SUNS 890 Patriot Series Electro-Hydraulic Servo Dynamic Fatigue Testing Machine

Overview

The SUNS 890 Patriot Series Electro-Hydraulic Servo Dynamic Fatigue Testing Machine is a high-precision, multi-functional testing system engineered for rigorous mechanical characterization under both static and dynamic loading conditions. Based on the principle of electro-hydraulic servo control, it employs closed-loop feedback from high-fidelity load cells, displacement transducers, and extensometers to deliver precise force, position, and strain regulation across a broad operational envelope. The system integrates a rigid load frame, high-bandwidth MOOG/PARKER servo valves, a low-noise variable-displacement hydraulic power unit, and a DOLI digital control architecture—enabling seamless execution of high-cycle fatigue (HCF), low-cycle fatigue (LCF), combined HCF/LCF, thermomechanical fatigue (TMF), fracture mechanics (K_Ic, J_Ic, da/dN), and quasi-static tensile/compression/bending tests. Designed for laboratories requiring traceable, repeatable, and standards-compliant mechanical data, it serves as a foundational platform for R&D, quality assurance, and regulatory validation in aerospace, defense, nuclear energy, biomedical device development, and advanced materials research.

Key Features

• Patented ultra-quiet hydraulic power unit: noise level ≤55 dB(A) at 1 m under full-load operation (60 L/min @ 21 MPa)
• Triple-patented sealing architecture: guaranteed oil-leak-free operation for 36 months; operating oil temperature maintained below 50 °C even during extended high-frequency cycling
• High-stiffness load frame (2.6 × 10⁸ N/m) with ≥1200 mm test space and 533 mm column spacing—optimized for large components and environmental chamber integration
• DOLI digital control system with full-field PID regulation: supports force, displacement, and strain control modes; real-time data acquisition at 100 kHz; 18-bit resolution signal conditioning
• Dynamic performance: ±100 kN peak force; ±75 mm actuator stroke; frequency range 0–50 Hz; maximum piston velocity 50 mm/s; fatigue cycle capacity up to 2 × 10⁹ cycles
• Modular configuration: compatible with high-temperature furnaces (up to 1200 °C), environmental chambers, hydraulic wedge grips, COD gauges, and custom extensometry solutions

Sample Compatibility & Compliance

The SUNS 890 accommodates metallic alloys (Ti, Ni-superalloys, Al, steel), polymers, elastomers, composites, ceramics, and biomedical implants—both as raw materials and finished components. Its modular design enables direct integration with ASTM E8/E9/E21/E606/E647/E1820/E2368, ISO 6892/12108/12111/12737/783, GB/T 228/4161/6398/21143/3075/15248, and GJB 6213-2008 compliant test setups. All hardware and software modules are engineered to support GLP/GMP-aligned workflows, including audit-trail-enabled user authentication, electronic signatures, and metadata-rich test file generation. Optional FDA 21 CFR Part 11 compliance packages are available for regulated medical device and pharmaceutical applications.

Software & Data Management

DOLI application software provides a unified interface for test definition, execution, real-time monitoring, and post-processing. Preconfigured templates cover ASTM E399 (K_Ic), ASTM E647 (da/dN), ASTM E1820 (J_Ic), ISO 12108, and GB/T 4161 workflows—with automatic parameter derivation (e.g., ΔK, C*, crack length via compliance or DC potential drop). Static modules compute modulus, yield strength (Rp0.2), ultimate tensile strength, elongation, and reduction of area per ISO 6892-1 and GB/T 228.1. Raw data export supports CSV, XML, and universal .tdms formats; report generation includes customizable headers, statistical summaries, curve overlays, and embedded calibration certificates. All software versions undergo version-controlled release management and are validated per IEC 62304 for safety-critical instrumentation software.

Applications

• Fracture Mechanics: Linear-elastic and elastic-plastic fracture toughness (K_Ic, J_Ic), fatigue crack growth rate (da/dN), crack initiation threshold (ΔK_th)
• Fatigue Testing: Spectrum loading, block loading, variable-amplitude cycling, push-pull and torsional fatigue, thermal-mechanical fatigue (TMF) with synchronized furnace control
• Static Mechanical Testing: Tensile, compression, bend, and creep testing per ISO, ASTM, and GB standards—including high-temperature tensile per ISO 783 and GB/T 4338
• Component Validation: Durability assessment of orthopedic implants, shock absorbers, turbine blades, landing gear, and welded joints
• Advanced Materials Development: Characterization of carbon fiber composites (ASTM D3479/D6115), shape-memory alloys, and additively manufactured structures under cyclic thermo-mechanical loads

FAQ

What is the maximum achievable frequency at full ±100 kN load amplitude?
At rated force, the system maintains stable sinusoidal output up to 30 Hz; 50 Hz operation is supported at reduced amplitudes per the published frequency–amplitude envelope.
Does the system support closed-loop strain control using extensometers?
Yes—via optional high-precision axial or clip-on extensometers with analog or digital outputs, fully integrated into DOLI’s real-time PID control loop.
Can the machine be upgraded for thermomechanical fatigue (TMF) testing?
Absolutely—the open test space, reinforced crosshead, and standardized furnace mounting interfaces allow retrofitting with programmable high-temperature furnaces and thermal gradient control modules.
Is third-party calibration certification included with delivery?
Each system ships with NIST-traceable calibration certificates for load cell, displacement transducer, and pressure sensors—valid for 12 months from commissioning.
What level of cybersecurity and data integrity does the DOLI software provide?
Role-based access control, encrypted local database storage, automated backup scheduling, and configurable audit trails meet ISO/IEC 27001-aligned laboratory IT security requirements.