Stiffness
In space and astronautical engineering, stiffness refers to the resistance of a structure to deformation under an applied load. It is a critical parameter in the design of spacecraft and their components, as well as in the analysis of their performance. Stiffness is important because it affects the stability, strength, and durability of a structure. A structure that is too flexible may experience excessive deformation or even failure under load, while a structure that is too stiff may be unnecessarily heavy and difficult to manufacture. Stiffness is typically measured in terms of the structure's deflection under a given load, and is expressed as a ratio of the load to the deflection. Engineers use a variety of techniques to increase stiffness, such as adding reinforcement, changing the material properties, or altering the geometry of the structure.
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