
22 Forensic Engineering Fundamentals
Figure 2.14 represents a typical stress–strain curve. e shape and consequently the behavior
of the material will vary according to the material characteristics. Over the linear portion of
the curve, Hooke’s law or Young’s modulus, is given by
ε
γ
;
(2.35)
where
E is used for normal stress and strain
G is used for shearing stress and strain
Young’s modulus is also known as the modulus of elasticity.
e stress–strain curve can be used to characterize the strength characteristics of the
material. Engineering materials made of metals are generally classied as either ductile or
brittle. Ductile materials have ...