ISO 15630-3, ASTM A416 Steel strand fatigue dynamic testing machine, high-cycle fatigue test 

Fatigue testing equipment is often used to determine how a material will perform over time and repeated use.

United Test offer the 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 electro-hydraulic servo static and dynamic universal testing machine is widely used for the mechanical performance testing of materials and components, including tensile, compression, low-cycle, and high-cycle fatigue tests. With the configuration of high and low-temperature chambers, it can conduct mechanical tests at high and low temperatures.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 industry etc.,

Main Function:
1, Fatigue working life study;
2, Cracking extension and breaking load study;
3, Tensile, compression, bending cyclic test;
4, Components and parts fatigue and life working test.

Actuator:The servo linear actuator is the core component of the testing machine, and the testing machine outputs test forces through the actuator. It is designed and manufactured using proprietary technology, with the actuator embedded in the lower part of the host machine, comprising the actuator body, hydraulic control module, and sensors.

2.1 The actuator uses our company's servo linear actuator, designed based on the principle of a symmetric four-way servo valve controlling a symmetric actuator. The actuator is designed and manufactured with a modular, standardized development concept, utilizing a multi-stage flexible support combination guiding mechanism, characterized by low damping, high responsiveness, long lifespan, and large clearance design. The startup pressure is less than 0.05 MPa, and there is no crawling phenomenon.

2.2 The piston seal of the actuator adopts a Glide ring guide and seal method, while the piston rod seal uses a Star seal guide and dust seal method. All sealing components are imported high-speed sealing elements specifically for servo actuators from Germany's Busak Shamban. The support of the piston rod of the servo linear actuator breaks from traditional design, using non-metal support, large clearance design, and high lateral force resistance, featuring high speed and non-sintering self-lubrication. The assembly achieves no oil leakage with combined seals for high-pressure sealing, low-pressure sealing, and leakage through clearance pipes. The combined sealing structure has good interchangeability, facilitating maintenance. It exhibits high speed, non-sintering, and self-lubricating characteristics. The above sealing methods effectively reduce the internal frictional resistance of the actuator, improving the testing accuracy of the machine and the lifespan of the actuator. The frequency response of the servo linear actuator is not less than 100 Hz.

ASTM A1061/A1061M-20ae1 

Standard Test Methods for Testing Multi-Wire Steel Prestressing Strand

ASTM A416/A416M-18 

Standard Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete

ISO 15630-3

Steel for the reinforcement and prestressing of concrete — Test methods

Part 3: Prestressing steel