A computational determination of the Cowper–Symonds parameters from a single Taylor test

Hernández, Camilo; Maranon, A.; Ashcroft, Ian; Casas-Rodríguez, Juan Pablo

doi:10.1016/j.apm.2012.10.010

Cited by 78 publications

(41 citation statements)

References 29 publications

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“…Since the Cowper-Symonds material model is simpler than the other two, considers the material failure and has been often applied in bone material models, we considered only this model in our research. [20][21][22] In the FE model, the Cowper-Symonds law is implemented through the *MAT_PLASTIC_KINEMATIC (*MAT type 3) in LS-DYNA material library. Yield stress according to the Cowper-Symonds material model is defined with equation (1) 23,24…”

Section: Materials Propertiesmentioning

confidence: 99%

Thermo-mechanical stresses distribution on bone drilling: Numerical and experimental procedures

Fernandes

Fonseca

Jorge

2017

Proceedings of the Institution of Mechanical Engineers, Part L:

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In bone drilling, the temperature and the level of stresses at the bone tissue are function of the drilling parameters. If certain thresholds are exceeded, irreversible damages may occur on the bone tissue. One of the main challenges in the drilling process is to control the associated parameters and even more important, to avoid the surrounding tissue damage. In this study, a dynamic numerical model is developed to determine the thermo-mechanical stresses generated during the bone drilling, using the finite element method. The numerical model incorporates the geometric and dynamic characteristics involved in the drilling processes, as well the developed temperature inside the material. The numerical analysis has been validated by experimental tests using polyurethane foam materials with similar mechanical properties to the human bone. Results suggest that a drill bit with lower drill speed and higher feed rate can reduce the strains and stresses in bone during the drilling process. The proposed numerical model reflected adequately the experimental results and could be useful in determination of optimal drilling conditions that minimise the bone injuries.

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Section: Materials Propertiesmentioning

confidence: 99%

Thermo-mechanical stresses distribution on bone drilling: Numerical and experimental procedures

Fernandes

Fonseca

Jorge

2017

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Recently it has been shown that mechanical testing methods can be combined with finite element (FE) based solid mechanical models to create an inverse FE method (IFEM) for characterizing complex material properties. [17][18][19][20][21][22] This method is particularly useful when combined with nanoindentation as the test enables the spatial distribution of properties to be investigated whilst the IFEM enables access to material models not available in the standard forward analysis of nanoindentation data. [23][24][25][26][27][28] This technique has been described previously by the authors in the analysis of 3D ink jet based printed objects to identify spatial variation in properties.…”

Section: Introductionmentioning

confidence: 99%

An investigation into the depth and time dependent behavior of UV cured 3D ink jet printed objects

et al. 2017

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An ultra-violet (UV) curable ink jet 3D printed material was characterized by an inverse finite element modeling (IFEM) technique employing a nonlinear viscoelastic-viscoplastic (NVEVP) material constitutive model; this methodology was compared directly with nanoindentation tests. The printed UV cured ink jet material properties were found to be z-depth dependent owing to the sequential layer-by-layer deposition approach. With further post-UV curing, the z-depth dependence was weakened but properties at all depths were influenced by the duration of UV exposure, indicating that none of the materials within the samples had reached full cure during the 3D printing process. Effects due to the proximity of an indentation to the 3D printed material material-sample fixing interface, and the different mounting material, in a test sample were examined by direct 3D finite element simulation and shown to be insignificant for experiments performed at a distance greater than 20 lm from the interface.

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“…It is a very cost-effective material model which is available for solid and shell elements. In addition, the strain rate effect is taken into account by Cowper-Symonds model [32][33][34].…”

Section: Fe Model Of Aluminium Alloy Plate Impactmentioning

confidence: 99%

Safety Assessment of Aircraft Fuel Tank Access Cover under the Impact Load by Tire Fragments

Yao

Yue

Geng

et al. 2019

Chin. J. Mech. Eng.

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According to relevant airworthiness standards, the aircraft fuel tank access cover must withstand the impact by tire fragments, and minimize the penetration and deformation, which is critical for flight safety. To assess the safety of an aircraft fuel tank access cover subjected to tire fragments, a study of dynamic response was presented in this paper using the Finite element (FE) software ANSYS/LS-DYNA. To obtain the reliable mechanical characteristics of tire tread rubber, a series of material tests have been conducted. Then the proposed rubber material model is validated by comparing the numerical simulations with the experimental results of aluminium alloy plate impact. The simulation results indicate that the rubber fragment and alloy plate will undergo the largest deformation when impact angle is equal to 90°. Finally, the proposed FE model and modelling approaches are extended to the numerical simulation of a full-scale aircraft fuel tank access cover impact. The numerical simulations are carried out with impact velocity of 71.1 m/s and impact angle of 40.5°. The simulation results indicate that the aluminium alloy by precision casting is more likely to rupture, and the middle region of the access cover is vulnerable to fragment impact. This research proposes a reliable rubber model applying to various strain rates. Considering the influence of impact regions, the dynamic response and various failure patterns of fuel tank access cover are acquired. The findings of this paper can be used to improve the future aircraft safety design. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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A computational determination of the Cowper–Symonds parameters from a single Taylor test

Cited by 78 publications

References 29 publications

Thermo-mechanical stresses distribution on bone drilling: Numerical and experimental procedures

Thermo-mechanical stresses distribution on bone drilling: Numerical and experimental procedures

An investigation into the depth and time dependent behavior of UV cured 3D ink jet printed objects

Safety Assessment of Aircraft Fuel Tank Access Cover under the Impact Load by Tire Fragments

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