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Unformatted text preview: stress at which def
becomes permanent in a tensile test.
Young’s modulus The elastic property
describes the inherent stiffness of the mat
the slope of the stress-strain curve in the uniform corrosion A common
thermal shock A failure mechanism that can result
when a brittle material is subjected to a sudden change1-14-98 plm corrosion resulting from a time-v
pg028 [V] G2 7-27060 / IRWIN / Schaffer
location of the local anodic regio
(usually a decrease) in temperature.
thermodynamics The science dealing with the
uniform strain u The strain i
relationships between the thermal properties of matter
occurs before reaching the ultima
Part I Fundamentals
Deformation up to this point is u
and the external system variables such as pressure,
throughout the gage section so th
ple ampliﬁer to a complete
temperature, and composition.
2.3 THERMODYNAMICS AND KINETICS The study of the rate of reactions and the
factors that affect them, including the thermal properties of
uter known as a microprocessor. Thermodynamics is the study of the relationships between theinﬂuence of time
on phase transformations.
n The accumulation of mobile matter and the external system variables such as pressure, temperature, and composition.
Thermodynamic considerations are fundamental in determining whether chemical and
ear grain boundaries or surfaces. physical reactions can occur. Kinetics, on theComposites made how rapidly reaclaminate composites
other hand, determines from stacking
tions can proceed. The reactions and a predetermined the structure of the resulting
several laminae in their rates determine sequence of ﬁber
iometric compounds with
material, which, in turn, determines the properties. Therefore, a working knowledge of
m ratios such as AlLi, Ni3 Al, thermodynamics and kinetics is necessary for understanding material behavior.
Basic thermodynamic principles show that a reaction occurs onlyemployed in a
Al, and Mg 2 S.
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