Closed-cell cellular materials gained tremendous interest in their application aerospace, shipbuilding and defence industries due to exceptional impact energy absorption lightweight characteristics. To assess the suitability of these practical utilisation, a proper characterisation dynamic loading is necessary. This paper investigates closed-cell aluminium foam's deformation behaviour low-veloc...

Hybrid ceramic/composite targets are acknowledged to provide effective impact protection against armor piercing projectiles, which is why the research on this topic continuously developing further. In work, a nonlinear dynamic finite element (FE) simulation method developed systematically explore ballistic perforation behaviors of hybrid ceramic/woven-fabric reinforced polymer (WFRP) composite ...

Abstract The muzzle shock wave has a great impact on the airborne structure, personnel and equipment. Therefore, flow field of aircraft gun is used as research object, based three-dimensional reynolds-averaged Navier-Stokes control equation standard k − ε turbulence model, finite element simulation model powder gas motion process in after-effect period without considering projectile established...

in this paper, single, bi-layered and three-layered tube hydroforming processes were numerically simulated using the finite element method. it was found that the final bulges heights resulted from the models were in good agreement with the experimental results. three types of modeling were kept with the same geometry, tube material and process parameters to be compared between the obtained hydr...

micro-electro-mechanical systems (mems) are combination of electrical and mechanical components in micron dimensions. in recent years, holding, actuating methods and handling of mems components such asmicrogripper, microsensors and etc. have been deeply studied. microgrippers for handling, positioning andassembling of micro components are very useful so that for clamping need actuation created ...

For a class of uncertain continuously networked Lurie control systems with both sensor-to-controller time-delay and controller-to-actuator time-delay, the problem codesigning its observer fault-tolerant controller based on an event-triggered mechanism under actuator failure is investigated. Firstly, considering that state system cannot be measured directly, constructed node. Secondly, to reduce...

Abstract This article studies the Takagi-Sugeno (T-S) fuzzy delayed sampled-data $$\mathcal {H}_\infty $$ H ∞ control problem for a class of intelligent suspension systems with varying vehicle load and frequency-domain constraint. The T-S model is utilized to characteri...

The purpose of introducing ultrasonic vibrations in the tube hydroforming process is to create more formability by obtaining a lower corner radius, improve thickness distribution of the wall and provide good tribological conditions at the tube and the die interface. Vibrations imposed on the die create alternating gaps which improve the formability in the tube hydroforming process in the presen...

Biomechanical model of soft tissue derived from experimental measurements is critical for developing a reality-based model for minimally invasive surgical training and simulation. In our research, we focus on developing a biomechanical model of the liver under large tissue deformation. This paper presents the experimental apparatus, experimental data, and methods to model the experimental data ...

We present a parallel octree-based finite element method for large-scale earthquake ground motion simulation in realistic basins. The octree representation combines the low memory per node and good cache performance of finite difference methods with the spatial adaptivity to local seismic wavelengths characteristic of unstructured finite element methods. Several tests are provided to verify the...