ILSS Test Fixture GZ IL-10

The short beam shear test for the determination of apparent interlaminar shear strength (ILSS) is a modified 3-point bending test. The span length of the fixture is small as compared to the specimen’s thickness which induces shear stress to the specimen. The geometry of the specimen is a short beam of thermoplastics or thermosettings continuously reinforced by fibres in 0° or 0°/90°-direction. The standard defines apparent interlaminar shear strength as “maximum shear stress calculated at half thickness of specimen at the moment of first failure.”


  • Compact design allows testing forces up to 10 kN
  • Exchangable test fixture modules for quick and easy adaption of the testing device to various testing standards
  • Precise alignment of the specimen due to lateral guiding and adjustment gauge
  • Stainless steel design of all components for use in climate chambers (-60…+150 °C)
  • Adapter to all standard electromechanical and servohydraulic testing machines



  • DIN EN ISO 14130, “Fibre reinforced plastic composites – Determination of apparent interlaminar shear strength by short beam-method“ DIN, 1997
  • DIN EN 2377, “Aerospace series; glass fibre reinforced plastics; test method; determination of apparent interlaminar shear strength“, DIN, 1989
  • DIN EN 2563, “Aerospace series – Carbon fibre reinforced plastics – Unidirectional laminates; determination of apparent interlaminar shear strength“, DIN, 1997
  • ASTM D2344, “Standard Test Method for Short-Beam Strength of Polymer Matrix Composite Materials and Their Laminates”, ASTM, 2016