Accident with ball magnet EMDR motor generator For a rotating Neodynium Magnet sphere, we need to look at the hoop stresses developed due to rotation and compare them with the mechanical stress (Tensile) that the material can withstand up to failure.
The general formula can be applied: HoopStress = Density x AngularSpeed Squared x Radius Squared
Get Units correctly. Using SI bellow for consistency:
For a typical Neo Magnet and approximate numbers: Density=7.5g/cm^3 = 7500Kg/m^3 Tensile Strength=75Newton/mm=75000000Pa (N/m^2) or 75x10^6 Pascal Also AngularSpeed in Rad/sec 1 rpm=0.1047rad/sec Or 1 rps=6.2832 rad/sec
So as an example: A sphere of 1 cm radius=0.01m With density of 7500Kg/m^3 Rotating at 100000 rpm Develops a HoopStress of 7500 x (100000x0.1047)^2 x 0.01^2 =82215675 Pa or 82x10^6 Pa Already above the tensile strength. Smaller radius allows for higher speeds. Eg a 6mm diameter sphere , radius 3mm or 0.003m the stress at 100k rpm is about 7.5 x10^6Pa Well bellow the limits of failure, all else being in good condition, eg no cracks, inclusions, and so forth.
So be care full out there add a factor of safety 2-5 the higher the better, just to be sure, and an adequate Lexan enclosure.
Der Urzeit Code - Die ökologische Alternative zur umstrittenen Gen-Technologie Lässt sich das globale Ernährungsproblem endlich lösen -- ohne Gen-Technologie...
Hans Wahler's insight:
Ancient code - the eco-friendly alternative to the controversial gene-technology
Can be the global food problem finally solved - without gene technology? «This post reveals the secret of a sensational biological discovery at the pharmaceutical giant Ciba (Novartis): in laboratory experiments, researchers there had cereal and spawn a» electrostatic field «suspended - so a simple high-voltage field, where no current flows. Result: Growth and yield could be increased massively in this way! At the same time grew so complete surprise» ur tenses ", which already are extinct. The pharmaceutical company patented the revolutionary process - and stopped the research. Why? Because» ur grain «from the electric field in contrast to modern seed varieties hardly pesticides needed - so plant protection products, as she were primarily drove Ciba
The discovery was forgotten - without having the scientific community by her took notice. Together with Daniel Ebner, a son of the late researcher Guido Ebner, the Swiss author Luc reveals the detailed principle of operation of the revolutionary experiment finally bade.The electric field technology is the eco-friendly alternative to the controversial genetic engineering seeds. In the large-scale trial she should be provided now free farmers in Africa.
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