Computational studies on fragmentation of brittle materials

Ghosh, A.; Kumar, V.

doi:10.1177/0954406212466766

Cited by 3 publications

(3 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the CPM originally used enrichments to describe crack surfaces, which is similar to some enrichment‐type methods for meshless fracture , it has been shown that extra unknowns caused by enrichment can be removed by splitting cracking particles as in . A number of papers have appeared recently applying CPM to dynamic fracture , the use of obscuration zones and ductile fracture , and in , some issues associated with integration have been addressed using stabilised nodal methods. There are also a few manuscripts using cracking particle‐type methods for other fracture problems, such as the use of cohesive zone elements and cohesive links .…”

Section: A New Cracking Particle Methodsmentioning

confidence: 99%

An adaptive cracking particle method for 2D crack propagation

Augarde

2016

Numerical Meth Engineering

View full text Add to dashboard Cite

has been published in nal form at http://dx.doi.org/10.1002/nme.5269. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. SUMMARY (TO BE REVISED ONCE TEXT IS COMPLETE) An adaptive Cracking ParticleMethod is developed to model the crack propagation process. A set of cracking particles are used to describe the crack patterns and can be easily updated when the crack propagates. The change of cracking angle is recorded in discrete segments of broken lines which makes this methodology suitable to model discontinuous cracks. The node arrangements can be set up automatically by the adaptivity approach throughout the whole propagation steps to keep the accuracy and efficiency of the analysis. The system stiffness is calculated and stored in local matrices, so only a small influenced domain should be recalculated for each step while the remainder can be read directly form the storage, which greatly reduces the computational expense. The methodology is applied to several 2D crack problems and good agreements are achieved

show abstract

Section: A New Cracking Particle Methodsmentioning

confidence: 99%

An adaptive cracking particle method for 2D crack propagation

Augarde

2016

Numerical Meth Engineering

View full text Add to dashboard Cite

show abstract

“…It uses a meshless particle method for fluids and structures and is suitable for dealing with complex FSI problems including crack extension and penetration [19,20]. Meanwhile, many researchers have used the crack particles method (CPM) to simulate dynamic fracture of metals [21]. CPM does not require an explicit representation of the crack topology, which makes it suitable for dynamic fracture and fragmentation problems [22].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Crack Propagation and Failure of Liquid-Filled Cylindrical Shells Damaged in High-Pressure Environments

Zhang,

Tan,

et al. 2024

JMSE

View full text Add to dashboard Cite

Cylindrical shell structures have excellent structural properties and load-bearing capacities in fields such as aerospace, marine engineering, and nuclear power. However, under high-pressure conditions, cylindrical shells are prone to cracking due to impact, corrosion, and fatigue, leading to a reduction in structural strength or failure. This paper proposes a static modeling method for damaged liquid-filled cylindrical shells based on the extended finite element method (XFEM). It investigated the impact of different initial crack angles on the crack propagation path and failure process of liquid-filled cylindrical shells, overcoming the difficulties of accurately simulating stress concentration at crack tips and discontinuities in the propagation path encountered in traditional finite element methods. Additionally, based on fluid‒structure interaction theory, a dynamic model for damaged liquid-filled cylindrical shells was established, analyzing the changes in pressure and flow state of the fluid during crack propagation. Experimental results showed that although the initial crack angle had a slight effect on the crack propagation path, the crack ultimately extended along both sides of the main axis of the cylindrical shell. When the initial crack angle was 0°, the crack propagation path was more likely to form a through-crack, with the highest penetration rate, whereas when the initial crack angle was 75°, the crack propagation speed was slower. After fluid entered the cylindrical shell, it spurted along the crack propagation path, forming a wave crest at the initial ejection position.

show abstract

“…Specifically, Cheng et al [ 20 ] carried out computational simulation to demonstrate the dislocation movement in silicon crystal. Although lots of numerical simulation methods have been conducted to assert the plastic deformation of silicon substrate, it is difficult to uncover the essences of dislocation evolution and crack initiation due to the restriction of simulation scale [ 21 , 22 ]. Moreover, most of the existing studies focused on local defect nucleation behavior under monotonous loading.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Analyses of Surface Failure Mechanism of Single-Crystal Silicon during Micro-Milling Process

Bai

Tong

2017

Materials

View full text Add to dashboard Cite

This article presents an experimental investigation on ductile-mode micro-milling of monocrystalline silicon using polycrystalline diamond (PCD) end mills. Experimental results indicate that the irregular fluctuation of cutting force always induces machined surface failure, even in ductile mode. The internal mechanism has not been investigated so far. The multiscale discrete dislocation plasticity framework was used to predict the dislocation structure and strain evolution under the discontinuous cutting process. The results showed that a mass of dislocations can be generated and affected in silicon crystal. The dislocation density, multiplication rate, and microstructure strongly depend on the milling conditions. In particular, transient impulse load can provide a great potential for material strength by forming dislocations entanglement structure. The continuous irregular cutting process can induce persistent slip bands (PSBs) in substrate surface, which would result in stress concentration and inhomogeneous deformation within grains.

show abstract

Computational studies on fragmentation of brittle materials

Cited by 3 publications

References 54 publications

An adaptive cracking particle method for 2D crack propagation

An adaptive cracking particle method for 2D crack propagation

Investigation of Crack Propagation and Failure of Liquid-Filled Cylindrical Shells Damaged in High-Pressure Environments

Multiscale Analyses of Surface Failure Mechanism of Single-Crystal Silicon during Micro-Milling Process

Contact Info

Product

Resources

About