Numerical identification of material model for C–Mn steel using micro-indentation test

Kopernik, Magdalena; Spychalski, Maciej; Kurzydłowski, K. J.; Pietrzyk, M.

doi:10.1179/174328408x278510

Cited by 16 publications

(12 citation statements)

References 12 publications

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“…A conical indenter with a half apex angle of 70.3 leads to the same area-todepth function as that of a Berkovich indenter. Numerous works have shown that this approach sufficiently captures the response of a full-3D model [18][19][20][21][22][23].…”

Section: Oliver and Pharr Methodsmentioning

confidence: 97%

Finite element method-assisted acquisition of the matrix influence on the indentation results of an embedded hard phase

Pöhl

Huth

Theisen

2013

Materials Science and Engineering: A

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Section: Oliver and Pharr Methodsmentioning

confidence: 97%

Finite element method-assisted acquisition of the matrix influence on the indentation results of an embedded hard phase

Pöhl

Huth

Theisen

2013

Materials Science and Engineering: A

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“…Presented identification task data is a stress-strain curve of a micro alloyed steel 38MnSV4 in 800°C and with a strain rate equal 1 s -1 . First task: first constitutive model is a simple Hollomon's equation [15,16]: (2) where: is a calculated stress, ε i is a corresponding strain and optimized parameters are k -a material constant and n - a strain hardening index.…”

Section: ■ Mechanical Tests and Constitutive Materials Modelsmentioning

confidence: 99%

Evaluation of possibilities of application of web-based tool for effective identification of mechanical properties of materials

Wolski

Kopernik

2018

Mechanik

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The main purpose of the work is to present and test the developed web-based tool to identify parameters of rheological equations, whose functionality according to the presented results is comparable to existing desktop applications. The developed web-based application with a user-friendly interface uses selected optimization methods (Powell and Hooke-Jeeves algorithms). Criteria for selecting optimization methods are: robustness and frequent application to identification problems described in literature. Testing the developed application consists of comparing the identified stress-strain curves obtained from mechanical tests using the developed tool and commercial desktop application, and performing efficiency tests for the analyzed examples of rheological equations and optimization methods. For this purpose, two material models were used: a simple Hollomon’s model and a multi-parameter model used for steel, in which the influence of softening during the dynamic recrystallization is insignificant. The presented software is implemented in technologies such as JDK 1.8, Spring Framework and PrimeFaces, and passes the efficiency tests successfully.

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“…The analogous micro‐model enriched with boundary conditions taken from experimental nanoindentation test and micro‐tension test is shown in the present work. Thus, the developed FE model of wall of VAD on a micro‐scale is used to: Identify mechanical properties of the TiN coating deposited on polymer by using results of nanoindentation test Perform sensitivity analysis of the developed micro‐model of mechanical test …”

Section: Fe Model On Micro‐scalementioning

confidence: 99%

“…Optimization of the model of prototypes of VAD The objectives of FE model on a micro‐scale are: Identification of mechanical properties of the TiN nano‐coating Analysis of a strain and a stress states in a multi‐layer wall of the prototypes of VADs …”

Section: Introductionmentioning

confidence: 99%

Development and Application of Multi‐Scale Numerical Tool to Modeling Pneumatic Ventricular Assist Devices with Increased Athrombogenicity

Kopernik

2014

Adv Eng Mater

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The multi-scale numerical model of blood chamber of ventricular assist device (VAD) with deposited a biocompatible titanium nitride (TiN) nano-coating is introduced. The model is developed to optimize shape parameters of the blood chamber and to determine fracture parameters of the nano-coating. The development of finite element (FE) macro-model is combined with a digital image correlation data to validate a computed strain state. Contrary, on a micro-scale calibration and validation of a representative volume element (RVE) model of the wall of VAD composed of the TiN coating and substrate-polymer is realized by comparison with results of an experimental in situ SEM's micro-tensile test. The multi-scale model of VAD is enriched with materials research. Thus, tensile tests of VADs' polymers are performed to obtain the properties of designed materials of the VADs. On the other hand, on a micro-scale, the properties of TiN are identified based on a nanoindentation test and an inverse analysis for its interpretation. The profilometric studies and analytical model are presented to calculate a residual stress in the TiN. The final result of the paper is the multi-scale numerical tool to modeling pneumatic VADs with increased biocompatibility produced in Poland. REVIEW Fig. 2. The general conception of the multiÀscale model of VAD's blood chamber: (a) a residual stress modeling and (b) an active load modeling. Reproduced with permission. [15] Fig. 7. The distribution of displacement in Z direction on an external surface of the blood chamber of the VAD under pressure 37.3 kPa and in temperature 37 C: (a) the DIC's result, mm, (b) the FE model's result in the VADFEM code, mm, (c) standard deviation of the DIC's ZÀdirectional displacement (in mm), and (d) standard deviation of the DIC's XÀdirectional principal strains (shown values × 10 − 3 ). Reproduced with permission. [33] 285 REVIEW Fig. 9. Local distributions of (a) an effective strain and (b) a triaxiality factor in the model 4 of prototype of the Polish VAD. Reproduced with permission. [17] The AFM's image of topography of the TiN nano-coating of thickness 50 nm on the selected line of the area 100 nm Â 100 nm; (b) the AFM's image of topography of the TiN nano-coating of thickness 100 nm on the selected line of the area 1 mm Â 1 mm.

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Numerical identification of material model for C–Mn steel using micro-indentation test

Cited by 16 publications

References 12 publications

Finite element method-assisted acquisition of the matrix influence on the indentation results of an embedded hard phase

Finite element method-assisted acquisition of the matrix influence on the indentation results of an embedded hard phase

Evaluation of possibilities of application of web-based tool for effective identification of mechanical properties of materials

Development and Application of Multi‐Scale Numerical Tool to Modeling Pneumatic Ventricular Assist Devices with Increased Athrombogenicity

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