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What is one of Fichera's research areas?

Linear elasticity
Fluid dynamics
Thermodynamics
Electromagnetism

Answer

Linear elasticity is one of Fichera's research areas. It is a branch of mechanics that studies the behavior of elastic materials under small deformations. Elastic materials are those that return to their original shape after being deformed. Linear elasticity assumes that the relationship between stress and strain is linear, which means that the material's stiffness is constant.