Partner: Alexis Rusinek

National Engineering School of Metz (ENIM) (FR)

Recent publications
1.Frąś T., Rusinek A., Pęcherski R.B., Bernier R., Jankowiak T., Analysis of friction influence on material deformation under biaxial compression state, TRIBOLOGY INTERNATIONAL, ISSN: 0301-679X, DOI: 10.1016/j.triboint.2014.06.019, Vol.80, pp.14-24, 2014
Abstract:

The biaxial compression test, based on the concept presented in [1] and on the technique of the channel-die test [2] and [3], is discussed as an experimental method allowing evolution of the friction conditions from the dry-film lubrication, by using MoS2 grease, to the dry conditions to be analysed. This article gives an outline of the experimental set-up, its validation and the technique of the test results analysis. The analysis of friction is based on the experimental data coupled with the numerical simulation of the performed tests and on the theoretical approach introduced in [4]. The Oxygen-Free High Conductivity (OFHC) copper in the ‘as-received’ state in contact with the 42CrMo4 steel are chosen as the materials used for the experimental investigation.

Keywords:

Biaxial compression, Friction modelling, OFHC copper

Affiliations:
Frąś T.-other affiliation
Rusinek A.-National Engineering School of Metz (ENIM) (FR)
Pęcherski R.B.-other affiliation
Bernier R.-National Engineering School of Metz (ENIM) (FR)
Jankowiak T.-other affiliation
2.Frąś T., Nishida M., Rusinek A., Pęcherski R., Fukuda N., Description of the Yield State of Bioplastics on Examples of Starch-Based Plastics and PLA/PBAT Blends, ENGINEERING TRANSACTIONS (ROZPRAWY INŻYNIERSKIE), ISSN: 0867-888X, Vol.62, No.4, pp.329-354, 2014
Abstract:

The present work concerns the description of the yield state of biodegradable materials. As examples, biodegradable polymers are chosen – cornpole CRP-M2, starch fatty acid ester, and PLA/PBAT, poly(lactic acid) (PLA) blended with poly(butylene adipate/terephthalate) (PBAT) [1, 2]. These biodegradable, plant-derived bioplastics are a promising alternative to petroleum-based plastics. To describe the onset of plasticity in the bioplastics under discussion, Burzyński ’s hypothesis of material effort has been applied [3, 4]. The applied criteria account for the differential strength effect and for the shear correction resulting from the difference between experimental and theoretical values, obtained as a result of the Huber-Mises approach [5, 6]. In general, these properties of yield state are characteristic for polymers. The description of yield state for bioplastics is an issue that has hardly been investigated, which illustrates the novel nature of this paper in which this topic is discussed

Keywords:

bioplastics, strength differential effect, shear correction, yield surface, Burzyński yield condition

Affiliations:
Frąś T.-IPPT PAN
Nishida M.-Nagoya Institute of Technology (JP)
Rusinek A.-National Engineering School of Metz (ENIM) (FR)
Pęcherski R.-IPPT PAN
Fukuda N.-Aichi Center for Industry and Science Technology (JP)
3.Moćko W., Rodriguez-Martinez J.A., Kowalewski Z.L., Rusinek A., Compressive Viscoplastic Response of 6082-T6 and 7075-T6 Aluminium Alloys Under Wide Range of Strain Rate at Room Temperature: Experiments and Modelling, STRAIN, ISSN: 0039-2103, Vol.48, pp.498-509, 2012
4.Frąś T., Kowalewski Z.L., Pęcherski R.B., Rusinek A., Applications of Burzyński failure criteria - I. Isotropic materials with asymmetry of elastic range, ENGINEERING TRANSACTIONS (ROZPRAWY INŻYNIERSKIE), ISSN: 0867-888X, Vol.58, pp.1-10, 2010
Abstract:

The main idea of energy-based hypothesis of material effort proposed by Burzyński is briefly presented and the resulting failure criteria are discussed. Some examples, based on the own studies, which depict applications of these criteria are discussed and visualisations of limit surfaces in the space of principal stresses are presented.

Keywords:

Burzyński yield condition, yield surface, strength differential effect, energy-based yield criteria

Affiliations:
Frąś T.-IPPT PAN
Kowalewski Z.L.-IPPT PAN
Pęcherski R.B.-IPPT PAN
Rusinek A.-National Engineering School of Metz (ENIM) (FR)
5.Klepaczko J.R., Rusinek A., Rodriguez-Martinez J.A., Pęcherski R.B., Arias A., Modelling of thermo-viscoplastic behavior of DH-36 and Weldox 460-E structural steels at wide ranges of strain rates and temperatures, comparison of constitutive relations for impact problems, MECHANICS OF MATERIALS, ISSN: 0167-6636, Vol.41, No.5, pp.599-621, 2009
Abstract:

In this paper, the thermo-viscoplastic behaviour of DH-36 and Weldox-460-E steels is analyzed at wide ranges of strain rates and temperature. These materials are commonly used for naval applications. Thus, the may be subjected to a wide range of exploitation temperature and at the same time to high strain rates due to accidental impact or explosion. The thermo-viscoplastic behaviour of these materials has been modeled by application of RK (Rusinek-Klepaczko) constitutive relation. The comparison with other models well known in the literature has been studied.

Keywords:

constitutive modelling, thermo-viscoplasticity, DH-36 steel, Weldox-460-E steel, impact processes, FE numerical simulations, perforation process

Affiliations:
Klepaczko J.R.-IPPT PAN
Rusinek A.-National Engineering School of Metz (ENIM) (FR)
Rodriguez-Martinez J.A.-other affiliation
Pęcherski R.B.-IPPT PAN
Arias A.-other affiliation
6.Rusinek A., Rodriguez-Martinez J.A., Klepaczko J.R., Pęcherski R.B., Analysis of thermo-visco-plastic behaviour of six high strength steels, MATERIALS AND DESIGN, ISSN: 0261-3069, DOI: 10.1016/j.matdes.2008.07.034, Vol.30, No.5, pp.1748-1761, 2009
Abstract:

In this paper the thermo-visco-plastic behaviour of six high strength steels is analyzed in a wide range of strain rates and temperature. The steels belong to two well-known versions of steels: three ferritic steels: HSLA-65, DH-36 and Wedox 460-E and three austenitic steels: Nitronic-50, Uranus B66 and Al-6XN.
Micro-mechanism of plastic deformation in the case of ferritic steels is dominated by dislocation's gliding. In the case of austenitic steels the twinning appears that modifies the material's plastic properties. In the present paper the RK (Rusinek-Klepaczko) constitutive relation is evaluated for modelling of the plastic behaviour of six steels which represent these two different deformation mechanisms.

Keywords:

ferritic steels, austenitic steels, RK Rusinek - Klepaczko model, dislocation glide, twining, thermo-visco-plasticity

Affiliations:
Rusinek A.-National Engineering School of Metz (ENIM) (FR)
Rodriguez-Martinez J.A.-other affiliation
Klepaczko J.R.-IPPT PAN
Pęcherski R.B.-IPPT PAN
7.Rodriguez-Martinez J.A., Rusinek A., Klepaczko J.R., Pęcherski R.B., Extension of R-K constitutive relation to phase transformation phenomena, MATERIALS AND DESIGN, ISSN: 0261-3069, Vol.30, No.7, pp.2513-2520, 2009
Abstract:

In this paper an extension of the Rusinek-Klepaczko (RK) constitutive relation is presented. The new formulation proposed, allows defining the phase transformation effect observed on macroscopic scale using a phenomenological approach. The key point is to introduce in the original formulation of RK model a new stress component based on evolution of martensite, which takes into account strain, strain rate and temperature effects. Analytical predictions of the xtended constitutive relation are compared with experimental results for 301Ln2B steel.

Keywords:

RK model, phase transformation, austenitic steel

Affiliations:
Rodriguez-Martinez J.A.-other affiliation
Rusinek A.-National Engineering School of Metz (ENIM) (FR)
Klepaczko J.R.-IPPT PAN
Pęcherski R.B.-IPPT PAN

Conference abstracts
1.Frąś T., Luckner J., Nowak M., Nowak Z., Pęcherski R., Rusinek A., Stręk A., Zastosowanie kryteriów granicznych Burzyńskiego I. Metale i kompozyty metaliczno-ceramiczne II. Pianki metaliczne, PLASMET/2012, VIII Seminarium Naukowe Zintegrowane Studia Podstaw Deformacji Plastycznej Metali, 2012-11-20/11-23, Łańcut (PL), pp.1-4, 2012
2.Frąś T., Pęcherski R., Rusinek A., Experimental investigations of the influence of moderate strains and strain rates on the yield surface of OFHC copper, SolMech 2012, 38th Solid Mechanics Conference, 2012-08-27/08-31, Warszawa (PL), pp.122-123, 2012