Fig 5 - uploaded by Jacob Nagler
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(a) Radial displacement Vs. the radial direction for specific time instant values. (b) Radial stress Vs. the radial direction for specific time instant values.
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![Table 1 : Material data as appear in Lee et al. [29]](profile/Jacob-Nagler/publication/322273841/figure/tbl1/AS:668599467397124@1536417943141/Material-data-as-appear-in-Lee-et-al-29_Q320.jpg)
General finite element (F.E.) coupled transient-dynamic model of three layers cylinder in polar coordinates under stress plane assumption, will be introduced and discussed. We have found through an analytical analysis and literature comparison that four main factors might affect the solution qualitative and quantitative behavior: (1) Temperature-st...
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Citations
... Studies on main aerospace structural components subjected to thermomechanical shocks for various materials, including trials to control the effects, have been demonstrated by previous works. [6][7][8][9] Specifically, Javani et al. 6 have investigated functionally graded materials (FGMs) with shallow spherical shell structures that could be adjusted to the spaceship or satellite outer structure; Oh et al. 7 have investigated damaged cryogenic composite laminate specimens; and Nagler 8,9 have investigated different container types for various energy storage purposes subjected to thermomechanical impacts. ...
... Studies on main aerospace structural components subjected to thermomechanical shocks for various materials, including trials to control the effects, have been demonstrated by previous works. [6][7][8][9] Specifically, Javani et al. 6 have investigated functionally graded materials (FGMs) with shallow spherical shell structures that could be adjusted to the spaceship or satellite outer structure; Oh et al. 7 have investigated damaged cryogenic composite laminate specimens; and Nagler 8,9 have investigated different container types for various energy storage purposes subjected to thermomechanical impacts. ...
This paper presents thermo-elastic shock wave model components of projectile, target and muzzle tube during the initial start of penetration. The penetration model is combined from pressure and temperature (e.g., mechanical and thermal shock) act separately at the moment of penetration (few micro-seconds) into a homogenous or first layer armor body. Armor's shape and material will be investigated based on contact principal stress. The reciprocal influence between the penetrator and the armor in the aspect of the projectile nose shape will be also demonstrated. Also, the penetrator thermo-elastic material's durability will be examined, based on Mises criterion. The examination for the initial elastic contact stress impact will be performed by using explicit solution to temperature – displacement coupling equilibrium, based on commercial finite elements modelling. Additionally, modified impact contact stress model based on both mechanical and thermal energies was proposed and found to agree with literature. Brief conceptual analysis of projectile-shield interactions was examined. Finally, shooting tube muzzle thermo-elastic analysis was performed alongside literature comparison, which was found to agree qualitatively and quantitatively. Muzzle tube material impact analysis has been performed. Finally, muzzle tube obey the rule that shorter cylinder length tube develops higher muzzle tube principal stresses.
... According to Sherman & Schlumm [2] and also brought by others [6][7][8][9], monolithic ceramics exhibits damage in the form of cracks due to high tensile stresses, inherent low fracture toughness, and the presence of processing flaws when subjected to high heat transfer or rapid changes in temperature (e.g. thermal shock [2,10]). ...
... .37 10 1 0.21 34 [ / ] 320 10 Jm ...
We consider the failure mechanics problem of multi materials laminated systems versus monolithic materials, based on brief literature review. We note the mechanical properties distinctions (tensile strength, flexural strength, fracture toughness and work of fracture parameters) including advantages and disadvantages between those materials with some applications. In the end, general design comprehensions dealing with composite laminated and monolithic materials are elaborated in the context of mechanics of failure.
This paper presents thermo-elastic shock wave model components of projectile, target and muzzle tube during the initial start of penetration. The penetration model is combined from pressure and temperature (e.g., mechanical and thermal shock) act separately at the moment of penetration (few micro-seconds) into a homogenous or first layer armor body. Armor's shape and material will be investigated based on contact principal stress. The reciprocal influence between the penetrator and the armor in the aspect of the projectile nose shape will be also demonstrated. Also, the penetrator thermo-elastic material's durability will be examined, based on Mises criterion. The examination for the initial elastic contact stress impact will be performed by using explicit solution to temperature – displacement coupling equilibrium, based on commercial finite elements modelling. Additionally, modified impact contact stress model based on both mechanical and thermal energies was proposed and found to agree with literature. Brief conceptual analysis of projectile-shield interactions was examined. Finally, shooting tube muzzle thermo-elastic analysis was performed alongside literature comparison, which was found to agree qualitatively and quantitatively. Muzzle tube material impact analysis has been performed. Finally, muzzle tube obey the rule that shorter cylinder length tube develops higher muzzle tube principal stresses.
