A robust finite element approach for large deformation elastoplastic plane-strain problems

Vavourakis, Vasileios; Loukidis, Dimitrios; Charmpis, Dimos C.; Papanastasiou, Panos

doi:10.1016/j.finel.2013.08.003

Cited by 20 publications

(3 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the arbitrary Lagrangian-Eulerian (ALE) method was developed, which combines the advantages of the Lagrange and Euler methods to alleviate the disadvantages of mesh deformation in the Lagrange method [18,19]. However, the computational efficiency of ALE depends on the division of the initial mesh, and the geometric calculation related to the mesh is cumbersome and complicated to implement [20,21].…”

Section: Numerical Analysis Methods For Large Deformation In Geomecha...mentioning

confidence: 99%

Slope Stability Analysis Based on the Explicit Smoothed Particle Finite Element Method

Jia,

Jiang,

Huang

et al. 2024

Sustainability

View full text Add to dashboard Cite

A landslide is a common natural disaster that causes environmental damage, casualties and economic losses, which seriously affects the sustainable development of society. In geomechanics, it is one of the largest deformation problems. Herein, the GPU-accelerated explicit smoothed particle finite element method (eSPFEM) for large deformation analysis in geomechanics was developed on the CUDA platform based on high-performance computing using a self-designed eSPFEM program code. The eSPFEM combines the strain smoothing nodal integration techniques found in the particle finite element method (PFEM) framework, which allows for the use of low-order triangular elements without volume locking and avoids frequent information transfer and mapping errors between Gaussian points and particles in PFEM. A numerical simulation of slope instability using the eSPFEM and based on a strength reduction technique was conducted using various examples, including a cohesive homogeneous slope, a non-cohesive homogeneous slope, a non-homogeneous slope and a slope with a thin soft band. The calculation results show that the eSPFEM can be applied to slope stability analysis under different working conditions, simulating the entire process of slope instability initiation, sliding and reaccumulation, and obtaining reliable FOS values. A numerical simulation was conducted to analyse a landslide that occurred in the Zhangjiazhuang tunnel on the Lanzhou–Xinjiang high-speed railway line on 18 January 2016. A natural unsaturated soil slope, a soil slope with a high moisture content and a soil slope with a high moisture content subjected to an earthquake were analysed. The findings of this study are in good agreement with the actual slope failure conditions. The primary triggers identified for the landslide were heavy rainfall and earthquakes. The verification results indicate that the eSPFEM can effectively simulate an actual landslide case, showcasing high accuracy and applicability in simulating the large deformation behaviour of landslides.

show abstract

Section: Numerical Analysis Methods For Large Deformation In Geomecha...mentioning

confidence: 99%

Slope Stability Analysis Based on the Explicit Smoothed Particle Finite Element Method

Jia,

Jiang,

Huang

et al. 2024

Sustainability

View full text Add to dashboard Cite

show abstract

“…This formulation was proven to be successful in modelling the fluid-like behaviours of materials during bulk metal forming [31][32][33][34][35]. Vavourakis et al [36] used a decoupled ALE approach for the extensive deformation modelling of plane-strain elastoplastic problems and the obtained results were validated with limit analysis solutions. The numerical simulations of non-Newtonian fluid flow in a three-dimensional moulding process were performed with the ALE method and the capabilities of this method were demonstrated by Wang and Li [37].…”

Section: Introductionmentioning

confidence: 99%

A Useful Manufacturing Guide for Rotary Piercing Seamless Pipe by ALE Method

Topa

Cerik

Kim

2020

JMSE

View full text Add to dashboard Cite

The development of numerical simulations is potentially useful in predicting the most suitable manufacturing processes and ultimately improving product quality. Seamless pipes are manufactured by a rotary piercing process in which round billets (workpiece) are fed between two rolls and pierced by a stationary plug. During this process, the material undergoes severe deformation which renders it impractical to be modelled and analysed with conventional finite element methods. In this paper, three-dimensional numerical simulations of the piercing process are performed with an arbitrary Lagrangian–Eulerian (ALE) formulation in LS-DYNA software. Details about the material model as well as the elements’ formulations are elaborated here, and mesh sensitivity analysis was performed. The results of the numerical simulations are in good agreement with experimental data found in the literature and the validity of the analysis method is confirmed. The effects of varying workpiece velocity, process temperature, and wall thickness on the maximum stress levels of the product material/pipes are investigated by performing simulations of sixty scenarios. Three-dimensional surface plots are generated which can be utilized to predict the maximum stress value at any given combination of the three parameters.

show abstract

“…This formulation was proven to be successful in modelling the fluid-like behaviours of materials during bulk metal forming [31][32][33][34][35]. Vavourakis et al [36] used a decoupled ALE approach for the large deformation modelling of plane-strain elastoplastic problems and the obtained results were validated with limit analysis solutions. The numerical simulations non-Newtonian fluid flow in three dimensional moulding process were performed with ALE method and the capabilities of this method were demonstrated by Wang and Li [37].…”

Section: Introductionmentioning

confidence: 99%

A Useful Manufacturing Guide for Rotary Piercing Seamless Pipe by ALE Method

Topa¹,

Cerik²,

Kim³

2020

Preprint

View full text Add to dashboard Cite

The development of numerical simulations is potentially useful in predicting the most suitable manufacturing process and ultimately improving product quality. Seamless pipes are manufactured by rotary piercing process in which round bars are fed between two rolls and pierced by a stationary plug. During this process, the material undergoes severe deformation which renders it impractical to be modelled and analysed with conventional finite element methods. In this paper, three dimensional numerical simulations of the piercing process are performed with Arbitrary Lagrangian-Eulerian (ALE) Formulation in LS DYNA software. Details about the material model as well as the elements formulations are elaborated here and mesh sensitivity analysis was performed. The results of the numerical simulations are in good agreement with experimental data found in the literature and the validity of the analysis method is confirmed. The effects of varying workpiece velocity, process temperature, and wall thickness on the maximum stress levels of the product material/pipes are investigated by performing simulations of sixty scenarios. Three dimensional surface plots are generated which can be utilized to predict the maximum stress value at any given combination of the three parameters.

show abstract

A robust finite element approach for large deformation elastoplastic plane-strain problems

Cited by 20 publications

References 41 publications

Slope Stability Analysis Based on the Explicit Smoothed Particle Finite Element Method

Slope Stability Analysis Based on the Explicit Smoothed Particle Finite Element Method

A Useful Manufacturing Guide for Rotary Piercing Seamless Pipe by ALE Method

A Useful Manufacturing Guide for Rotary Piercing Seamless Pipe by ALE Method

Contact Info

Product

Resources

About