Influence of boundary constraints on the residual stresses and deformations in a high strength steel plate after welding

2012 ◽  
pp. 267-274
Keyword(s):  
Residual Stresses ◽  
High Strength Steel ◽  
Steel Plate ◽  
High Strength ◽  
Boundary Constraints

scholarly journals Experimental and Numerical Investigation on the Perforation Resistance of Double-Layered Metal Shield under High-Velocity Impact of Armor-Piercing Projectiles

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 626
Author(s):  
Riccardo Scazzosi ◽  
Marco Giglio ◽  
Andrea Manes
Keyword(s):  
High Strength Steel ◽  
Steel Plate ◽  
Experimental Studies ◽  
Practical Interest ◽  
High Strength ◽  
Experimental Tests ◽  
Element Model ◽  
Transportation Systems ◽  
Metal Shield ◽  
Softening Parameter

In the case of protection of transportation systems, the optimization of the shield is of practical interest to reduce the weight of such components and thus increase the payload or reduce the fuel consumption. As far as metal shields are concerned, some investigations based on numerical simulations showed that a multi-layered configuration made of layers of different metals could be a promising solution to reduce the weight of the shield. However, only a few experimental studies on this subject are available. The aim of this study is therefore to discuss whether or not a monolithic shield can be substituted by a double-layered configuration manufactured from two different metals and if such a configuration can guarantee the same perforation resistance at a lower weight. In order to answer this question, the performance of a ballistic shield constituted of a layer of high-strength steel and a layer of an aluminum alloy impacted by an armor piercing projectile was investigated in experimental tests. Furthermore, an axisymmetric finite element model was developed. The effect of the strain rate hardening parameter C and the thermal softening parameter m of the Johnson–Cook constitutive model was investigated. The numerical model was used to understand the perforation process and the energy dissipation mechanism inside the target. It was found that if the high-strength steel plate is used as a front layer, the specific ballistic energy increases by 54% with respect to the monolithic high-strength steel plate. On the other hand, the specific ballistic energy decreases if the aluminum plate is used as the front layer.

scholarly journals Effect of focal position on laser-MAG arc hybrid weld bead of thick high-strength steel plate

2020 ◽  
Vol 38 (2) ◽  
pp. 131s-134s
Author(s):  
Kazuya ISHIDA ◽  
Shinichi TASHIRO ◽  
Masami MIZUTANI ◽  
Manabu TANAKA
Keyword(s):  
High Strength Steel ◽  
Steel Plate ◽  
High Strength ◽  
Weld Bead ◽  
Focal Position

Residual stresses of box and I-shaped columns fabricated from S960 ultra-high-strength steel

2020 ◽  
Vol 166 ◽  
pp. 105904
Author(s):  
Dongxu Li ◽  
Anna Paradowska ◽  
Brian Uy ◽  
Jia Wang ◽  
Mahbub Khan
Keyword(s):  
Residual Stresses ◽  
High Strength Steel ◽  
High Strength ◽  
Ultra High Strength Steel

Numerical Simulation of Residual Stresses due to Multipass Welding in High Strength Steel Plates and Validation against Experimental Measurements

2018 ◽  
Vol 941 ◽  
pp. 269-273
Author(s):  
Constant Ramard ◽  
Denis Carron ◽  
Philippe Pilvin ◽  
Florent Bridier
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Plates ◽  
Contour Method ◽  
Hole Drilling ◽  
Experimental Measurements ◽  
Element Analysis ◽  
Multipass Welding

Multipass arc welding is commonly used for thick plates assemblies in shipbuilding. Sever thermal cycles induced by the process generate inhomogeneous plastic deformation and residual stresses. Metallurgical transformations contribute at each pass to the residual stress evolution. Since residual stresses can be detrimental to the performance of the welded product, their estimation is essential and numerical modelling is useful to predict them. Finite element analysis of multipass welding of a high strength steel is achieved with a special emphasis on mechanical and metallurgical effects on residual stress. A welding mock-up was specially designed for experimental measurements of in-depth residual stresses using contour method and deep hole drilling and to provide a simplified case for simulation. The computed results are discussed through a comparison with experimental measurements.

scholarly journals High-Power and High-Brightness Laser Butt Welding with Using Hot Wire for Thick High-Strength Steel Plate

2011 ◽  
Vol 29 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Terumasa OHNISHI ◽  
Yousuke KAWAHITO ◽  
Masami MIZUTANI ◽  
Seiji KATAYAMA
Keyword(s):  
High Power ◽  
High Strength Steel ◽  
Steel Plate ◽  
High Strength ◽  
Hot Wire ◽  
High Brightness ◽  
Butt Welding
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