Advances in nonlinear finite element analysis of automobiles

Bathe, Klaus‐Jürgen; Guillermin, Olivier; Walczak, Jan; Chen, Heng-Yee

doi:10.1016/s0045-7949(97)00035-7

Cited by 18 publications

(6 citation statements)

References 4 publications

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“…In one series, the material density is real while the virtual loading speed is 8, 40, 80, 400, 800, 4000, 8000, 40000 and 80000 mm/s. In the other one, the ratio of the virtual material density to the real one, namely the material density magnification, is 1, 10, 100, 1×10 3 , 1×10 4 , 1×10 5 , 1×10 6 , 1×10 7 and 1×10 8 the upper part of composite tubes, leading to delimitations between the two layers. Then the inner layer of the wall is compressed inward, while the most of the outer layer is outward.…”

Section: Resultsmentioning

confidence: 99%

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A Simulation Strategy on the Quasi-Static Axial Crushing Process of Composite Tubes Based on LS-DYNA

Yuan

Hui

et al. 2014

AMR

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Based on the code LS-DYNA, the simulation strategy on the quasi-static crushing process of composite tubes is studied by conducting two series of comparison simulations: one is at different virtual loading speeds with the real material density and the other is with different virtual material densities at the given loading speed. The simulation results are summarized as three types, namely mode-varying type (MVT), unstable type (UT) and stable type (ST), depending on the change of the structural failure mode and the occurrence of the load-fluctuating stage in the load-displacement curve. Analysis has shown that the steady load possesses the stability, the peak load has the convergence zone, and the thresholds of energy ratio can be adopted to evaluate the simulation results. In the end, the simulation strategy is proposed to makes it possible to acquire the simulation results with a higher query precision at a lower computing cost.

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Section: Resultsmentioning

confidence: 99%

“…With the code LS-DYNA, several literatures [6][7][8][9][10] have carried out comprehensive researches on the simulation of quasi-static crushing progress of thin-walled metal structures. The literature [6] puts forward the loading-speed-increasing method to reduce the computing time.…”

Section: Introductionmentioning

confidence: 99%

A Simulation Strategy on the Quasi-Static Axial Crushing Process of Composite Tubes Based on LS-DYNA

Yuan

Hui

et al. 2014

AMR

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“…(1) and (2), in the explicit time integration solution, a stiness matrix is not formed, iterations for equilibrium at the time steps considered are not carried out, and instead a simple time-marchingforward solution is produced. This analysis approach is attractive because diculties with respect to convergence in equilibrium iterations do not arise.…”

Section: Crush Analysis With Crash Analysis Programsmentioning

confidence: 99%

“…For an example analysis in which these solution dierences have been studied in detail, see Ref. [2].…”

Section: Crush Analysis With Crash Analysis Programsmentioning

confidence: 99%

Advances in crush analysis

Bathe

Walczak²,

Guillermin³

et al. 1999

Computers & Structures

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Advances in capabilities for the crush analysis of structures are presented. Such analyses are dicult to perform and require state-of-the-art analysis procedures: ecient and reliable shell elements, an eective and general contact algorithm, ecient procedures to calculate the element stresses in elasto-plasticity, the use of consistent tangent matrices, eective nonlinear incremental solution strategies and the ecient solution of the algebraic ®nite element equations. Moreover, the eectiveness of the complete analysis process can only be achieved by ensuring that each of the above solution procedures is in an eective manner integrated into a complete solution scheme. This paper focuses on the advances developed in ADINA and presents various analysis cases solved with the program. #

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“…Hence, for overall stability of the solution, the time step has to be sufficiently small and the inertia forces need to be sufficiently large. For an analysis demonstrating these requirements (see [4]). …”

Section: Introductionmentioning

confidence: 99%

Implicit integration for the solution of metal forming processes

Kawka¹,

Bathe²

2001

Computational Fluid and Solid Mechanics

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The simulation of metal forming processes is performed using implicit integration analysis procedures. The approach is based on reliable and efficient solution procedures, uses the actual physical simulation parameters (that is, no adjustment of the tool velocity or work piece density is employed) and enables to achieve accurate results of the loading and spring-back processes in a single solution run. In the analyses performed, the solution times were not far from (and frequently less than) those required in explicit time integration analyses.

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Advances in nonlinear finite element analysis of automobiles

Cited by 18 publications

References 4 publications

A Simulation Strategy on the Quasi-Static Axial Crushing Process of Composite Tubes Based on LS-DYNA

A Simulation Strategy on the Quasi-Static Axial Crushing Process of Composite Tubes Based on LS-DYNA

Advances in crush analysis

Implicit integration for the solution of metal forming processes

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