Iinelastiske

Iinelastiske is a Danish-language term used as the plural form of the adjective inelastisk, meaning inelastic. The standard spelling for the plural form is usually inelastiske; the form with a double initial i is not common in Danish orthography. The word describes objects, materials, or processes that do not return to their original shape after deformation.

In physics and engineering, inelasticity refers to behavior where deformation is not fully reversible and some energy is dissipated, often as heat or permanent change. In an elastic material, deformation is reversible and energy can be stored and recovered. Inelastic behavior involves permanent deformation if the stress exceeds the yield strength, and part of the kinetic or mechanical energy is lost rather than recovered. A perfectly inelastic collision is a theoretical case in which colliding bodies stick together after impact, resulting in maximum kinetic-energy loss.

In materials science, the yield point marks the transition from predominantly elastic to predominantly inelastic (plastic) response. Some materials exhibit viscoelastic behavior, showing time-dependent inelastic effects such as creep under sustained load or stress relaxation when held at constant strain. Understanding inelastic properties is important for designing components to avoid permanent damage, ensure safety, and predict long-term performance.

Usage notes: The term is mainly found in Danish technical writing. In English, the corresponding term is typically "inelastic" or "inelasticity." The exact meaning of iinelastiske depends on context but generally denotes plural instances of inelastic characteristics.