tip reaches Numerical simulation of crack propagation under fatigue Numerical simulation of crack propagation under fatigue loading in piezoelectric material using extended finite element method have been evaluated by interaction integral approach using the asymptotic crack tip fields.Crack propagation criteria have been applied to predict propagation and finally the failure. Z.-K.,Soh,A.K.and Lee

Numerical simulation of crack propagation under fatigue

Numerical simulation of crack propagation under fatigue loading in piezoelectric material using extended finite element method have been evaluated by interaction integral approach using the asymptotic crack tip fields.Crack propagation criteria have been applied to predict propagation and finally the failure. Z.-K.,Soh,A.K.and Lee Numerical simulation of crack curving and branching in Nov 01,2016 Fracture criteria applied to numerical simulation of#0183;The extended NOSB-PD is applied to simulate and investigated dynamic brittle fracture.Numerical convergence of NOSB-PD is investigated.Effects of geometric and loading conditions on crack curving and branching are studied.Effects of non-overlapping length on crack branching and coalescence are analyzed.Numerical investigation of complex fracture network Jun 15,2020 Fracture criteria applied to numerical simulation of#0183;Some scholars have adopted numerical simulation and experiments to analyze the influence of natural fractures on hydraulic fractures and the controlling factors of the formation of fracture networks,,.However,the comprehensive influencing factors of fracture propagation by cyclic pumping are rarely concerned about.

Numerical Simulation on Size Effect of Fracture Toughness

The numerical model of concrete mesofracture was established to simulate the fracture process of wedge splitting (WS) concrete specimens with widths of 2002000 mm and three-point bending (3-p-b) concrete specimens with heights of 200800 mm.The fracture process of concrete was simulated,and the peak load ( Pmax) of concrete was predicted using the numerical model.Numerical Simulation of the Fractures of Anisotropic Abstract.The failure criteria of anisotropic materials,the criteria being expressed via deformations,are rarely applied in practice,and are usually used for low-ductility materials.Another situation involves the simulation of failures in materials with the high anisotropy of mechanical properties and that suffer elastic-brittle fracture.Numerical Simulation of Spin Testing for Turbo Machine The results of calculation made using this criterion were compared with the results of disk testing carried out at special spin test rigs and also with the results of calculations made using different local strain and stress fracture criteria.Numerical simulation is effectively usable to assess the load-carrying capability of disks taking into account possible adverse combination of mechanical material properties and other

Numerical Simulation of Spin Testing for Turbo Machine

The results of calculation made using this criterion were compared with the results of disk testing carried out at special spin test rigs and also with the results of calculations made using different local strain and stress fracture criteria.Numerical simulation is effectively usable to assess the load-carrying capability of disks taking into Numerical Simulation of Ice Fractures Process of the Numerical Simulation of Ice Fractures Process of the Yellow River Based on Disk Specimen .by theoretical analysis summarizes the basic theory and method of river ice mechanics and provides the physical basis and criteria for river ice fracture mechanics. The algorithm applied the inelastic force of an external load instead of a change Numerical Simulation of Delamination Growth inThe use of decohesion elements for the simulation of delamination in composite materials is reviewed.The test methods available to measure the interfacial fracture toughness used in the formulation of decohesion elements are described initially.After a brief presentation of the virtual crack closure technique,the technique most widely used to

Numerical Simulation of Cohesive Fracture by the

applied to study three examples,namely the crack nucle- presumed or separate fracture criteria are needed in the Numerical simulation of cohesive fracture by the VIB model.265Numerical Simulation for Rock Fracture Viscoelastic Creep In many rock engineering projects such as hydrocarbon extraction and geothermal energy utilization,the hydraulic and mechanical behavior of rock fractures significantly affects the safety and profitability of the project.In field conditions,the hydraulic and mechanical behavior of rock fractures changes with time (the rock fractures creep),and this creep is not negligible even under dry Numerical Simulation for Rock Fracture Viscoelastic Creep In many rock engineering projects such as hydrocarbon extraction and geothermal energy utilization,the hydraulic and mechanical behavior of rock fractures significantly affects the safety and profitability of the project.In field conditions,the hydraulic and mechanical behavior of rock fractures changes with time (the rock fractures creep),and this creep is not negligible even under dry

Numerical Investigation on Fracture Initiation Properties

Mar 31,2020 Fracture criteria applied to numerical simulation of#0183;In this paper,the numerical simulation has investigated the fracture initiation behavior at interfaces in dissimilar steel welded joints.The main conclusions are drawn as follows (1) For the interface crack between ductile materials,the ductile fracture originates from a softer material owing to the strain concentration.Multibody model of the human upper extremity for fracture Jul 02,2016 Fracture criteria applied to numerical simulation of#0183;There are two fracture points in the model.The first fracture point is located at half the length of the arm and is used to simulate a fracture of the humerus bone.The second fracture point is located at half the length of the forearm and simulates a fracture of the radius and ulna bones.Figure 2.Multibody model of the human upper extremity for fracture Jul 02,2016 Fracture criteria applied to numerical simulation of#0183;Simulation of a fracture works as follows.If no force/bending moment is applied to the considered extremity segment (arm or forearm) or the force/bending moment is lower than the restraint limit value,then the segment remains in a neutral position (Figure 2 (a)).But when the force/bending moment applied to the segment is higher than the restraint limit value,then the connection breaks

Fracture criteria applied to numerical simulation of

Aug 01,2020 Fracture criteria applied to numerical simulation of#0183;As various fracture criteria exist,the selection and application of a suitable fracture criterion are of great interest to achieve a successful ram shearing simulation.In this paper,the CrashFEM criterion,previously employed in crashworthiness simulation,is first adopted in BOP ram shearing simulation to capture the onset of damage to the pipe.Fracture Mechanics Numerical Modeling Potential and 2 NUMERICAL METHODS FOR FRACTURE SIMULATION Several numerical approaches have been applied to rock mechanics challenges in general.For a review of the different methods and a comprehensive reference base refer to Jing and Hudson (2002) and in particular Jing (2003).For explicit fracture propagation analysis of geomaterialsExperimental and numerical fracture analysis of the plain Aug 01,2020 Fracture criteria applied to numerical simulation of#0183;Combined with the failure criteria for PMB materials,the BB-PD model is used to simulate their fracture behavior numerically.The modelling approach in the discrete level of the UHPC-PVA structures is presented.The determination of the discretization and mechanical parameters used in the numerical simulation is explained in detail.

Determination of fracture energy and tensile cohesive

The G IC value is used for the characterization of interlaminar fracture toughness of composites.The test specimen,the applied load,P,to the two arms,and the load line displacement,,are schematically illustrated in Fig.1.An analytical solution for a DCB specimen was developed by Kanninen [7],[8].Cited by 1Publish Year 2020Author Song Yaobin,Lu Weiyong,He Changchun,Bai Erhu3D numerical simulation of pulsed fracture in complex Sep 01,2020 Fracture criteria applied to numerical simulation of#0183;Simulation of pulsed fracture in fracture-cavitied reservoir (a) simulation object; and simulated results at the time (b) t = 4.6 ms; (c) t = 4.7 ms; (d) t = 4.8 ms.Seen from Fig.23 b,at t = 4.6 ms,the pulsed fracture initiates and extends along the direction of horizontal maximum in-situ stress,and then connects with the natural fracture.Author Yujie Wang,Xinyong Li,Bing Zhao,Zhennan ZhangPublish Year 2020Numerical Simulation of the Fractures of Anisotropic failure criteria are formulated using ultimate strains and strain tensor invariants.For simulating the fractures of materials that are characterized by the anisotropy of strength properties,the failure criteria are applied with the critical values of stresses and strains,as well as their intensities.

Author Lei Zhu,Segen F.Estefen,Marcelo Igor Louren Fracture criteria applied to numerical simulation of#231;oPublish Year 2020Numerical Simulation of the Influence of Natural Fractures

The morphology of the hydraulic fracture determined using the numerical simulation is in agreement with the existing physical experiment results.(2) In the case of a large approach angle,the hydraulic fracture directly passes through the natural fracture,and the initiation pressure of the natural fracture gradually increases.When the approach angle is 90 Fracture criteria applied to numerical simulation of#176;,the initiation pressure of the natural fractureAuthor Juan Wang,Qianqian Wu,Junfeng Guan,Peng Zhang,Hongyuan Fang,Shaowei HuPublish Year 2020Fracture performance and numerical simulation of basalt Nov 20,2019 Fracture criteria applied to numerical simulation of#0183;Kaplan first applied the theory of fracture mechanics to concrete in 1961 and conducted abundant experiments on fracture toughness .With the development of concrete fracture mechanics,numerical simulation of concrete fracture has been extensively exploited.Hillerborg et al. 3-D Hashin failure criteria.Assessment of ductile fracture criteria with respect to Apr 01,2020 Fracture criteria applied to numerical simulation of#0183;Five fracture criteria are selected for further assessment,namely the criteria developed by Freudenthal,Brozzo et al.,Oyane,Argon et al.,Zhan et al.This time,the experimental and numerical crack lengths are compared.First of all,the length of cracks in rolled parts is determined.This is done using the radiograms shown in Fig.21.It is found that the cracks formed in the rolled

Application of Ductile Fracture Criteria to Industrial

Experimental and numerical studies of fracture prediction with Czech steel no.41 2050 are presented.Seven ductile fracture criteria were calibrated,applied to simulation of rod cutting and bolt head trimming operation and compared with experimental results of these processes,obtained in semi-industrial conditions in cooperation with our industrial partner.Analysis of Fracture Coalescence By Fracture Mechanics The mechanical and hydraulical behaviour of rock mass is governed by the presence of discontinuities.The simulation of fracture growth and interaction may help understanding the general mechanical and hydraulic rock mass behavior to changes in boundary conditions in rock engineering applications.In this investigation the numerical simulation of crack propagation and interaction of fractures in uniaxial andAnalysis of Fracture Coalescence By Fracture Mechanics In this investigation the numerical simulation of crack propagation and interaction of fractures in uniaxial and biaxial stress fields using a fracture mechanics based software is presented.For the analyses,the geomecon fracture mechanics research code roxol was used.roxol is a 2D hydro-fracture-mechanical finite element code designed for

A Variational Approach to the Modeling and Numerical

ply propagation criteria to an individual fracture along prescribed path(s).In practice,however,the modeling of hydraulic fracturing in reservoir stimula-tion requires handling interactions between multiple natural or induced fractures growing along unknown paths,and changes in fracture12345NextNumerical Simulation of the Influence of Natural Fractures According to the theory of plane mechanics involving the interaction of hydraulic and natural fractures,the law of hydraulic fracture propagation under the influence of natural fractures is verified using theoretical analysis and RFPA 2D -Flow numerical simulation approaches.The shear and tensile failure mechanisms of rock are simultaneously considered.

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