Spring and stabiliser bar testing

Spring and stabiliser bar testing

IABG leads in the development and fine-tuning of test procedures for car springs. We develop and operate test benches both for mechanical testing of springs, optionally in corrosive media, and for preconditioning through stone chip simulation and corrosion using salt spray and fog and regulated climates.

IABG spring test benches for spring elements stand out through realistic simulation of deformations and environmental conditions. They are low maintenance and feature short set-up and adjustment times and very low power consumption. IABG is the largest test laboratory in Europe for this type of tests.

We have decades of experience in developing suitable test procedures for statistically backed-up fatigue analyses and in the planning, implementation and statistical evaluation of such tests. Many renowned manufacturers of springs and the majority of German car makers are our customers.

Fatigue strength of axle springs

Relevant influences

  • „Mechanical loading as a result of
    • Spring compression
    • Axle kinematics
  • „Corrosive environmental conditions
  • „Damage to surface and coating caused by
    • Spring seat abrasion
    • Stone impact

Experimental verification

  • „Pre-damage caused by stone impact
  • „Corrosion in alternating cycle tests developed by the German Association of the Automotive Industry (Verband der Automobilindustrie, VDA)
  • „Optional tests with simulated compression kinematics
  • „Tests with original spring seats in installation position
  • „Vibration fatigue tests with fi xed or variable amplitudes
  • „Abrasive wear simulation
  • „Corrosion simulation with intermittent salt-water sprayexposure
  • „Statistical validation with systematic testing and a sufficient number of test items

Benefits of IABG spring test benches

  • „Energy efficiency by utilising the principle of resonance in tests
  • „Reliability and low maintenance
  • „Exclusion of exogenic forces and vibrations
  • „Testing with parallel and circular defl ection
  • „Tests with original spring seats in installation position
  • „Dry and wet fatigue tests
  • „Optional application of abrasive media to spring seat
  • „Software-based testing, documentation and evaluation
  • „Accepted by all leading car manufacturers
  • „Compliant with German OEM standards (AK-LH 07) for springs and stabilizer bars

Fatigue strength of valve springs

Relevant influences

  • „Mechanical loading as a result of compression
  • „Very high number of load cycles
  • „Increased temperature
  • „Dynamic settling

Experimental verification

  • „Tests with maximum stress almost to block length of the spring
  • „Vibration fatigue tests with fi xed amplitudes
  • „Simultaneous testing of a high number of valve springs
  • „Simulation of increased temperature
  • „Statistical validation with systematic testing and a sufficient number of test items
  • „Determination of dynamic settling

Benefits of IABG valve spring test benches

  • „„Energy efficiency by utilising the principle of resonance in tests
  • „„Reliability and low maintenance
  • „„Exclusion of exogenic forces and vibrations
  • „„Simultaneous testing of a large number of springs
  • „„Fatigue tests at various temperatures
  • „„Software-based testing, documentation and evaluation
  • „„Recognised by all leading car manufacturers

Fatigue strength of stabilizer bars

Relevant influences

  • „Mechanical loading as a result of
    • Bar torsion
    • Axle kinematics
  • „Corrosive environmental conditions
  • „Damage to surface and coating caused by
    • Stone impact

Experimental verification

  • „Pre-damage caused by stone impact
  • „Corrosion in alternating cycle tests developed by the German Association of the Automotive Industry (Verband der Automobilindustrie, VDA)
  • „Tests with original stabilizer bars in installation position
  • „Optional tests with simulated compression kinematics on full axle configuration
  • „Vibration fatigue tests with fi xed or variable amplitudes
  • „Statistical validation with systematic testing and a sufficient number of test items

Benefits of IABG stabilizer bar test benches

  • „„Energy efficiency by utilising the principle of resonance in tests
  • „„Reliability and low maintenance
  • „„Exclusion of exogenic forces and vibrations
  • „„Tests with original stabilizer bar bearings and full axle configuration
  • „„Tests for up to 42 mm thick stabilizer bars
  • „„Software-based testing, documentation and evaluation
  • „„Accepted by all leading car manufacturers
  • „„Compliant with German OEM standards (AK-LH 07) for springs and stabilizer bars