Quasi-static Test Methods
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Quasi-static Test Methods
Classification in the mechanical test methods
In the quasi-static test methods, the stress is applied slowly, shock-free and steadily increasing until the test specimen used breaks.
The strain rates used are in the range of approx. 10-5 to 10-1 s-1, whereby the fracture of the test specimen or a defined limit of stress should be reached in an economically reasonable period of time. The material testing machines used in such tests must therefore guarantee a constant crosshead speed in the case of the preferred conventional test methods, irrespective of the load level and the test speed. Under these formal conditions, the quasi-static test methods, such as the tensile test or the bending test, are mainly used to determine material characteristic values or material characteristic functions, for quality assurance, damage analysis and preselection of plastics for defined applications as well as for solving simple design tasks (see: component testing).
See also
- Test speed
- Crosshead speed
- Component testing
- Fracture behaviour of plastics components
- Strain rate basics
- Fracture mechanical testing
References
- Grellmann, W., Seidler, S. (Eds.): Kunststoffprüfung. Carl Hanser Munich (2025) 4. Edition, pp. 106–112 (ISBN 978-3-446-44718-9; E-Book: ISBN 978-3-446-48105-3; see AMK-Library under A 23)
- Bierögel, C., Grellmann, W.: Quasi-Static Tensile Test. In: Grellmann, W., Sabine Seidler (Eds.): Mechanical and Thermomechanical Properties of Polymers. Landolt Börnstein. Volume VIII/6A3, Springer Berlin (2014), pp. 76–143 (ISBN 978-3.642-55165-9); see AMK-Library under A 16), DOI: 10.1007/978-3-642-55166-6_15
- Dripke, M., Michalzik, G., Bloching, H., Fahrenholz, H.: Mechanische Prüfverfahren und Kenngrößen – kompakt und verständlich. Band 1: Der Zugversuch bei quasistatischer Beanspruchung. Castell Verlag GmbH, Wuppertal (2002) (ISBN 3-934255-50-7; see AMK-Library under C 14)