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    Wyświetlanie 1-4 z 4
    Tytuł:
    Building and Validation of the Johnson-Cook Constitutive Model of Nano-Composite NANOS-BA® Steel for Armour Applications
    Autorzy:
    Wiśniewski, A.
    Żochowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/403264.pdf
    Data publikacji:
    2014
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    numerical simulations of penetration
    nanosteel
    penetration of steel
    API projectile
    Opis:
    Constitutive modeling of the NANOS-BA® steel is described in this article. Results of the experiments (quasi-static uniaxial tension and uniaxial compression, high strain rate compression with use of the Split Hopkinson Pressure Bar) are shown. On the basis of the experiments results, the values of constants of the Johnson-Cook (J-C) model for the NANOS-BA® steel were determined. Verification of the determined values of constants was described, in which the stresses and strains obtained in samples in experiments and simulations were compared. The additional verification of the determined parameter values was the comparison of the depth of penetration tests (DP tests) results of NANOS-BA® steel plates placed on the Armox 500T „witness” plate fired with a 12.7 mm B-32 projectile, obtained experimentally and in simulations. Small differences between simulation and the experiments results testify that the determined values of constants of J-C model for NANOS-BA® steel provide good agreement with experiments.
    Źródło:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2014, 5, 2 (16); 7-18
    2081-5891
    Pojawia się w:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical-Experimental Analysis of Applicability of NANOS-BA Steel for Armour
    Autorzy:
    Wiśniewski, A.
    Żochowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/403669.pdf
    Data publikacji:
    2013
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    mechanics
    numerical simulations of penetration
    nanosteel
    penetration of steel
    API projectile
    Opis:
    Described in this paper is the analysis of the applicability of NANOS-BA steel for armour. The results of depth of penetration (DP) tests of the NANOS-BA steel plates placed on the Armox 600T „witness” plate and fired at with the 12.7 mm B-32 type projectile are shown. These results are compared to the Al2O3 ceramic plate penetration with the use of the same method. In both cases the armour was of similar area density (approx. 39 kg/m2). The theoretical analysis of the applicability of the NANOS-BA steel in a layered armour was conducted and numerical simulations of the DP tests were performed. Additional simulations were made for two variants of layered armour penetration: in variant 1 - One of the layers in construction was of the NANOS-BA steel, in variant 2 - One of the layers was of special ceramics. The process of the simulations verification is described, in which the deformations of the „witness” plate obtained experimentally are compared to the results of the simulations. Small differences (< 2 mm) of penetration were obtained in the simulations and experimentally confirmed that the simulations were performed correctly.
    Źródło:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2013, 4, 4 (14); 15-26
    2081-5891
    Pojawia się w:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Building and Validation of Numerical Models of the B-32 Type Armour-Piercing Projectiles
    Autorzy:
    Wiśniewski, A.
    Żochowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/403885.pdf
    Data publikacji:
    2013
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    mechanics
    terminal ballistics
    numerical simulations of penetration
    penetration of steel
    API projectile
    Opis:
    Process of building and the validation of the numerical models of the B-32 type armour-piercing incendiary (API) projectile is described in this article. Results of projectile compression tests (static and under high strain rates with the use of the modified Split Hopkinson Pressure Bar) are shown. On the basis of this, the values of the Johnson–Cook (J–C) strength model parameters for the projectile core material (N12e steel) were determined. This article presents results gained from simulations of the tests, in which the B-32 type projectile was modelled with the use of determined values of the J–C strength and failure models parameters. The process of the parameters values verification was described, in which the stress and strain obtained from samples in experiments and simulations were compared. Additional verification of the determined parameters values was comparison to the depth of penetration (DP) tests results of the Armox 500T plates fired with the 12.7 mm B-32 type projectile, obtained experimentally and in simulations. Small differences (< 5%) between stress and penetration depths obtained in the simulations and in the tests showed that the J–C parameter values were determined correctly.
    Źródło:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2013, 4, 2 (12); 19-30
    2081-5891
    Pojawia się w:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical-Experimental Evaluation of the Armour Protection Capabilities
    Autorzy:
    Wiśniewski, A.
    Żochowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/403544.pdf
    Data publikacji:
    2015
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    mechanics
    composite armour
    7.62 mm API BZ projectile
    numerical simulation
    Opis:
    This paper presents a numerical and experimental study of a composite add-on armour panel used for protection of lightweight armoured vehicles impacted by the 7.62 mm API (Armour Piercing Incendiary) BZ projectile (2nd level of International Agreement STANAG 4569). The composite armour consists of a number of ceramic tiles supported by one layer of aramid fabric placed inside an aluminium casing. The problem of the impact of the projectile onto the composite armour has been solved in three-dimension space (3D) with the use of CAD and CAE methods implemented in Ansys Autodyn v15 software. On the basis of the results of computer simulations, the proportions of the thickness of the armour layers were chosen. After that, the real model of the composite armour was built and tested in the firing range. The results obtained in the simulations were compared with the depth of penetration (DP) tests results, and satisfying agreement was obtained.
    Źródło:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2015, 6, 3 (21); 7-18
    2081-5891
    Pojawia się w:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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