Overview

Dynamic fatigue testing machines are mainly used to test the dynamic and static mechanical properties of various metals, non-metallic materials, components, elastic bodies, rubber elastomers and shock absorbers. Tensile, compression, bending, low-cycle and high-cycle fatigue, crack propagation and fracture mechanics tests can be carried out under sine wave, triangular wave, square wave, trapezoidal wave, ramp wave and user-defined waveforms. Equipped with high-temperature furnace, low-temperature chamber, corrosion tank and other environmental chambers as required, it can complete mechanical property tests of materials under different environmental conditions. It is applied in quality control and experimental research in aerospace, ship engineering, ground vehicles, rail transit, building components, auto parts and other fields.

A dynamic fatigue testing machine generally consists of a main frame, servo oil source, servo controller, computer, test fixtures and pipeline assembly. It is used to test materials, parts, components or assemblies under long-term cyclic loading.

Machine Features

• Frame-type main structure. The worktable, uprights and crossbeam form a closed loading space with high structural rigidity.

• Symmetrical frame structure. The loading axis is coaxial with the machine axis for rational force distribution.

• The base and crossbeam are manufactured by gantry machining. Uprights and crossbeams adopt assembled connection to ensure high coaxiality of the frame and uniform force bearing.

• The moving crossbeam is driven by hydraulic locking and hydraulic lifting. It is safe and reliable, and the test space can be adjusted flexibly.

• Multiple machine specifications: 5kN ~ 10000kN are available.

• The actuator is integrated with the main frame, available in top-mounted and bottom-mounted structures.

• The actuator adopts double-rod double-action design for excellent fatigue-resistant structure.

• The actuator is built with displacement sensors, load sensors and electro-hydraulic servo valves.

• The actuator stroke is equipped with a hydraulic buffer to effectively reduce impact pressure.

• A full range of test fixtures are available: hydraulic wedge clamps, threaded fixtures, compression fixtures, bending fixtures, etc.

• Multiple standard oil sources are optional: 10L/min ~ 1000L/min.

• Full digital servo controller with powerful and reliable performance. It supports test parameter setting, safety setting module, custom test functions and automatic test report generation.

• Adhering to the company’s safety, stability and environmental protection design concept, the equipment achieves better safety, stability and energy-saving performance.

Main Functions

• High-cycle and low-cycle fatigue tests

• Dynamic fatigue life tests

• Fatigue crack propagation tests

• Partial vibration and impact tests

• Partial dynamic parameter detection tests

• Unidirectional pulsating loading tests

• Static mechanical tests under constant rate, constant strain and constant stress control

• Fracture toughness performance tests

• Flexible expansion function to simulate the force spectrum of components

Applicable Machine Types

•  Embedded channel fatigue performance testing machine

•  Spring fatigue testing machine

•  High & low temperature electro-hydraulic servo dynamic and static universal testing machine

•  Rail plate dynamic-static load testing machine

•  Biomechanical fatigue testing machine

•  Cantilever bending fatigue testing machine

•  Pedal travel testing machine

•  Wire fatigue test bench

•  Bearing fatigue life testing machine

•  Shock absorber fatigue testing machine

•  Base plate stiffness testing machine

•  Rubber fatigue testing machine

•  Rear axle fatigue testing machine

•  Outer ball joint durability test bench

•  High-frequency fatigue testing machine

Applicable Standards

GB/T2611-2007 General Technical Requirements for Testing Machines 

GB/T16826-2008 Electro-hydraulic Servo Testing Machines 

JB/T9397-2002 Technical Conditions for Tensile and Compression Fatigue Testing Machines 

GB/T3159-2008 Hydraulic Testing Machines 

GB/T26077-2010 Metallic materials — Fatigue testing — Axial force-controlled method 

JJG 556-2011 Axial Force Fatigue Testing Machines 

GB/T50082-2009 Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete 

GB/T5224-2003 Steel Strand for Prestressed Concrete 

JGJ107-2010 Technical Specification for Mechanical Connection of Steel Bars 

QC/T545-1999 Bench Test Method for Shock Absorbers of Automobiles 

ASTM D3479 Tensile Fatigue of Polymer Matrix Composite Materials 

ASTM D7165 Test Method for Open-Hole Fatigue of Composite Materials 

GB/T 3075 Metallic materials — Axial force fatigue testing 

HB5287 Test Method for Axial Loading Fatigue of Metallic Materials 

GB/T 15248-2008 Metallic materials — Axial constant amplitude low-cycle fatigue testing 

GB/T 6398-2000 Metallic materials — Fatigue crack growth rate testing 

GB/T 4161-2008 Metallic materials — Determination of plane strain fracture toughness KIC 

GB/T 21143 Metallic materials — Determination of quasi-static fracture toughness 

ASTM 1290 Standard Test Method for Crack-Tip Opening Displacement (CTOD) Fracture Toughness Measurement 

ASTM E399 Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness KIC of Metallic Materials

Technical Parameters