Hengyi HY-0580UJKKK Universal Testing Machine for Corn Stover Mechanical Characterization
| Brand | Hengyi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | HY-0580UJKKK |
| Instrument Type | Electromechanical Universal Testing Machine |
| Max Load Capacity | 5000 N |
| Load Accuracy Class | 0.5 |
| Effective Test Width | 120 mm |
| Effective Vertical Travel | 800 mm |
| Test 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 |
| Force Resolution | ±500,000 counts (full-scale, no range switching) |
| Power Supply | 220 V AC, 750 W |
| Host Dimensions (W×D×H) | 470 × 400 × 1510 mm |
| Net Weight | 95 kg |
| Total System Weight | 135 kg |
| Compliant Standards | GB/T, ISO 6892, ASTM E8/E9/E21, DIN 50125, JIS Z2241 |
Overview
The Hengyi HY-0580UJKKK Universal Testing Machine is an electromechanical static testing system engineered for high-reproducibility mechanical characterization of lignocellulosic biomass—specifically corn stover, as well as wheat and rice straw—under controlled uniaxial compression. Designed to meet the rigorous demands of agricultural materials research, biofuel feedstock development, and sustainable packaging R&D, this single-column universal tester operates on a precision servo-controlled load frame with closed-loop feedback for force, displacement, and strain. Its core measurement principle follows standardized quasi-static mechanical testing protocols defined in ISO 6892-1 (metallic materials), ASTM E9 (compression of metallic materials), and GB/T 7314 (compression testing of metallic and nonmetallic materials), adapted for low-density, heterogeneous fibrous specimens. The system delivers traceable, audit-ready data for density–stress–strain relationships during densification—critical for evaluating pelletability, briquette integrity, and structural stability in thermochemical conversion preprocessing.
Key Features
- High-accuracy dual-mode control architecture supporting force-, displacement-, and strain-controlled test modes with programmable ramp-hold-step profiles
- Integrated compression fixture assembly: 60 mm inner-diameter cylindrical die with 140 mm height, paired with hardened steel piston for uniform axial loading and minimal lateral buckling
- Full-range force transducer (5000 N capacity, 0.5-class accuracy) with 500,000-count resolution and no internal range switching—ensuring consistent sensitivity across sub-newton to kilonewton regimes
- Precision ball-screw-driven crosshead with dual-speed (fast/slow) manual jog and programmable auto-return functionality
- Digital electronic limit protection and real-time overload cutoff (>110% FS) to prevent mechanical damage during brittle failure or specimen slippage
- Self-diagnostic firmware that continuously monitors drive current, amplifier voltage, sensor offset, and thermal drift—triggering immediate fault logging and safe shutdown upon anomaly detection
- Modular software interface compatible with Windows-based lab networks and compliant with FDA 21 CFR Part 11 requirements for electronic records and signatures (audit trail enabled)
Sample Compatibility & Compliance
The HY-0580UJKKK accommodates cylindrical biomass specimens (e.g., air-dried corn stover pellets, chopped stalk segments, or consolidated fiber mats) up to 60 mm in diameter and 140 mm in height. Its open-frame design allows easy insertion and centering of irregularly shaped or hygroscopic samples. All mechanical test procedures align with internationally recognized standards: GB/T 21923–2008 (determination of compressive strength of straw-based composite panels), ISO 13061-12 (wood-based panels — determination of compressive strength parallel to plane), ASTM D143 (small clear specimens of wood), and EN 312 (particleboards). Data output includes full compliance metadata—test standard ID, environmental conditions (optional external humidity/temperature input), operator ID, calibration certificate traceability (NIST-traceable load cell certification available), and GLP/GMP-aligned audit logs.
Software & Data Management
Bundled Hengyi TestMaster v4.2 software provides real-time acquisition of force (N), displacement (mm), time (s), and calculated engineering stress/strain. It supports automated derivation of key mechanical parameters including compressive yield stress (σcy), plateau stress (σp), densification onset strain (εdo), elastic modulus (E), energy absorption per unit volume (toughness), and final bulk density (kg/m³) via integrated volumetric calculation from displacement and known die geometry. All curves—including true stress–true strain, load–displacement, and stress relaxation—are exportable in CSV, XML, and PDF formats. Raw data files are stored with embedded metadata (timestamp, user, calibration ID, test method), enabling seamless integration into LIMS environments and third-party statistical analysis platforms (e.g., JMP, Minitab, Python pandas).
Applications
- Quantifying compressive resistance and densification behavior of corn stover under industrial baling and pelletizing conditions (target density: 300 kg/m³ at 50 mm/min)
- Evaluating binder efficacy in agro-residue composites by comparing stress–strain hysteresis loops across formulation variants
- Validating finite element models of fibrous biomass deformation using experimentally derived constitutive inputs
- Supporting ASTM D3043-compliant flexural testing of straw-reinforced bioplastics when fitted with three-point bending fixtures
- Performing cyclic compression tests to assess fatigue resistance of bio-based insulation boards per ISO 1716
- Generating regulatory submission dossiers for USDA BioPreferred Program or EU Ecolabel certification requiring mechanical performance documentation
FAQ
What standards does the HY-0580UJKKK support for corn stover testing?
It natively implements GB/T 21923–2008, ASTM D143 (adapted for non-wood fibers), and ISO 13061-12. Custom test methods can be programmed via script-based protocol editor.
Can the system measure true strain during large-deformation compression?
Yes—using real-time displacement feedback and calibrated die geometry, the software computes true strain (ln(h₀/h)) and true stress (F/A₀ × h₀/h), critical for post-yield densification analysis.
Is the load cell calibrated and traceable to international standards?
Each unit ships with a factory calibration certificate traceable to CNAS-accredited laboratories; optional NIST-traceable recalibration services are available annually.
Does the software comply with FDA 21 CFR Part 11 for regulated labs?
Yes—TestMaster v4.2 includes role-based access control, electronic signature workflows, immutable audit trails, and data integrity validation per ALCOA+ principles.
What maintenance is required for long-term accuracy?
Biannual verification of force transducer linearity and crosshead alignment is recommended; no routine lubrication is needed due to sealed ball-screw and brushless servo motor design.
