Biaxial Life Cycle

Using hydraulics, cycle the shock absorber at the standard orientation while applying another axial force perpendicular to the shock tube. The side load can be constant or variable depending on the requirements.

Clevis Bracket To Cylinder Durability

Test the shock absorber vehicle mounts and grommets by clamping the shock tube and applying a cyclic load to the test sample. Any load (up to 3,300 lbs.) and orientation can be achieved based on customer requirements.

Damping force characteristics

Using hydraulics, measure the internal forces of a shock absorber in motion. Load, displacement, and velocity measurements are recorded to create hysteresis curves to accurately display the affects frequency, displacement, and temperature have on a shock absorber. Test samples can be soaked at temperature and humidity prior to cycling, or the test can be performed in an environmental chamber.

Dust Durability

Apply any SAE dust to a shock absorber in the required amounts at the desired location. Monitor the durability of the valve while cycling to insure no dust is penetrating the seal. This test can be performed at temperature to intensify the tests harshness.

Extreme Temperature

Cycle a shock absorber in an environmental chamber capable of temperatures from –73°C to 177°C with humidity up to 95% RH. Twin 25 HP compressors allow for extremely fast ramp rates.

Friction

Using hydraulics or robotics apply a force to a shock absorber while monitoring the load. Side loads can be applied or the test can be performed at temperature for various real life situations. Load vs. Time plots can be recorded at any compression or rebound rates.

Gas Repulsion

Using robotics, apply a force to a shock absorber at an extremely slow rate while monitoring the load. Load vs. Time plots can be recorded at any compression or rebound rates.

High And Low Speed Cycle

Vary the speed at which a shock absorber is being cycled through random vibration or changing sine profile.

High Speed Impact

Using hydraulics, apply a sudden impact force to compress the shock absorber and achieve the desired acceleration (measured with calibrated accelerometers).

High Speed Piston Endurance

Vibrate the shock absorber and frequencies up to 200 Hz using hydraulics. Vibration can be sine or random. Thermal cycling is available to prevent over-heating of the test sample.

High Speed Valve Durability

Vibrate the shock absorber and frequencies up to 200 Hz using hydraulics. Vibration can be sine or random. Thermal cycling is available to prevent over-heating of the test sample.

Impact Drop

After rigidly mounting the shock absorber to a test fixture drop or swing the desired impact device to create the required impact load. Custom test fixtures will be developed by Advanced Testing and Engineering, Inc. to suit customer requirements.

Mounting Pin Static / Dynamic Load

After rigidly mounting the shock absorber to a test fixture drop or swing the desired impact device to create the required impact load. Custom test fixtures will be developed by Advanced Testing and Engineering, Inc. to suit customer requirements.

Muddy Water Endurance

Vibrate the shock absorber and frequencies up to 200 Hz using hydraulics while applying a muddy water solution to the seal area. Vibration can be sine or random. Thermal cycling is available to prevent over-heating of the test sample.

Oil Seal Durability

Vibrate the shock absorber and frequencies up to 200 Hz using hydraulics while monitoring the leak rate of the oil or gas. Loss rates are based on weight measurements recorded throughout the test. Vibration can be sine or random. Thermal cycling is available to prevent over-heating of the test sample.

Piston Rod Bending Fatigue

After clamping down the shock absorber tube, apply a static or dynamic load on the shock absorber rod to create the required moment. Displacement measurements are available as required.

Rebound Bumper Durability

With the shock absorber rod either fully in or out apply a linear load to the piston against the end cap of the test sample. Any frequency within the equipments capability can be used to verify the durability of the rebound bumper. Load can be controlled and monitored throughout each test. This test can be performed at temperature.

Static Bending Strength

With the shock absorber rigidly attached to a test fixture, a static load up to 3,300 lbs. can be applied anywhere on the sample to achieve the required moment.

Stem Mount Static Strength

Using hydraulics, apply a load up to 3,300 lbs. to the stem of the shock absorber to test the thread strength, weld strength, or any other process used to attach the stem.