What is the definition of 'stiffness' in structural contexts?

Stiffness in structural contexts refers specifically to the resistance of a material to deformation when subjected to an applied load. This property is crucial when designing structures, as it determines how much a structure will deflect or bend when forces are applied. A material with high stiffness will maintain its shape and resist deformation better than one with low stiffness, making it important for components that require stability and integrity under various loading conditions.

For example, in aerospace applications, ensuring that components of an airframe are stiff enough can prevent excessive bending or flexing, which can lead to structural failure or performance inefficiencies. Thus, understanding stiffness is fundamental to the engineering and design of structures across various fields, including aerospace, civil, and mechanical engineering.