SUNS DV-TCF Series Electromechanical Tensile-Compression Fatigue Testing System

Overview

The SUNS DV-TCF Series is an electromechanical tensile-compression fatigue testing system engineered for high-precision, long-term durability evaluation of metallic alloys, polymers, composites, elastomers, and automotive components under controlled cyclic loading. Unlike traditional hydraulic servo systems, the DV-TCF employs a digitally controlled AC servo motor actuator—co-developed with Keisoku Giken Co., Ltd. (Japan)—to generate repeatable, low-noise, energy-efficient waveforms including sinusoidal, triangular, rectangular, and optional pseudo-random profiles. Its measurement principle is based on closed-loop force-displacement control using high-resolution load cells (typically ±0.5% FS accuracy) and linear variable differential transformers (LVDTs) or non-contact extensometers for strain monitoring. Designed for ISO 1099, ASTM E466, and ASTM E606 compliance, the system supports both axial tension-compression fatigue and push-pull endurance testing up to 10⁷ cycles, with programmable frequency ranges from 0.01 Hz to 100 Hz depending on load capacity and specimen stiffness.

Key Features

• Electromechanical actuation architecture eliminates hydraulic oil, reducing environmental footprint, maintenance intervals, and operational noise (<65 dB(A) at 1 m)
• Digital motion controller with real-time waveform synthesis and adaptive feedback compensation for phase alignment and harmonic suppression
• Modular load frame design supporting multiple load capacities (5 kN to 250 kN standard configurations), interchangeable grips, and environmental chamber integration
• Integrated overload protection, emergency stop circuitry compliant with ISO 13850, and dual-channel safety interlock monitoring
• Thermal management system for sustained high-frequency operation without servo motor derating
• Compliance with CE marking requirements (EMC Directive 2014/30/EU, Machinery Directive 2006/42/EC)

Sample Compatibility & Compliance

The DV-TCF accommodates standardized test specimens per ISO 37, ISO 527, ASTM D638, ASTM D790, and SAE J2231, including dog-bone tensile bars, cylindrical compression samples, and notched fatigue coupons. Custom fixtures—including wedge-action grips, pneumatic clamps, and high-temperature platens—are available for specialized applications. All firmware and control logic are validated per IEC 61508 SIL 2 for functional safety in industrial lab environments. Test reports generated by the system include full traceability metadata required for GLP and ISO/IEC 17025-accredited laboratories, with audit trails meeting FDA 21 CFR Part 11 electronic record requirements when paired with optional validation packages.

Software & Data Management

Control and analysis are performed via SUNS TestMaster™ v5.x software—a Windows-based platform supporting multi-axis synchronization, real-time FFT spectral analysis, and S-N curve generation with Basquin and Manson-Coffin modeling. The software provides native export to CSV, Excel, and universal MDF4 formats compatible with MATLAB, Python (via ASAM MDF libraries), and third-party statistical tools. Data integrity is ensured through encrypted local storage, user role-based access control (admin/operator/viewer), and configurable automatic backup to network drives or NAS devices. Optional IQ/OQ documentation kits support installation and operational qualification for regulated industries including medical device R&D and aerospace component certification.

Applications

• Fatigue life prediction of engine mounts, suspension bushings, and brake caliper components under road-simulation spectra
• Cyclic compressive resilience testing of battery electrode stacks and thermal interface materials
• High-cycle fatigue characterization of additive-manufactured Ti-6Al-4V and Inconel 718 aerospace alloys
• Low-cycle fatigue (LCF) and thermomechanical fatigue (TMF) studies with integrated furnace modules (–70 °C to +1000 °C)
• Quality assurance of polymer-based medical implants per ISO 14801 and ASTM F2129
• Material development workflows requiring correlation between monotonic tensile data and fatigue threshold (ΔK_th) determination

FAQ

What waveform types does the DV-TCF support natively?
Sinusoidal, triangular, and rectangular waveforms are standard; pseudo-random vibration profiles require optional spectrum synthesis module and external signal conditioning hardware.
Can the system perform combined tension-compression tests with asymmetric amplitude ratios?
Yes—the controller supports independent upper/lower limit definition and mean-load offset adjustment, enabling R-ratio control from –1 (fully reversed) to +0.95.
Is third-party calibration certification included with delivery?
Each system ships with factory calibration certificates traceable to NIM (China National Institute of Metrology); ISO/IEC 17025-accredited field calibration services are available upon request.
Does the software comply with FDA 21 CFR Part 11 for electronic signatures?
Yes—when deployed with configured audit trail logging, electronic signature workflow, and secure user authentication, the TestMaster™ platform meets Part 11 requirements for regulated biotech and pharmaceutical applications.
What is the typical lead time for custom fixture design and integration?
Standard grip sets ship within 2 weeks; bespoke fixture engineering (e.g., torsional-combined loading adapters) requires 6–8 weeks following mechanical drawing approval.