Full and partial penetration welding using high power lasers exhibit different melt pool geometries. The main difference is that full welds tend to widen at the root side. In recent years, laser has been modeled sophisticated multiphase numerical models. However, less computationally-complex thermo-mechanical models are capable of accounting for widening phenomenon in lacking. this study, hybrid was performed modes on butt joints structural steel. A model presented used a three-dimensional...

Several joining methods exist, and these are generally categorized as bolted methods, adhesive bonding or hybrids of the two. Over years several techniques have been proposed to improve load transfer between components. This paper presents a new bolted/pinned for composite applications. is done by introducing patch-type reinforcement. Both static fatigue test results presented compared with unreinforced joint data. Experimental data shows that significant improvements obtained both...

This article investigates a common rail cylinder lubrication system for large two-stroke marine diesel engines using electronically controlled injectors. The is studied the Bosch rate of injection measurement technique. injector has buildup mass flow approximately 1 ms as opens until nozzle choked from cavitation. Using highly viscous fluid, method able to predict injected amount with an error 5% or lower nearly entire tested delivery range 2–21 mg. Lubrication liners and piston rings...

This study presents the implementation and derivation of a Volume Fluid (VoF) solver capable taking into account pressure driven phase change handle three fluids. The implemented code is designed to investigate internal nozzle cavitation subsequent injection jet breakup. An extended model also that can in presence third phase. Detailed description mathematical system presented. validated on one-dimensional benchmark case from literature verified an experimentally well-documented geometry....

This paper is to determine the flow stress curve of 5049-O aluminium alloy by a tube hydraulic bulging test with fixed end-conditions. During this test, several tubular specimens are bulged under different internal pressures before their bursting, and corresponding height wall thickness at pole measured. An inverse strategy developed constitutive parameters materials based on experimental data, which combines finite element method gradient-based optimization techniques. In scheme, objective...

In this paper, a new model for cavitation induced primary break-up is proposed, which able to map the influence of cavitating nozzle flow on spray formation.The applicable viscous liquid sprays, where Reynolds number below 800.For such systems, enhanced when bubbles burst at exit.The proposed describes transition from inside nozzle, modelled using homogeneous equilibrium (HEM) method, first droplets Eulerian-Lagrangian method.Thus, providing boundary conditions calculation secondary and exit...

Understanding the disturbances introduced by cavitation inside spray nozzles is important, when simulating formation of highly viscous liquids.In this paper, a new model for cavitation-induced primary break-up proposed, which able to map influence cavitating nozzle flow on formation.Detailed experimental and numerical investigations have been performed in order develop an improved [1].The proposed describes transition from nozzle, modelled using homogeneous equilibrium (HEM) method, first...

The paper presents a hybrid strategy to determine constitutive parameters for thin-walled tubes based on experimental responses from hydraulic bulge tests. This developed procedure integrates the analytical model, finite element analysis and gradient-based optimization algorithm, where initial guesses of material are generated quickly by theoretical method, then they input an inverse framework integrating Gauss-Newton algorithm method. solving this problem leads more accurate identification...

Laser forming of sheet metal has the potential to add growing repertoire laser processing. This is particular interest for flexible manufacturing and rapid prototyping. A factor limiting practical use planning process parameters, such as scan path, power, speed, spot size, dwell time, etc. study presents a new method calculating error between target shape current shape. The based on geometrical information uses projection second derivative geometry unto geometry. By comparing projected with...

This paper investigates a common rail cylinder lubrication system for large two-stroke marine diesel engines using electronically controlled injectors. The is studied the Bosch rate of injection measurement technique injector has buildup mass flow approximately 1 ms as opens until nozzle choked from cavitation. Using highly viscous fluid, method able to predict injected amount with an error 5% or lower nearly entire tested delivery range 2 mg 21 mg. Lubrication liners and piston rings...