Influence of shock induced polymorphic transition on penetration in steel
نویسندگان
چکیده
The effects of polymorphic transition for the impact of a 27NCD10 steel projectile on a 27NCD10 steel target at 1280 m/s is presented. Comparisons between results of 2D numerical calculations performed with and without polymorphic transition show the influence of this phenomenon on stress distribution and tension zones in the target and in the projectile. Good agreement between experimental and calculated free surface velocity profiles is obtained with polymorphic transition and damage models taken into account. Résumé Les effets de la transformation polymorphique dans le cas de l'impact d'un projectile en acier 27NCD10 contre une cible en acier 27NCD10 à une vitesse d'impact de 1280 m/s sont présentés. Les comparaisons entre les résultats des simulations numériques 2D réalisées avec et sans modèle de transformation polymorphique montrent l'influence de ce phénomène sur la distribution des contraintes et sur la localisation des zones de tension. Un bon accord entre les diagrammes de vitesse de surface libre expérimentaux et calculés a été obtenu en considérant un modèle de transformation polymorphique associé à un modèle d'endommagement.
منابع مشابه
The effect of activating fluxes on 316L stainless steel weld joint characteristic in TIG welding using the Taguchi method
Gas tungsten arc welding is fundamental in those industries where it is important to control the weld bead shape and its metallurgical characteristics. However, compared to the other arc welding process, the shallow penetration of the TIG welding restricts its ability to weld thick structures in a single pass (~ 2 mm for stainless steels), thus its productivity is relativity low. This is why th...
متن کاملInvestigation of Transformation Induced Plasticity in High Al–low Si TRIP Steel
This study was conducted in order to investigate the influence of plastic deformation on the transformation of retained austenite in a TRIP steel with a high content of Al and a low content of Si. To the aim, appropriate treatments were used to produce the starting material (TRIP steel). The microstructure of the obtained steel was composed of bainite and phases including ferrite and retained a...
متن کاملAnalytical and Numerical Consideration of Projectile Density Effect on Its Penetration Ability in Alumina Armor
In this paper, penetration of high velocity impact of 4340 steel and tungsten carbide projectiles with specific shapes in to ceramic armor that includes 10 mm alumina (95%) is considered analytically and simulated with Ls-Dyna software. Bernoulli equation used to consider the penetration velocity in ceramics, shows that the penetration is better and easier by increasing projectile density. The ...
متن کاملImpact of Wastewater Irrigation on Soil Mechanical Properties in the Green Space of Mobarakeh Steel Complex
Long-term use of treated wastewaters for irrigation adds compounds and/or ions to soils which might alter the soil physical, hydraulic and mechanical properties. Soil mechanical properties are closely linked with the plant growth. This study was conducted to investigate the effect of short-, mid- and long-term applications of the treated wastewater of Mobarake Steel Company in Isfahan on the so...
متن کاملبررسی تحلیلی و عددی ضخامت آستری خرج گود
One application of energetic materials in the military is shaped charged warhead. The most important application of this type of warheads is penetration into target. For this purpose, several factors influence the design of shaped charge. Liner thickness is one of most effective factors in the design of shaped charge, which has a significant role in jet Velocity and depth of penetration in targ...
متن کامل