What Causes Hysteresis When Stretching Or Relaxing A Material? (Solution)

What does the term elastic hysteresis mean?

• Elastic hysteresis | Reference Notes | Grade 11 Science Notes Certain elastic material follow one curve (path) on stretching when the stress is increased and follows another path while regaining its original configuration. During regaining its original this particular behavior of the elastic material is called elastic hysteresis.

What causes elastic hysteresis?

The elastic hysteresis is caused due to the difference between the strain energy required to generate the given stress in the material to the material’s elastic energy at the given stress.

What is hysteresis stress strain?

Elastic Hysteresis is the difference between the strain energy required to generate a given stress in a material, and the material’s elastic energy at that stress. This energy is dissipated as internal friction (heat) in a material during one cycle of testing (loading and unloading).

What is muscle hysteresis?

The hysteresis observed in the experiments is of two forms. Without any relaxation at the end of lengthening or shortening, the hysteresis loop is a convex clockwise loop, whereas a concave clockwise hysteresis loop (labeled as kiss-and-go) is formed when the muscle is relaxed at the end of lengthening and shortening.

What is material relaxation?

In materials science, stress relaxation is the observed decrease in stress in response to strain generated in the structure. This is primarily due to keeping the structure in a strained condition for some finite interval of time and hence causing some amount of plastic strain.

What is hysteresis phenomenon?

The phenomenon of hysteresis in ferromagnetic materials is the result of two effects: rotation of magnetization and changes in size or number of magnetic domains. In general, the magnetization varies (in direction but not magnitude) across a magnet, but in sufficiently small magnets, it does not.

What is hysteresis effect?

The magnetization of ferromagnetic substances due to a varying magnetic field lags behind the field. This effect is called hysteresis, and the term is used to describe any system in whose response depends not only on its current state, but also upon its past history.

What causes magnetic hysteresis in ferromagnetic materials?

The phenomenon of hysteresis in ferromagnetic materials is the result of two effects: rotation of magnetization and changes in size or number of magnetic domains. In general, the magnetization varies (in direction but not magnitude) across a magnet, but in sufficiently small magnets, it doesn’t.

What is hysteresis explain with diagram?

A hysteresis loop (also known as a hysteresis curve) is a four-quadrant graph that shows the relationship between the induced magnetic flux density B and the magnetizing force H. It is often referred to as the B-H loop. From hysteresis loops, we can determine a number of magnetic properties about a material.

What is hysteresis biomechanics?

Hysteresis or energy dissipation The difference between the two curves represents the amount of energy that is lost during loading. If loading and unloading are repeated several times, different curves can be obtained.

What is hysteresis in tendons?

ELASTIC HYSTERESIS IS A PROPERTY of tendon and describes the. energy dissipated due to material viscosity. The amount of tendon hysteresis is important for efficiency of locomotion. Higher hysteresis is associated with greater energy dissipation as heat, and thus less energy can be recoiled to propel our movements.

What is tissue creep?

Creep is the capacity of fascia and other tissue to lengthen when subjected to a constant tension load resulting in less resistance to a second load application. A progressive deformation occurs over time.

What causes stress relaxation in polymers?

Viscous flow is caused by (linear) polymer chains moving past one another. Chain scission is often caused by oxidation and hydrolysis and relaxation by breaks in load bearing chains.

What is stress relaxation in metals?

Stress relaxation is the time dependent decrease of the stress in a metal under constant strain, such as in a beam with fixed deflection. (The metallurgical processes are similar to those that cause the related phenomenon called creep, where the metal changes geometry over time under a constant stress.)

When a material undergoes relaxation What happens to the stress and strain?

Stress relaxation is a decreased tendency for the material to return to its original shape when unloaded. Figure 4 shows the stress-strain curve for a material undergoing stress relaxation. Over time, the stress and force decrease, while the strain remains constant.