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Testing of Fasteners

Fasteners such as hooks and eyelets, as well as bolts and rivets are used to join components and metal sheets and sections that must not separate under load. Fastener technology in general, particularly welding and associated technologies, also belong to this group. Relevant standards are DIN EN ISO 9015-1 and -2, as well as DIN EN ISO 14271 and DIN ISO 22826. 

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Shear tests on fasteners

In addition to single-axis tensile loading, shear loads also occur in fasteners in service and can quickly cause a joint to part. Shear tests on joined parts or specimens are therefore essential, particularly where riveted joints are involved. Accurate load application is essential to prevent other forces arising in addition to the shear force and distorting results. ZwickRoell works with you to develop a specification for the correct gripping of the specimen or component and then produces the required arrangement. These test devices can be simple or very complex, but always do exactly what is required of them.

Fatigue tests on connection elements

In addition to static loads, fasteners in general are subjected to frequent cyclic loading,including vibrations. The magnetic drive, which generates controlled resonance in the system, including the specimen, requires minimal power during this test, resulting in highly cost-effective testing.

In what are referred to as "H" specimens, the individual joints are subjected to common cyclic loading in tension and compression and the fasteners to a shear effect.H specimen holders designed for this test initially distribute the forces over the entire structure. The bending and resultant loosening of the structure can be measured with an extensometer.

Additional tests for fasteners

  • Flexure and compression tests
  • Torsion tests
  • Hardness testing
  • Creep tests
  • Drop weight tests

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