Observation and simulation of motion and deformation for impact-loaded metal cylinders

Hickman, R.J.; Wise, J.L.; Smith, Jeffrey A.; Philip, Mersch, John; Robino, C. V.; Argüello, Jose G.

doi:10.1063/1.4971643

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…However, if we consider the impact conditions where some part of the plastic work is converted into heat, then a constitutive model of the material should be temperature-dependent. Co was described with the Johnson-Cook material properties [36]. In addition, it was assumed that the Taylor-Quinney coefficient χ is equal to 0.9 in both tested cases.…”

Section: Numerical Modelmentioning

confidence: 99%

Temperature Effects during Impact Testing of a Two-Phase Metal-Ceramic Composite Material

Postek

Sadowski

2019

Materials

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Metal-ceramic composite (MCC) materials can be used for manufacturing high-responsibility structures such as jet engines or cutting tools. One example of these materials is a two-phase wolfram carbide (WC) and cobalt (Co) composite. This MCC is a combination of hard WC grains with a Co metallic ductile binder. The resulting microstructure is a combination of two phases with significantly different mechanical behaviors. In this study, we investigate impact conditions, starting with an illustrative example of the Taylor impact bar where—although the process is very rapid—the equivalent plastic strain and temperature are higher in the adiabatic solution than those in the coupled solution. On exposing the WC/Co composite with a metallic binder to impact loading, heat is generated by plastic deformation. If the process is fast enough, the problem can be treated as adiabatic. However, a more common situation is that the process is slower, and the heat is generated in the ductile metallic binders. As a result, the associated grains are heated due to the conduction effect. Consequently, the process should be treated as coupled. When the impact is applied over a short time period, maximum temperatures are significantly lower if the process is analyzed as coupled rather than as adiabatic. The grains are immediately affected by temperature increase in the binders. Therefore, the heat conduction effect should not be omitted.

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Section: Numerical Modelmentioning

confidence: 99%

Temperature Effects during Impact Testing of a Two-Phase Metal-Ceramic Composite Material

Postek

Sadowski

2019

Materials

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“…Other authors [4][5][6][7] have also talked about the reliability of numerical models, the simulation of fluid flow and vortex, the simulation of stress and strain, and the definition of pre-stress and stress states using the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Measurement of strain and determination of stress state using a multi-chamber vertical cylindrical tank model

Islamović

Bajramović

2023

J. Phys.: Conf. Ser.

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Designing a new construction of large-volume multi-chamber tanks or converting existing single-chamber tanks into multi-chamber for storage of various types of petroleum products is a very demanding and responsible job, from the aspect of strain-stress analysis and the need to ensure structural integrity. From a wide range of conducted theoretical and experimental-numerical research, this paper singles out the applied method of similarity mechanics. The research was performed on a model of a four-chamber tank with dimensions reduced by 20 times (1:20) in relation to the real tank, made of steel sheets of quality S.0361. During the cold-water pressure test on the tank model (hydro test), the change of strain and stress state was monitored in the zones that were defined as critical by the preliminary numerical analysis by the finite element method (FEM). The results of these measurements, along with other reliable methods, can be very useful in the design of multi-chamber tanks with 5.000 m3 volume.

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“…both in grains and binders. The material properties for (1) the cobalt in binders are taken from [49], whereas data for the WC grains are included in [50]. The basic properties of the WC/Co cermet components are presented in Tables 1 and 2.…”

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confidence: 99%

Archives of Metallurgy and Materials

Postek

Sadowski

2020

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HIGH-VELOCITY IMPACT OF 2-PHASE WC/Co COMPOSITE PLATE -BEGINNING OF THE PROCESS2-phase composites are often used for high demanding parts that can undergo impact loads. However, most of the papers on dynamic loading concerns layered composites. In our opinion, the impact loads are not considered thoroughly enough. Good examples of 2-phase composites are: (1) a WC/Co cermet or (2) a monolithic ceramic Al 2 O 3 /ZrO 2 . The WC/Co cermet is often modelled as having ductile elasto-plastic Co matrix and ideally elastic WC grains. It is because of very high crushing resistivity of the WC.In this paper, we present an extension to earlier elaborated models ([44]) with the assumption of ideal elasticity of the grains. The new and general numerical model for high-velocity impact of the 2-phase composites is proposed. The idea of this novelty relies on the introduction of crushability of grains in the composite and thermo-mechanical coupling. The model allows for description of the dynamic response both composite polycrystals made of: (1) 2 different purely elastic phases (e.g. Al 2 O 3 /ZrO 2 ) or (2) one elastic phase and the second one plastic (e.g. cermet WC/Co), or (3) 2 elasto-plastic phases with different material properties and damage processes. In particular, the analysis was limited to the cases (2) and (3), i.e. we investigated the WC/Co polycrystal that impacted a rigid wall with the initial velocity equal to 50 m/s.

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Observation and simulation of motion and deformation for impact-loaded metal cylinders

Cited by 6 publications

References 7 publications

Temperature Effects during Impact Testing of a Two-Phase Metal-Ceramic Composite Material

Temperature Effects during Impact Testing of a Two-Phase Metal-Ceramic Composite Material

Measurement of strain and determination of stress state using a multi-chamber vertical cylindrical tank model

Archives of Metallurgy and Materials

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