National Physical Laboratory

Mechanical testing (static, dynamic, durability)

Mechanical testing 1 Mechanical testing 2 

The NPL Materials Group has considerable experience in the mechanical characterisation of all classes of materials including metals and alloys, ceramics, polymers, adhesives and composites. A range of state of the art laboratories contains an extensive array of test equipment for static, dynamic and durability testing of materials.

  • Static testing
    • Uni-axial (± 500 kN, -150 °C to 350 °C within standard environmental chambers, up to 1000 °C using furnaces)
    • Biaxial testing of polymers
    • Multi-axial (± 50 kN, ± 50 mm stroke)
    • Tension, compression, flexure, shear and fracture toughness measurements
  • Dynamic
    • High rate (± 35 kN, 1 to 2 m/s, -150 °C to 350 °C)
    • Drop weight impact (up to 4 metre drop height, < 900J, -55 °C to 200 °C)
  • Durability
    • Cyclic fatigue
      • Uni-axial (± 100 kN, 0.002 to 50 Hz)
      • Multi-axial (± 50 kN, 0.002 to 25 Hz)
    • Creep
      • Metals and composites (+ 30 kN, 23 °C to 900°C and ± 500 kN, 23 °C
        to 350 °C)
      • Polymers (tensile only, 0 to 750 N, 0 to 100 °C)
    • Slow strain rate testing (liquids and gas exposure, 4.5 x 10-7 m/s)
    • Environmental stress cracking (tension and flexure, all liquids, 0 to 1 kN)
    • Creep rupture (tension and flexure, 0 to 50 kN)
  • Miniaturised testing - ETMT
    • Wide range of tests including high temperature tensile, creep, TMF, CTE, identification of phase change
    • Tests up to 1300 ºC using DC heating
    • Typical specimen size is 40 x 1 x 1 mm
  • Modulus measurement
    • Static measurement to ASTM E111 or dedicated NPL procedures
    • Dynamic measurements using Impulse Excitation Technique (IET) for measuring Young's modulus, shear modulus and Poisson's ratio up to 1000 ºC

Contact

Customer Service tel: +44 20 8943 8681
E-mail: materials_enquiries@npl.co.uk

Last Updated: 25 Mar 2010
Created: 15 May 2009

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