Constitutive Equations - Lesson Summary
Polymers are flexible molecules which can be stretched or deformed by weak forces.
The Two Types of Mechanics Laws are:
Conservation laws are not universal as they often encode the behavior of specific materials and even experimental conditions.
The Constitutive Equation of state provides the linkage between stress and kinematics.
The issue of yield-stress is somewhat complicated by the fact that if one waits long enough everything flows.
The two types of flows that are used to characterize polymeric flows are:
Shear free flow
The three independently accessible values in a simple shear flow are:
First normal stress difference
Second normal difference
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