ES404 Materials Science & Engineering Lecture 3a PDF

ES 404 MATERIALS SCIENCE & ENGINEERING B Y E N G R. D E N N IS E. G A N A S  LECTURE 3a MECHANICAL PROPERTIES of MATERIALS E N G R. D E N N IS E. G A N A S ES404  MECHANICAL PROPERTY  a measure of a material’s ability to carry or resist m...

ES 404 MATERIALS SCIENCE & ENGINEERING B Y E N G R. D E N N IS E. G A N A S  LECTURE 3a MECHANICAL PROPERTIES of MATERIALS E N G R. D E N N IS E. G A N A S ES404  MECHANICAL PROPERTY  a measure of a material’s ability to carry or resist mechanical forces (applied loads) or stresses  is usually determined by subjecting prepared specimens to standard laboratory tests E N G R. D E N N IS E. G A N A S ES404  STRENGTH  Strength refers to the material's ability to withstand an applied force without failing or breaking. E N G R. D E N N IS E. G A N A S ES404  STIFFNESS  Stiffness refers to a material's or structure's resistance to deformation when a force is applied. It is a measure of how much a material will deform (stretch, compress, bend, etc.) in response to an applied force. E N G R. D E N N IS E. G A N A S ES404  DUCTILITY  Ductility is a measure of the degree of plastic deformation that has been sustained before ultimate fracture.  For repeated loads, ductile materials is better than brittle materials. E N G R. D E N N IS E. G A N A S ES404  BRITTLENESS Brittleness is the tendency of a material to fracture without appreciable deformation. E N G R. D E N N IS E. G A N A S ES404  MALLEABILITY Malleability is the ability of a material to be severely deformed plastically in compression without fracture E N G R. D E N N IS E. G A N A S ES404  ELASTICITY Elasticity is the ability of a material to strain under load and then return to its original size when unloaded. E N G R. D E N N IS E. G A N A S ES404  PLASTICITY Plasticity is the ability of a material to strain under load and will not return to its original dimension when the load is removed. E N G R. D E N N IS E. G A N A S ES404  RESILIENCE Resilience is the capacity of a material to absorb energy when it is elastically deformed and then upon unloading, to have this energy recovered. E N G R. D E N N IS E. G A N A S ES404  TOUGHNESS Toughness is the capacity of material to withstand a shock load without breaking. It is the ability of a material to absorb energy during plastic deformation up to rupture. E N G R. D E N N IS E. G A N A S ES404  HARDNESS Hardness is a measure of material’s resistance to permanent deformation (indentation) under static or dynamic loading E N G R. D E N N IS E. G A N A S ES404  MACHINABILITY Machinability refers to the relative ease with which a material can be cut. E N G R. D E N N IS E. G A N A S ES404  CREEP Creep is a slow process of plastic deformation that takes place when a material is subjected to a constant condition of loading below its normal yield point. E N G R. D E N N IS E. G A N A S ES404  FATIGUE Fatigue refers to the progressive and localized structural damage that occurs when a material is subjected to repeated or fluctuating loads, even if those loads are below the material's ultimate tensile strength. E N G R. D E N N IS E. G A N A S ES404 E N G R. D E N N IS E. G A N A S ES404