Information on the most widely used ASTM standards within the materials testing industry
Model: HDS, tension, compression fatigue test
Shock absorber fatigue testing machine is a specialized device used to test the performance of shock absorbers and assess their fatigue life. It simulates vibrations and impact loads under actual working conditions to evaluate the durability and reliability of shock absorbers.
Its core functions include:
• Performance testing: measuring parameters such as damping force and stiffness of the shock absorber;
• Life assessment: simulating performance degradation after long-term use through high-frequency cyclic loading;
• Working condition simulation: supports customized testing with different frequencies (e.g., 0.5-50Hz) and amplitudes (up to ±100mm).
General introduction
Shock absorber fatigue testing machine is a specialized device used to test the performance of shock absorbers and assess their fatigue life. It simulates vibrations and impact loads under actual working conditions to evaluate the durability and reliability of shock absorbers.
Its core functions include:
• Performance testing: measuring parameters such as damping force and stiffness of the shock absorber;
• Life assessment: simulating performance degradation after long-term use through high-frequency cyclic loading;
• Working condition simulation: supports customized testing with different frequencies (e.g., 0.5-50Hz) and amplitudes (up to ±100mm).
Its main function is to simulate the load conditions that a shock absorber might encounter in actual use, and to test the service life and performance of the shock absorber. This equipment can carry out high-frequency, long-duration load tests on shock absorbers, thereby evaluating their durability and reliability. In this way, shock absorber manufacturers can gain a comprehensive understanding of their products’ performance and make improvements before launching them on the market, ensuring product quality and enhancing brand reputation.

Key Features
Electro-hydraulic servo static & dynamic universal testing machine is specialized testing equipment, according various industry application to design and configure machine’s structure and components.
The system adopt latest technology, with the unitized design, modulation, standardization idea during design and development process, according customer test requirement, choose the suitable servo controller, servo valve, hydraulic system key parts, not only ensure the testing machine stability and reliability, with feature of easy using, high accuracy and long working life, also improve the cost performance for customer.
This machine mainly used at a variety of material and components, parts for both dynamic and static mechanical property testing, include tension, compression, low cycling test, match with high-low temperature chamber can execute the temperature test. If add versatile test fixture and software, can check the material cracking growth, fracture load etc., mechanical test. Widely used at aerospace, navy, military, scientific research institution, enterprise new product development, inspection etc., industry.
Lifting cylinder is used to control the beam lift, lift no-level speed, with the locking cylinder automatically with the lock, control the cross-beam movement, the lock cylinder automatic release, the beam in place, the lock cylinder automatic locking, (all electrical linkage control), during the experiment, the locking cylinder always work (with pressure) .
1.2, With high stiffness and strength crosshead.
1.3, Crosshead moving, cylinder lock etc., sealing components adopts imported brand part, ensure the reliability and excellence performance.
1.4, Column surface is processed by electroplating hard chromium, improve the anti-corrosion ability and appearance.
1.5, Crosshead lift driving module adopts high quality integrated hydraulic components; console structure is designed according theory of man-machine engineering, convenient for operator using.
1.6, Servo liner actuator rigid connect with working table, built-in non-contact high capacity LVDT displacement sensor, external installed good performance servo valve, flow rate 58L/min under pressure 7Mpa. Load cell is USA Vishay Celtron brand.
1.7, Accuracy less than 5u precision filter, with pulse disappear, accumulation function relay filtration stabilivolt module.
1.8, Blocking, standardization, modular design servo liner actuator with low damping, high response, long working life and large gap feature, design idea is same like MTS company. Actuator sealing components all use imported servo high speed part. Piston rod of actuator adopts non-metal support, large gap design, with feature of high speed working automatic lubrication to avoid sintering.
1.9, Servo linter actuator amplitude limitation position has hydraulic relief area, avoid any damage if operation lose control.
1.10, Servo liner actuator frequency less than 50Hz.
ISO Standards
ISO 6312:2010: Performance requirements and test methods for road vehicle shock absorbers.
ISO 11443:2018: Vehicle suspension vibration test methods.
ISO 1099: Axial fatigue testing of metallic materials (equivalent to DIN 50100, ASTM E466-15, etc.)
ASTM Standards
ASTM E466-15: Standard practice for axial fatigue tests of metallic materials under controlled force amplitude.
ASTM D3479: Standard test method for fatigue testing of composite materials.
Other Standards
SAE J2521:2010: Durability test procedure for shock absorber systems.
GB/T 29238-2012: Durability test methods for automotive shock absorbers in China.
UnitedTest Shock absorber fatigue testing machine is a single station operation, the whole is a vertical two-post structure, by the seat, upper beam and lifting mechanism, damping force detection system, drive mechanism, shock absorber cylinder barrel pressure mechanism, demonstration and fatigue tooling, hydraulic system, collection card, computer, industrial control software and electronic control system, quick plug connector and so on.
Working principle and control diagram like below:

1, Automotive/Motorcycle Industry: Testing the durability of shock absorbers on rough roads to ensure driving comfort;
2, Scientific Research: Used for studying the fatigue characteristics of new materials (such as rubber and metal);
3, Quality Control: Randomly inspecting the performance consistency of shock absorbers during production.
Fatigue Testing Items for Shock Absorber Test Machine:
1. Durability Performance Test: By continuously applying pressure and tension to the shock absorber, this test simulates the damping effect of a vehicle under different road conditions, assessing the durability and service life of the shock absorber. This test not only helps understand the performance of the shock absorber but also predicts its durability in actual use.
2. Load Capacity Test: By subjecting the shock absorber to continuously increasing loads, this test evaluates its load-bearing capacity under extreme conditions. This helps manufacturers design stronger and more durable shock absorber products.
3. Environmental Adaptability Test: By conducting tests under extreme environmental conditions, such as high and low temperatures and humidity, this test evaluates the shock absorber’s performance and stability in various harsh environments.
Main technical specification
1, Max. static test load: ±100kN, full range stepless, 2%~100% range, accuracy ±1%.
2, Max. dynamic test load: ±80kN, fluctuation less than±2%FS.
3, Actuator stroke: ±75mm, indication accuracy ±1%.
4, Frequency range: 0.01—50Hz.
5, Flow rate: 36L/min.
6, Controller type: Single channel; displacement and load close-loop dual channels.
7, Main test waveform: Sine wave, triangular wave, rectangle wave, oblique wave etc.,;
8, Test space: Height 600mm, width 650mm (Customized)
9, Frame stiffness: 5.3×107 N/mm.
10, Frame dimensions: 1150*950*2250mm
11, Hydraulic unit dimensions: 1400*950*1050mm
11, Weight of frame: 1050Kg.
12, Oil source weight: 650Kg.
Main accessories (Standard delivery with machine)
| Item | Name | Qty | Remark |
| 1 | Frame (include actuator) | 1 set | |
| 2 | Servo valve | 1 set | 609 servo valve |
| 3 | Load cell (USA Vishay Celtron 100KN) | 1 set | |
| 4 | Displacement sensor (LVDT) | 1 set | |
| 5 | Hydraulic power system (include below:)) | ||
| 6 | Motor (WanNan) | 1 set | |
| 7 | Pump (Japan Nachi) | 1 set | |
| 8 | Hydraulic oil Connector etc., | 1 set | |
| 9 | Electrical parts, replay, AC connector etc., | ||
| 10 | Sample Alignment Device | 1 set | |
| 11 | Servo control system controller | 1 set | |
| 12 | Computer (HP English Win10) | 1 set | |
| 13 | Fluid part connector all taper sealing | 1 set | |
| 14 | Hydraulic clamping body (tensile grip) | 1 set | |
| 15 | Jaws for chain | 2 set | |
| 16 | Accessories | 1 set | |
| 17 | Consumable parts | 1 set | |
| 18 | Operation manual | 1 pc | |
| 19 | Control software manual | 1 pc | |
| 20 | Quality certificate | 1 pc | |
| 21 | Packing list | 1 pc | |
| 22 | External cooling device (Optional) | ||
| 23 | Other test fixture (optional) |
Application of Shock Absorber Fatigue Testing Machine in Product Design
The shock absorber fatigue testing machine plays a significant role in the automotive parts manufacturing industry.
Manufacturers can use this equipment to conduct comprehensive performance tests on shock absorbers, thereby improving product design and enhancing product quality. Before products are released to the market, the shock absorber fatigue testing machine can help manufacturers identify and address potential performance issues, reducing the risk of product failures in actual use.
At the same time, the shock absorber fatigue testing machine can provide detailed data support for R&D personnel to further optimize product design and improve the performance of shock absorbers. This is of great significance for manufacturers, as it can not only enhance the market competitiveness of their products but also provide consumers with safer and more reliable automotive parts.
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