SUNS WAW-D Series Electro-Hydraulic Servo Universal Testing Machine with Q-Type and G-Type Grips

Overview

The SUNS WAW-D Series Electro-Hydraulic Servo Universal Testing Machine is a high-stiffness, single-space, load-frame system engineered for precision mechanical property evaluation of metallic and non-metallic materials under quasi-static loading conditions. It operates on the principle of closed-loop electro-hydraulic servo control, where a high-response servo valve regulates hydraulic flow to drive an upper-mounted actuator cylinder, enabling accurate force and displacement control in tension, compression, bending, and shear modes. Designed for compliance with international mechanical testing standards—including ASTM E4, ASTM E8/E8M, ISO 6892-1, ISO 7500-1, GB/T 228.1–2022, DIN 50145, and JIS Z 2241—the WAW-D series delivers traceable, repeatable, and metrologically robust test data suitable for R&D laboratories, quality control departments, and third-party certification bodies operating under GLP or ISO/IEC 17025 frameworks.

Key Features

• Single-space structural configuration with top-mounted hydraulic actuator—eliminates spatial reconfiguration between test modes and ensures consistent alignment across all load applications.
• Full-rigidity, gap-free frame architecture minimizes parasitic deformation during high-load testing (up to 600 kN), preserving measurement integrity during abrupt fracture events and reducing floor-transmitted vibration.
• High coaxiality design (<0.15 mm deviation over full stroke) ensures axial loading without moment-induced error, critical for accurate stress–strain curve derivation and modulus calculation.
• Extractable optical encoder with hardened glass scale provides displacement resolution of ≤1 µm and long-term stability against mechanical shock and thermal drift.
• Modular grip interface supports rapid interchange of standardized fixtures—including Q-type wedge-action grips for general-purpose tensile specimens and G-type high-capacity grips optimized for prestressed steel strands per ASTM A1044 and GB/T 5224.
• Integrated overload protection, emergency stop circuitry, and pressure-relief safety valves comply with ISO 12100 and EN 60204-1 requirements for industrial machinery safety.

Sample Compatibility & Compliance

The WAW-D platform accommodates a broad spectrum of specimen geometries and material classes through its adaptable fixture ecosystem. Standard configurations support flat, round, and threaded specimens per ISO 6892-1 Annex A and ASTM E8 Annex A. With optional accessories—including bolt tensioning fixtures (ASTM F606), three-point bend fixtures (ASTM D790), double-shear fixtures (ASTM D5379), concrete flexure rigs (ASTM C78), and modular anchor/clamp assemblies for chain, cable, and fastener testing—the system meets multi-standard validation requirements. All force transducers are calibrated to ISO 376 Class 0.5 accuracy, and system-level verification follows ISO 7500-1 procedures. Data acquisition and reporting workflows support audit readiness for FDA 21 CFR Part 11-compliant environments when paired with validated software modules.

Software & Data Management

The machine interfaces with SUNS TestMaster Pro v5.x—a Windows-based control and analysis suite compliant with IEC 61508 SIL1 functional safety principles. The software enables real-time PID tuning, multi-channel synchronized acquisition (force, displacement, extensometer strain), and automated test sequence execution per pre-defined method templates. Raw data export is available in CSV, XML, and ASTM E1432-compliant .tdms formats. Audit trail functionality records user actions, parameter changes, calibration events, and test interruptions with time-stamped digital signatures. Optional integration with LIMS platforms via OPC UA or RESTful API enables traceability from sample ID to final report generation.

Applications

• Tensile characterization of structural steels, aluminum alloys, titanium grades, and composite laminates per ISO 6892-1 and ASTM E8.
• Steel strand and wire rope qualification per ASTM A1044, GB/T 5224, and EN 10138-3.
• Mechanical validation of fasteners—including proof load, yield strength, and ultimate tensile strength per ASTM F606 and ISO 898-1.
• Concrete and cementitious material testing—flexural strength (ASTM C78), splitting tensile strength (ASTM C496), and compressive modulus (ASTM C469).
• Qualification of marine-grade chains, lifting shackles, and rigging hardware per ISO 1704, EN 13889, and DNVGL-ST-E271.
• Research-grade cyclic loading protocols (e.g., low-cycle fatigue pre-conditioning) using programmable ramp-hold sequences.

FAQ

What standards does the WAW-D system support for calibration and verification?
It conforms to ISO 7500-1 for static force calibration and ISO 4287/ISO 1133 for displacement verification; system-level validation aligns with ASTM E4 and GB/T 16825.1.
Can the machine perform tests requiring environmental chambers or extensometers?
Yes—standardized mounting interfaces support integration with clip-on or contacting extensometers (ASTM E83 Class B-1), and chamber adapters enable temperature-controlled testing from –70 °C to +300 °C.
Is the G-type grip suitable for ASTM A1044 steel strand testing?
Yes—the G-grip’s self-tightening geometry and hardened jaw inserts meet the gripping efficiency and slippage resistance requirements specified in Clause 7.2 of ASTM A1044.
How is data integrity ensured during long-duration creep or hold tests?
TestMaster Pro implements redundant timestamping, non-volatile memory buffering, and automatic recovery after power interruption—preserving all acquired points and metadata without interpolation.
Does the system support remote monitoring and diagnostics?
Via optional Ethernet/IP or Modbus TCP connectivity, users can access real-time status, diagnostic logs, and predictive maintenance alerts through SUNS RemoteLink cloud service.