From concept to engineering, and from design to test and manufacturing, the automotive industry relies on powerful virtual development solutions. CFD and crash simulations are performed in an effort to secure quality and accelerate the development process. The recent trends in cluster environments, such as multi-core CPUs, GPUs, cluster file systems and new interconnect speeds and offloading ca...

Abstract The sliding belt assembly plays a key role in spin reduction to protect the electronic components and smoothly control projectile posture. complete guided motion bore was reproduced by LS-DYNA software, where gunpowder pressure loaded on bottom. dynamic parameters of obtained simulation agree well with test, including axial velocity, acceleration rotation speed. Great occurs assembly, ...

In order to study the trajectory deflection of projectile penetrating obliquely into different materials, Lagrange algorithm LS-DYNA was used simulate three-dimensional model. The impact angle is 70°, concrete target and soil are penetrated respectively. state target, strain nephogram stress under maximum overload obtained. curves penetration depth, velocity, energy analyzed. results show that:...

Çarpma yükü altında plakların davranışı statik yüklemelerin aksine farklılık göstermektedir. Cismin plağa çarpma anında ve cisim plaktan teması kestikten sonrada plaktaki gerilme dağılımları değişmektedir. Yaptığımız çalışmada bu değişimlerini hesaba katarak iki plak levhası arasına konulan çekirdek malzemesi geometrisinin şekil optimizasyonu amaçlanmıştır. Bu amaçla önce mekanik özellikleri bi...

The Mode I and II Interlaminar Fracture Toughness (IFT) of Vectran/Epoxy composite material were investigated using the Double Cantilever Beam (DCB) 4 End Notched Flexure (4ENF) methods, respectively. Due to relatively low compressive strength Vectran (<10% its tensile properties), specimens hybridised by over wrapping with T800s/M21 prevent failure during testing. Experimental results then sim...

Often when vehicles interact with roadside hardware like guardrails, bridge rails and curbs, the interaction between the roadside hardware and the tire causes the tire to lose its air seal and "blow-out". Once the seal between the rim and rubber tire is lost, the tire deflates. The behavior of the deflated tire is much different than the behavior of an inflated tire such that when this behavior...

The implementation and evaluation of a high fidelity material model for dry fabrics is the main objective of this paper. Inflatable Aerodynamic Decelerators (IADs) and other airinflated structures quite often utilize woven fabrics due to their lightweight and high loading carrying capabilities. Design optimization of these inflated structures relies on a detailed understanding of the woven fabr...

Weighted deduction with aggregation is a powerful theoretical formalism that encompasses many NLP algorithms. This paper proposes a declarative specification language, Dyna; gives general agenda-based algorithms for computing weights and gradients; briefly discusses Dyna-to-Dyna program transformations; and shows that a first implementation of a Dyna-to-C++ compiler produces code that is effici...

Abstract In order to further improve the flight stability of explosively formed projectile, formation method tail EFP was studied based on polygonal liner. Under hexagonal charge structure, fins can be when structural parameters are matched. Through numerical simulation LS-DYNA, influence liner (curvature radius, linear thickness), height and shell thickness velocity, length-diameter ratio, com...

Abstract Ceramic materials are widely used in the field of armor protection because high hardness and low-density. In order to research ballistic performance Si 3 N 4 ceramic evaluate penetration effect, DOP test against 12.7 mm API was carried out. The results show that coefficient is range 1.85-4.26, thickness 1.85-4.26. On this basis, numerical simulation technology composite studied by usin...