Yield stress, proof stress, toughness, Young's modulus, Hooke's law
http://nsb.wikidot.com/ea-1-2-1-4 Yield stress, proof stress, toughness, Young's modulus, Hooke's law. Hooke's Law "Stress is proportional to strain up to the PROPORTIONAL LIMIT (1)" This means that any increase in stress will bring about a proportional increase in strain up to the proportional limit. Written mathematically, the formula of Hooke's Law is: (1) E = σ ε E is a constant. ( Young's Modulus [see below]) σ is stress (Pa) ε is strain Young's Modulus Young's Modulus is a measure of the stiffness of a material. It is also known as the Modulus of Stiffness/Elasticity This is the constant that is represented in Hooke's Law (see above) Proportional Limit This is when an increase in stress no longer has a linear relationship with an increase in strain. Sometimes this is known as the elastic limit. Resilience This is the ability of a material to retain its shape after...