The goal of this work is to predict ductile failure pipe-ring notched AISI 316L specimens, where notches mimic the geometry corrosion defects. Uncoupled damage models are used that end. Johnson-Cook and Lou-Huh criteria calibrated. uncoupled calibrated using experimental results from testing specimens. Calibration was achieved a hybrid experimental-numerical approach. Six notch shapes studied. ...

New specimen geometries with various stress states are designed and applied for dynamic loading tests. Oscillation-free force is measured during multiaxial tests in the strain range of 10 -4 – 3 s -1 . The deformation local fields specimens have been using high-speed camera evaluated by digital image correlation (DIC) techniques. It found that rate effects on fracture stressstate dependent. To ...

Abstract The study was based on the analysis of stamina steel flat bottom section transport warships, burdened by spherical pressure wave from non-contact explosion TNT at a distance 20 m under keel. This aims to determine mass required break hull. task solved finite element method (FEM) explicite using CAE program [1], in which hull’s modelled as thin shell space. burden with impulse specified...

A comprehensive benchmarking study has been carried out to determine the influence of mesh formulation and chip separation methods on reliability accuracy finite element modelling large diameter drilling operations. The Coupled Eulerian–Lagrangian updated-Lagrangian (with deletion) formulations available in ABAQUS/Explicit, together with re-meshing) DEFORM 3D are compared by simulating through-...

Abstract In order to investigate the effect of different double-pulse solid rocket motor metal diaphragm configurations on opening performance, a compartment device is designed. A modified Johnson-Cook principal structure model and damage criterion are used simulate pressure-bearing forces based finite element software. obtain parameters J-C model, Quasi-static tensile tests at strain rates 10 ...

Abstract This study presents an investigation of the plunge stage in joining AZ31B magnesium alloy with friction stir welding using two different 3D finite element models based on Arbitrary Lagrangian–Eulerian formulation and Coupled Eulerian–Lagrangian formulation. The investigations are made ABAQUS program. Johnson–Cook plastic material law Coulomb used both models. Models compared terms temp...

The aim of the present work is to contribute characterization biaxial tensile behavior commercially pure titanium, under various in-plane loading conditions at room temperature, by a non-contact digital image correlation system. Several conditions, with load ratio ranging from 4:0 0:4 and displacement rate 0.001 0.1 mm/s, are examined. It found that yield strength ultimate sample greater than u...

Isothermal compression behaviors of 5CrNiMoV steel were studied at temperatures 870, 800, 750, and 700 °C, with strain rates 0.001, 0.005, 0.01, 0.05, 0.1 s−1, the 870 800 °C are above Ac3, as well 750 below Ac3 temperature. The Modified Johnson–Cook (MJC) model Strain–Compensated Arrhenius (SCA) employed to demonstrate relationship between flow stress parameters. correlation coefficient (R) av...

Lattice structures, produced by metal additive manufacturing technology, can be a potential alternative in armor applications, which are important parts of defense technologies due to their shock wave damping, energy absorption and light-weight properties. Despite the fact that protection lattice structures against explosives has been frequently investigated literature, perforation performance ...

Electromagnetic forming is a high energy rate forming process. In this process, an electromagnetic Lorentz body force is used for deformation of products. In this article, Electromagnetic forming process was simulated for assembly of parts as an innovative method. In this research work, the effect of important parameters of process such as discharge energy, radius and width of rectangular groov...