Load Framework

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Load framework

Load frames for materials testing machines are available in various constructive designs. Depending on the type of installation, a distinction is made between standing and horizontal testing machines. Standing testing machines are available in table-top and standard designs (see illustration). Depending on the nominal load of the testing machine and the required rigidity (see: machine compliance), there are one, two and four-column versions of the load frame. The load frames can be built as extra-high systems, e.g. for textile testing and when adapting a temperature chamber, or as extra-wide machines, e.g. for part and component testing.

Fig.:

Materials testing machines as table-top model with 0.5 to 20 kN load frame (right) and floor model (left) (factory photos of Zwick company Z020)

A modern load frame design is realised, for example, at ZwickRoell company with a patented flexurally rigid hollow chamber profile with guide cylinder, whereby great flexibility is achieved when using lightweight construction. For polymer testing and the mechanical characterisation of composite materials (GFRP and CFRP), materials testing machines with nominal loads of 200 kN are usually sufficiently dimensioned. Larger universal testing machines in the MN range must be decoupled from the building foundation in order to absorb the elastic impact without loss when test specimens break.

See also

• Material testing machine
• Machine compliance
• Material parameter
• Polymer diagnostic

References

• 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), pp. 56–57 (ISBN 3-934255-50-7; see AMK-Library under C 14)