Investigations on the influence of the triaxial state of stress on the failure of polyurethane rigid foams

Şerban, Dan Andrei; Negru, Radu; Filipescu, Hannelore; Marșavina, Liviu

doi:10.1007/s00161-020-00924-x

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…• , Figure 9a,b, respectively), both models overestimate the stress response after a certain equivalent plastic strain. This aspect may be caused by damage onset in the material, which can progressively reduce the stiffness of the material [20]. Figure 10 shows an image capture from the tests performed at 15…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

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A Study of Yielding and Plasticity of Rapid Prototyped ABS

et al. 2021

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In this article, the yielding and plastic flow of a rapid-prototyped ABS compound was investigated for various plane stress states. The experimental procedures consisted of multiaxial tests performed on an Arcan device on specimens manufactured through photopolymerization. Numerical analyses were employed in order to determine the yield points for each stress state configuration. The results were used for the calibration of the Hosford yield criterion and flow potential. Numerical analyses performed on identical specimen models and test configurations yielded results that are in accordance with the experimental data.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The failure mechanism associated with ductile materials considers that the critical plastic strain at damage onset is a function of the stress triaxiality η, the Lode angle parameter Θ and the equivalent plastic strain rate . pl [20].…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

A Study of Yielding and Plasticity of Rapid Prototyped ABS

et al. 2021

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“…The Lode angle θ is the included angle between the σ 1 = σ 2 plane and the plane that passes through the hydrostatic axis. Wu et al [29] and Serban [38] investigated the influence of the triaxial state of stress on the failure and yield of foam. The range of θ is 0 • ≤ θ ≤ 60 • .…”

Section: Multiaxial Loading Conditionsmentioning

confidence: 99%

Study on the Yield Behavior of Closed-Cell Foams under Multiaxial Loads Based on Different Yield Definitions

Fang

Qian

2023

Applied Sciences

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In this paper, the yield behavior of closed-cell foams under multiaxial load conditions is investigated via finite element analysis on the representative volume element (RVE) scale by using the regular Kelvin of RVE and random models of RVE, respectively. Several different definitions of yield are considered in the study. By benchmarking the simulations with the experimental data in the literature, it is shown that the elastic energy criterion is shown to be suitable for the definition of the yield point of closed-cell foams under different stress states. Based on the micro-scale elastic energy, which can be readily obtained by numerical simulation, a general yield definition is proposed to determine the yield behavior of the closed-cell foam materials at macroscopic scales. To test the adaptability of this general yield definition, we analyze multiple random models with different relative densities and inner structures. The results indicate that this general yield definition method can be used for different models, even applied to continuum materials.

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“…The successful failure prediction of metals using the ductile failure models implemented in finite element analysis software is well documented in literature [10][11][12] and, in recent years, it has been applied to polymeric materials with good results [13,14], considering the limited model calibration data.…”

Section: Introductionmentioning

confidence: 99%

“…Once the damage initiation criterion is achieved, the progressive damage and failure of the material can be modelled using a damage evolution function, that gradually diminishes the effective stress tensor components by considering various parameters (usually, equivalent plastic strain or strain energy) [14,15].…”

Section: Introductionmentioning

confidence: 99%

Failure Locus of an ABS-Based Compound Manufactured through Photopolymerization

et al. 2022

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This work investigates the critical plastic strain variation with stress triaxiality and the Lode angle parameter for an Acrylonitrile butadiene styrene (ABS)-based proprietary blend compound (commercial name VeroWhitePlus™ RGD835) manufactured through photopolymerization. Various triaxial states of stress and Lode angles were obtained with the help of notched flat specimens used in tensile loadings, notched round specimens used in compression (upsetting) tests and butterfly specimens used in Arcan tests. The tests were replicated using finite element analyses in order to evaluate the aforementioned parameters.

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Investigations on the influence of the triaxial state of stress on the failure of polyurethane rigid foams

Cited by 6 publications

References 18 publications

A Study of Yielding and Plasticity of Rapid Prototyped ABS

A Study of Yielding and Plasticity of Rapid Prototyped ABS

Study on the Yield Behavior of Closed-Cell Foams under Multiaxial Loads Based on Different Yield Definitions

Failure Locus of an ABS-Based Compound Manufactured through Photopolymerization

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