Hengyi HY-0580 Single-Column Electronic Universal Testing Machine for Corn Stover Compression Stress Relaxation Testing
| Brand | Hengyi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | HY-0580JKLMN |
| Instrument Type | Electronic Universal Testing Machine |
| Load Capacity | 5000 N |
| Accuracy Class | 0.5 |
| Force Resolution | ±500000 counts (full-scale, no range switching) |
| Effective Test Width | 120 mm |
| Effective Vertical Travel | 800 mm |
| Speed Range | 0.001–500 mm/min |
| Speed Accuracy | ±0.5% of indicated value |
| Displacement Measurement Accuracy | ±0.5% of indicated value |
| Strain Measurement Accuracy | ±0.5% of indicated value |
| Stress Control Rate Range | 0.005–6 %FS/S |
| Strain Control Rate Range | 0.002–6 %FS/S |
| Constant-Load/Displacement/Strain Control Range | 0.5–100 %FS |
| Protection Features | Electronic limit switch, overload protection at 110% FS, automatic fault diagnosis |
| Power Supply | 220 V AC, single-phase, 750 W |
| Dimensions (W×D×H) | 470 × 400 × 1510 mm |
| Net Weight | 95 kg |
| Total System Weight | 135 kg |
Overview
The Hengyi HY-0580 is a precision-engineered single-column electronic universal testing machine specifically configured for static mechanical characterization of low-density, heterogeneous lignocellulosic biomass—particularly corn stover—under compressive loading conditions. It operates on the fundamental principle of controlled-force or controlled-displacement axial compression, enabling quantitative evaluation of stress relaxation behavior, compressibility, densification kinetics, and structural recovery following load removal. Unlike general-purpose tensile testers, the HY-0580 integrates a dedicated 60 mm internal-diameter cylindrical compression die (140 mm height) optimized for standardized bale formation and real-time acquisition of force–displacement–time histories during quasi-static compaction at rates up to 50 mm/min. Its modular architecture supports both compression-only workflows (e.g., ASTM D1621 for rigid cellular plastics, adapted for biomass) and full bidirectional static testing per ISO 6892-1, ASTM E8/E9, and GB/T 228.1–2021, with automated calculation of key mechanical descriptors including compressive modulus, yield plateau stress, relaxation time constants, and residual deformation.
Key Features
- High-accuracy force measurement system compliant with ISO 7500-1 Class 0.5, featuring ±500000-count resolution across the full 5–5000 N load range without auto-ranging or hardware switching
- Programmable crosshead speed from 0.001 to 500 mm/min, with closed-loop control ensuring ≤±0.5% deviation from setpoint under dynamic load conditions
- Dedicated compression fixture assembly: precision-machined stainless steel die (ID = 60 mm, H = 140 mm) and hardened piston, designed to minimize lateral buckling and ensure uniform axial stress distribution in low-modulus biomass specimens
- Integrated real-time data acquisition capturing synchronized force (N), displacement (mm), strain (%), and elapsed time (s) at user-defined sampling intervals down to 10 ms
- Robust mechanical frame with reinforced aluminum alloy column and high-rigidity base plate, minimizing parasitic deflection during high-force compression cycles
- Comprehensive safety architecture: dual-mode electronic limit switches, 110% over-load cut-off, automatic emergency stop upon power anomaly or thermal sensor trigger, and self-diagnostic firmware monitoring drive current, voltage, and encoder integrity
Sample Compatibility & Compliance
The HY-0580 accommodates uncompressed or pre-conditioned corn stover, wheat straw, and rice straw specimens within defined geometric constraints (max. Ø60 mm × 140 mm height). Its test methodology aligns with internationally recognized standards for compressive property assessment of fibrous and porous materials—including ASTM D3574 (flexible cellular materials), ISO 844 (rigid cellular plastics), and GB/T 21551.2–2010 (biomass pellet density and durability). All test sequences support GLP-compliant audit trails: timestamped raw data files, operator ID logging, calibration certificate references, and version-controlled test method templates. The system meets electromagnetic compatibility requirements per IEC 61326-1 and electrical safety standards per IEC 61010-1, facilitating integration into regulated laboratory environments requiring traceability under ISO/IEC 17025 or FDA 21 CFR Part 11 (when paired with validated software).
Software & Data Management
The HY-0580 operates with Hengyi’s proprietary TestMaster v4.x software suite, a Windows-based platform supporting multi-language UI (English, Chinese, Spanish), role-based access control, and encrypted database storage. It enables fully automated execution of stress-relaxation protocols—including ramp-hold-relax sequences, multi-step compression cycles, and time-dependent creep analysis—with built-in algorithms for calculating relaxation modulus decay curves (G(t)), logarithmic time constants (τ), and normalized stress retention (%) at user-specified intervals. Raw data exports to CSV, Excel, and XML formats; graphical outputs include force–time, stress–strain, and log(stress)–log(time) plots with customizable curve fitting (Burgers, Maxwell, Prony series). Audit logs record all parameter modifications, calibration events, and report generation actions—fully compliant with ALCOA+ data integrity principles.
Applications
- Quantifying compressive stress relaxation kinetics of corn stover pellets during storage and transport, supporting predictive modeling of density loss and structural degradation
- Evaluating binder efficacy in agro-residue briquetting processes by comparing relaxation profiles across formulations (e.g., lignin vs. starch binders)
- Validating densification parameters for industrial-scale pellet mills via correlation between lab-scale HY-0580 results and pilot-plant throughput metrics
- Supporting R&D for bio-based packaging foams by measuring recovery behavior after unloading, informing resilience and energy absorption capacity
- Generating input data for finite element models simulating biomass compaction in hydraulic presses or roller dies
- Teaching laboratories: hands-on instruction in viscoelastic theory, standard mechanical testing procedures, and ISO/ASTM compliance documentation
FAQ
What types of biomass specimens are compatible with the HY-0580 compression die?
Corn stover, wheat straw, rice straw, and other herbaceous feedstocks with particle size ≤10 mm and moisture content ≤15% (w.b.) can be tested using the standard 60 mm ID die. Custom dies (Ø40 mm, Ø80 mm) are available for specialized geometries.
Does the system support automated stress-relaxation testing per ISO 11403-2?
Yes—the software includes preconfigured ISO 11403-2 stress-relaxation templates with programmable hold durations (1 s to 10,000 s), automatic modulus decay calculation, and reporting of GN(t) values at t = 1, 10, 100, and 1000 s.
Can the HY-0580 be used for tensile testing of filamentous biopolymers?
Yes—when equipped with wedge-action grips and extensometer adapters, it performs uniaxial tensile tests on electrospun cellulose nanofiber mats, chitosan films, and alginate hydrogels per ASTM D882 and ISO 527-3.
Is calibration traceable to national metrology institutes?
All factory calibrations are performed using NIST-traceable deadweight standards (Fluke 7010 series), with certificates issued per ISO/IEC 17025 requirements and valid for 12 months.
What maintenance is required to sustain 0.5-class accuracy?
Biannual verification of load cell linearity, crosshead alignment, and encoder resolution is recommended; annual recalibration is advised for GLP-regulated labs. No lubrication of the lead screw is required—the system employs preloaded ball screws with sealed grease retention.
