Tuofeng TFW-298 Microcomputer-Controlled Electromechanical Universal Testing Machine

Overview

The Tuofeng TFW-298 is a high-capacity, microcomputer-controlled electromechanical universal testing machine engineered for precision mechanical characterization of geosynthetic materials—including geogrids, geotextiles, geomembranes—and structural composites used in civil infrastructure, soil reinforcement, and retaining systems. It operates on the principle of controlled uniaxial force application via a closed-loop servo system, enabling accurate measurement of tensile strength, yield behavior, elongation at break, modulus of elasticity, and load-deformation response under standardized loading protocols. Designed to meet the rigorous demands of geotechnical engineering laboratories and quality assurance departments, the TFW-298 delivers reproducible results across diverse specimen geometries and failure modes—particularly critical for validating compliance with EN 10225, ASTM D6637, ISO 10319, and GB/T 17689.

Key Features

• 300 kN maximum load capacity with ±0.5% load accuracy over 0.2–100% of full scale—certified per ISO 7500-1 Class 0.5
• High-stiffness frame with reinforced crosshead and precision-ground ball screws ensuring minimal deflection and long-term dimensional stability
• Imported servo motor coupled with low-backlash worm-gear reduction for smooth, noise-free actuation across the full speed range (0.001–500 mm/min)
• Dual-mode displacement measurement: optical encoder (±0.005% reading) for gross motion; optional ASTM E83-compliant extensometer (±0.005% reading) for localized strain quantification
• Integrated safety architecture including programmable electronic limit switches, hardware-triggered emergency stop, and automatic overload cutoff at 110% F.S.
• Intelligent crosshead control with dual-speed auto-return and jog functionality for rapid specimen setup and post-test recovery

Sample Compatibility & Compliance

The TFW-298 accommodates standard geogrid specimens per ASTM D6637 (tensile testing of polymer grid geosynthetics) and EN ISO 10319 (wide-width tensile testing). With customizable jaw configurations—including pneumatic, wedge-action, and hydraulic clamping—the system supports flat, ribbed, nodular, and coated geogrid architectures without slippage or premature failure at grips. Optional environmental enclosures enable testing at controlled temperature/humidity per ASTM D882 or ISO 527-2. All hardware and firmware comply with CE Machinery Directive 2006/42/EC, and software architecture supports GLP/GMP traceability when configured with audit trail and electronic signature modules per FDA 21 CFR Part 11.

Software & Data Management

Tuofeng’s proprietary TESTSuite™ v5.2 provides a validated, multi-language platform for test definition, real-time monitoring, and post-processing. The software supports ASTM E4-compliant calibration routines, automatic derivation of tensile parameters (e.g., ultimate tensile strength, secant modulus, junction efficiency), and comparative analysis of batch-to-batch performance. Raw data are stored in ASCII CSV and XML formats with embedded metadata (operator ID, timestamp, calibration certificate ID, environmental conditions). Built-in report templates conform to ISO/IEC 17025 documentation requirements, and optional digital signature integration ensures data integrity for third-party certification submissions.

Applications

• Tensile strength and elongation testing of biaxial and uniaxial polypropylene/polyester/geogrid reinforcements per AASHTO M288 and BS 8006
• Joint efficiency evaluation of welded or overlapped geogrid seams under sustained loading
• Creep and stress-relaxation profiling using load-hold and displacement-hold control modes
• Compression testing of confined geogrid-soil composites in triaxial simulation fixtures
• Quality conformance verification for ISO 9001-certified manufacturing facilities and DOT-approved material submittals
• Research-grade mechanical modeling input for finite element analysis of reinforced earth structures

FAQ

What standards does the TFW-298 support for geogrid tensile testing?
ASTM D6637, EN ISO 10319, GB/T 17689, AASHTO M288, and BS 8006—fully implemented through preconfigured test methods and reporting templates.
Can the system perform creep testing on geosynthetics?
Yes—via load-hold or displacement-hold control modes with user-defined dwell times up to 10,000 hours and automated data logging at configurable intervals.
Is the software compliant with FDA 21 CFR Part 11 requirements?
Standard software includes audit trail logging; 21 CFR Part 11 compliance requires optional electronic signature module and system validation package.
What is the resolution of force measurement?
Internal force transducer resolution is 1 part in 500,000 full-scale codes, with no range switching—ensuring consistent sensitivity across the entire 300 kN span.
Do you offer application-specific fixtures for geogrid testing?
Yes—standard offerings include wide-width tensile grips (up to 300 mm width), junction strength fixtures, and anchorage pullout assemblies; custom designs available upon request.