Max normal stress theory is used for brittle materials.
The maximum principal stress theory is generally applicable to materials that exhibit ductile behavior, such as many metals and alloys, where failure occurs when the maximum principal stress in a material exceeds its ultimate tensile strength. This theory is not suitable for brittle materials, as their failure is often governed by factors other than stress alone.
The elasticity of a material is the measure of it's elastic properties, how bendable it is. where as it's ultimate strenght is the force which you require to be able to break that material into 2
power!
max well
Max Planck
max planck
Power is held by bureaucrats and administrators. == ==
First of all, its Max Planck, and it was in 1900.
Max R. Uhlemann has written: 'Resource on stress and burnout in education' -- subject(s): Bibliography, Burn out (Psychology), Job stress, Teachers
Max weber
The Quantum Theory.
Max Plank