Читать книгу The Rheology Handbook - Thomas Mezger - Страница 205

2a. When applying a constant force, only the spring displays an immediate, step-like deformation until it reaches a constant deflection value which is proportional to the value of the loading force. Therefore, immediately after the beginning of the load phase it is only the spring which is deformed.

2b. Afterwards, when still under the acting constant force, also the piston of the dashpot is beginning to move, and it is now continuously moving on as long as the force is applied. After a certain period of time under load, both components are showing a certain extent of deformation which corresponds as well to the degree of the force as well as to the time of loading.

As a result of the load phase, the time-dependent deformation function occurs in a γ(t)-diagram as an immediate deformation step, i. e. a step which is independent of time, followed by a straight line sloping upwards.