Modification of the punch geometry can greatly reduce force necessary to perform perforation belt. This paper presents research on axially non-symmetrical piercing punches – double sheared one and with a cylindrical bowl. FEM analysis was performed for variable tip angle β in 60-150° range or bowl radius R 5.25-10 mm constant diameter D = 10 TFL10S Based obtained results, influence (for punch) ...

Consequences of new quantum spin perspective in gravity are far-reaching. Results this novel loop gravity, i.e., the modification equation geometrical operators such as area and volume operator known. Using newly proposed formula from perspective, magnitude fundamental constants reduced Planck constant ℏ, gravitational G, speed light c, Boltzmann kβ , fine structure α, can be validated. With ai...

Forming sheet metals under blast loading or the explosive forming technique has many advantages for productions, but it is restricted due to its accuracy. This paper introduces a novel theoretical-empirical study metal based on simple plasticity principles. It provides method of producing cone parts loading, including an analytical model and experimental validation. Firstly, underwater explosio...