Dissimilar joint with good quality and mechanical properties is one of the major problems the industries. One of the most commonly used methods to solve this problem is friction stir welding process. In this paper two different tool pin with simple cylindrical and screwed profile were used to finding optimization of friction stir welding parameters to reach best mixing flow, composite structure...

Differing from the structure of traditional parallel plate capacitive sensor a semi cylindrical capacitive sensor has been introduced in this present work to measure the soil moisture conveniently. Here, the numerical analysis method to evaluate the capacitance from the semi-cylindrical capacitive sensor is analyzed and discussed. The changes of capacitance with the variation of soil moisture o...

Abstract To explore the effects of bullet cylindrical difference on in-bore dynamic engraving resistance and muzzle swing, a finite element model bullet-barrel interaction is built. With proposed model, real bore bottom pressure curves are obtained through experiments. In numerical simulation, motion processes two all-copper bullets with different structures reproduced according to curves, so a...