Search results for " LFW"

Numerical modelling of the linear friction welding process

2010

Linear friction welding (LFW) is a solid-state joining process applied to non-axisymmetric components. LFW involves joining of materials through the relative reciprocating motion of two components under an axial force. In such process the heat source is given by the frictional forces work decaying into heat determining a local softening of the material and proper bonding conditions due to both the temperature increase and the local pressure of the two edges to be welded. In the present work the authors present a numerical model of the linear friction welding process of AISI 1045 parts. The numerical model allowed to highlight the process mechanics and the physical conditions which must be r…

Friction based solid state welding processes

2012

Trasmissioni per sistemi di propulsione ibrida e Linear Friction Welding

2017

Trasmissioni per sistemi di propulsione ibrida. In tale ambito presentano interessanti caratteristiche e prestazioni, le trasmissioni a variazione continua del rapporto di tipo Power Split (PS-CVTs). La progettazione di tali trasmissioni può essere molto insidiosa a causa della notevole numero di opzioni possibili e della complessità costruttiva. Una vasta letteratura, sia sperimentale che teorica, si è occupata dell'analisi, dell'ottimizzazione e del controllo, di specifiche soluzioni costruttive. Tuttavia la selezione del layout è fondamentale e qualunque scelta aprioristica, a volte dettata solo dalla pratica, potrebbe portare a soluzioni sub-ottimali, nonostante il tempo e le risorse im…

Fundamental investigation on the mechanical behavior of weld seams

The solid state welding processes allow joints free from defects with reduced residual stresses and low distortion. However, such processes are generally characterized by a complex mechanical junction because of the particular material flow. Therefore, the design and optimization of the processes in which the solid bonding phenomenon occurs are difficult and requires a large number of tests. The purpose of this research is the description on the mechanical behavior of welded seams obtained through the friction stir welding (FSW) and linear friction welding (LFW) processes by analyzing the same phenomenon that occurs in both metallurgical processes, named the solid bonding phenomenon. The ai…