nichtelastische

Nichtelastisch is a German adjective meaning inelastic. In physics, it describes a collision where kinetic energy is not conserved. During a nichtelastische collision, some of the initial kinetic energy is transformed into other forms of energy, such as heat, sound, or deformation of the colliding objects. A perfectly nichtelastische collision is one where the colliding objects stick together after the impact. In contrast, an elastische collision conserves kinetic energy.

The concept of nichtelastische interactions is important in various fields of physics, including mechanics, particle physics, and astrophysics. For instance, when a bullet strikes a block of wood and embeds itself, this is an example of a perfectly nichtelastische collision. The energy is used to deform the wood and the bullet, and to create sound and heat. In macroscopic systems, many collisions are approximated as nichtelastische.

In solid mechanics, nichtelastische behavior refers to the deformation of a material beyond its elastic limit. When a material is subjected to stress, it may deform elastically, meaning it will return to its original shape when the stress is removed. However, if the stress exceeds a certain threshold, known as the elastic limit, the material will undergo nichtelastische deformation, and some permanent deformation will remain even after the stress is released. This is often referred to as plastic deformation.