(Solved): For aluminium alloys, the stress-strain relationship can often be written on the form e=0 ...
For aluminium alloys, the stress-strain relationship can often be written on the form ?e?=?0?+Q(1?exp(?C??)) where ???,Q and C are material parameters. a) Use this stress-strain relationship and find the strain ?u? (expressed using the parameters) when necking occurs under uniaxial tension. b) Express the tensile strength, su?. i.e. the engineering stress at maximum force in the specimen, using the parameters ?0?,Q and C.