Hengyi HY-0580ioi Universal Tensile Testing Machine for Hydrogel and Biomedical Materials

Overview

The Hengyi HY-0580ioi is a high-precision, electromechanical universal testing machine engineered for static and quasi-static mechanical characterization of soft and hard biomaterials—particularly hydrogels, tissue-engineered scaffolds, synthetic vascular grafts, orthopedic implants, and hybrid composites. It operates on the principle of controlled axial displacement and force feedback via servo-controlled DC motor actuation, coupled with high-resolution load cell transduction and closed-loop PID control. Designed in accordance with ISO 5832, ASTM F2118, ISO 1798, and USP guidelines for biomaterial mechanical testing, the system supports full compliance with GLP and GMP-aligned test protocols when integrated with audit-trail-enabled software. Its modular architecture enables seamless adaptation across R&D laboratories, quality control units in medical device manufacturing, and preclinical biomechanics research facilities.

Key Features

• 5 kN dual-range load frame with interchangeable load cells (1 N to 5000 N), supporting micro-force testing of fragile hydrogel specimens and macro-scale evaluation of bone screws or spinal cages.
• Full-scale force resolution up to 1:500,000 codes, maintaining constant resolution across the entire measurement range without auto-ranging or internal switching.
• Precision displacement control with 0.001 mm resolution and ±0.5% accuracy over 800 mm travel, enabling accurate strain quantification in low-modulus materials (e.g., <10 kPa hydrogels).
• Programmable speed control from 0.001 to 500 mm/min, with real-time feedback compensation ensuring stable ramp-hold cycles essential for creep, stress-relaxation, and cyclic fatigue protocols.
• Dual-mode control architecture: stress-controlled (0.005–6% FS/s) and strain-controlled (0.002–6% FS/s), each with dynamic accuracy thresholds calibrated per ISO 5832-3 Annex B.
• Integrated safety suite including electronic limit switches, overload cutoff (>110% FS), automatic return-to-home, and programmable end-of-test triggers (force, displacement, time, or deformation-based).
• Robust mechanical design: rigid four-column frame with hardened steel crosshead guides, minimizing lateral deflection during off-axis loading of asymmetric implants (e.g., interbody fusion devices).

Sample Compatibility & Compliance

The HY-0580ioi accommodates standardized geometries (ASTM D638 Type I–V, ISO 527-2, ISO 6892-1) as well as custom fixtures for irregular biomedical specimens—including suture anchors, dental implants, porous titanium scaffolds, decellularized tissue strips, and multi-layered hydrogel constructs. Fixture options include pneumatic grips, wedge-action clamps, compression platens, 3-point bending jigs, and specialized pull-out testers for screw-bone interface analysis. All mechanical test methods align with regulatory expectations for 510(k) submissions and ISO 14155-compliant clinical trial support documentation. The system meets electromagnetic compatibility (EMC) requirements per IEC 61326-1 and environmental operating conditions per ISO 17025:2017 (20–40 °C, 20–80% RH).

Software & Data Management

Control and analysis are performed via Hengyi’s proprietary BioTestSuite™ v4.2 software—validated for 21 CFR Part 11 compliance with role-based access control, electronic signatures, and immutable audit trails. The platform supports automated method templates for tensile strength, Young’s modulus, yield point, elongation at break, fracture energy, and hysteresis loop integration. Raw data export is available in CSV, XML, and HDF5 formats for third-party statistical analysis (e.g., JMP, MATLAB, Python SciPy). Real-time plotting includes dual-axis force-displacement, stress-strain, and cycle-by-cycle overlay views. Calibration certificates traceable to NIM (National Institute of Metrology, China) are embedded and version-controlled within each test record.

Applications

• Mechanical validation of hydrogel-based wound dressings under uniaxial tension and cyclic loading.
• Failure mode analysis of bioresorbable polymer screws under torsional-compressive coupling (via optional accessory).
• Interfacial shear strength assessment between ceramic coatings and metallic substrates used in joint prostheses.
• Compression modulus mapping of 3D-bioprinted cartilage mimics using displacement-controlled ramp-hold sequences.
• Peel adhesion testing of pressure-sensitive hydrogel electrodes per ISO 22891.
• Fatigue life evaluation of nitinol stents under pulsatile loading profiles (requires optional hydraulic actuator upgrade).
• Standardized pull-out testing of pedicle screws in synthetic bone blocks (ASTM F543).

FAQ

What standards does the HY-0580ioi support for hydrogel mechanical testing?
It complies with ISO 1798 for flexible cellular materials, ASTM D412 for rubber-like polymers, and ISO 13782 for hydrogel-specific swelling–mechanics correlation protocols.
Can the system perform simultaneous force and displacement control?
Yes—dual-loop control allows concurrent regulation of stress rate and strain rate, critical for simulating physiological loading scenarios such as arterial distension.
Is calibration traceable to international metrology institutes?
All factory calibrations are traceable to NIM (China) and optionally certifiable to PTB (Germany) or NIST (USA) upon request.
Does the software support automated report generation for regulatory submissions?
Yes—BioTestSuite™ generates PDF reports with embedded metadata, digital signatures, and revision history required for FDA IDE/IDE supplement dossiers.
What is the minimum measurable force for hydrogel samples with low elastic modulus?
With the 1 N load cell option, the system achieves sub-milligram resolution (0.001 N) and maintains linearity down to 0.1% FS—suitable for soft hydrogels with moduli below 5 kPa.