Viskoelisissä

Viskoelisissä is a Finnish term found mainly in materials science literature and denotes the group of viscoelastic substances. A viscoelastic material combines features of both a viscous fluid and an elastic solid: when a rapid load is applied it behaves like a solid, but under prolonged stress it flows like a liquid. The word is typically used in the plural, locative case, meaning “in viscoelastics” or “within viscoelastic materials.”

Typical examples of viskoelisissä include natural rubber, silicone elastomers, polyurethanes, and various biopolymers such as gelatin and alginate. These materials are characterised by their time‑dependent strain response and their ability to dissipate mechanical energy. Because of this, viskoelisissä are employed in applications that require vibration damping, shock absorption, or flexible sealing—common examples include automotive suspension bushings, footwear midsoles, and biomedical devices such as soft tissue implants.

In the field of polymer physics, viskoelisissä exhibit a spectrum of relaxation times that can be described through models such as Maxwell, Kelvin–Voigt, and standard linear solid. Experimental characterisation often uses dynamic mechanical analysis, where storage modulus and loss modulus reveal the balance between elastic and viscous behaviour across frequencies.

Finnish industrial standards, for instance NEN‑ISO 37 and its Scandinavian counterparts, provide classification schemes that include viscoelastic categories. Manufacturers of engineered polymers often certify their products according to these standards, ensuring consistent performance in environments that demand both resilience and adaptability. The study of viskoelisissä remains a dynamic research area, especially as advanced composites and 4‑D‑printing technologies integrate programmable viscoelastic components into next‑generation devices.