3-point /4-point flexural test fixture GZ B-50

The reversed loading flexural test fixture allows for the quasi-static and cyclic characterisation of the flexural properties of fibre-reinforced plastic materials for both 3-point and 4-point bending tests. The test fixture is suitable for testing a wide range of fibre-reinforced plastics with short, long and continuous fibres with thermoplastic or thermosetting matrices and unidirectional layers or multi-layer laminates (sandwich laminates).

Features & Benefits

  • Design allows high loads up to 50 kN in static and dynamic loading
  • Quick and easy changeover between 3-point and 4-point configuration
  • High number of cycles with low maintenance possible thanks to needle roller bearings placed in each support frame
  • No lateral movement of specimen during dynamic testing due to vertical and axial constrains
  • Test fixture can be used to conduct S/N curves under fully reversed loading (R = -1) and many more
  • Stainless steel design of all components for use in climate chambers (-60…+150 °C)


  • Fixed support fin with different radii
  • Bearing fin supported with different radii
  • Adapter for connection to all common electromechanical and servo-hydraulic universal testing machines


  • DIN EN ISO 14125:1998-06, “Fibre-reinforced plastic composites – Determination of flexural properties”, DIN, 1998
  • DIN EN ISO 178:2003-06, “Plastics – Determination of flexural properties”, DIN, 2001
  • DIN EN 2562:1997-05, “Aerospace series – Carbon fibre reinforced plastics – Unidirectional laminates; flexural test parallel to the fibre direction”, DIN, 1997
  • DIN EN 2746:1998-10, “Aerospace series – Glass fibre reinforced plastics – Flexural test, three point bend method”, DIN, 1998
  • ASTM D 790-10, “Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials”, ASTM, 2010
  • ASTM D 7264-07, “Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials”, ASTM, 2007
  • ASTM D 7774-12, “Standard Test Method for Flexural Fatigue Properties of Plastics”, ASTM, 2017

Further Information