Torsjonsfjære

Torsjonsfjære, also known as a torsion spring, is a type of mechanical spring that stores energy by twisting. It is commonly used in various applications where rotational motion is required. The spring consists of a cylindrical rod or wire that is twisted around its axis, creating a helical shape. The amount of torque required to twist the spring is proportional to the angle of twist, following Hooke's Law for rotational systems.

Torsion springs are characterized by their stiffness, which is determined by the material properties of the spring, its geometry, and the amount of twist. The stiffness can be calculated using the formula k = G * J / L, where G is the shear modulus of the material, J is the polar moment of inertia, and L is the length of the spring. The energy stored in a torsion spring can be calculated using the formula E = 1/2 * k * θ^2, where θ is the angle of twist.

Torsion springs are widely used in various applications, including door hinges, suspension systems in vehicles, and mechanical watches. They are preferred for their ability to provide a smooth and controlled rotational motion. However, they can also be prone to failure if overloaded or subjected to excessive vibration, which can lead to fatigue and eventual fracture.

In summary, a torsjonsfjære is a type of mechanical spring that stores energy through twisting. It is characterized by its stiffness and the energy it can store, and it is used in various applications where rotational motion is required.