Brookfield YL-S70 Universal Testing Machine (Compression & Tensile)

Overview

The Brookfield YL-S70 Universal Testing Machine is an electromechanical static testing system engineered for precision mechanical characterization of materials under uniaxial compression, tension, bending, shear, and peel loading conditions. Based on servo-motor-driven ball-screw actuation and high-fidelity load cell transduction, the YL-S70 implements fundamental principles of Hookean elasticity and plastic deformation analysis in accordance with ASTM E4, ISO 7500-1, and GB/T 228.1 standards. Its modular architecture supports rapid reconfiguration between compression (e.g., concrete cubes, foam blocks, packaging cartons), tensile (e.g., polymer films, textile yarns, adhesives), and flexural (3-point/4-point bending per ASTM D790) test modes—making it suitable for QC laboratories, R&D centers, and contract testing facilities operating under GLP or ISO/IEC 17025 frameworks.

Key Features

• Servo-controlled crosshead with programmable speed range from 0.01 to 500 mm/min, enabling quasi-static to moderate-rate mechanical response capture;
• High-rigidity aluminum extrusion guard housing with sandblasted and anodized silver finish, ensuring long-term dimensional stability and corrosion resistance;
• ABS thermoplastic enclosure with electrostatic powder coating for impact resistance and cleanroom-compatible surface integrity;
• Micro-adjustment limit switches at upper and lower stroke extremes for precise positioning repeatability;
• Quick-release tooling interface supporting standardized ISO 2041 and ASTM E8/E9-compliant fixtures—including compression platens (550 mm × 550 mm), wedge-action grips, bend supports, and puncture probes;
• Comprehensive hardware safety suite: overload cutoff, emergency stop button, automatic fracture detection, dual-end travel limit sensing, and software-enforced force/stroke boundaries;
• Integrated dual-directional load cell capable of seamless switching between tensile and compressive force measurement without recalibration.

Sample Compatibility & Compliance

The YL-S70 accommodates specimens ranging from thin elastomeric sheets (<0.1 mm) to rigid structural components (up to 700 mm height and 550 mm width). It complies with essential regulatory and industry requirements including ASTM D638 (tensile plastics), ASTM C39 (concrete compression), ISO 179 (impact-modified polymers), and GB/T 1040 (general plastics tensile testing). All firmware and software modules are designed to support audit-ready data integrity: time-stamped raw acquisition logs, user-access control levels, electronic signature capability, and optional 21 CFR Part 11 compliance packages for pharmaceutical and medical device validation environments.

Software & Data Management

The proprietary PC-based testing software provides real-time multi-curve visualization—including force-displacement, force-time, displacement-time, and stress-strain plots—with dynamic toggling, zooming, panning, and crosshair cursor interrogation. Up to seven user-defined analysis intervals can be applied per test; manual point selection (up to 40 points) and automated peak/trough detection (up to 120 points) facilitate granular post-processing. Statistical reporting includes maximum/minimum values, arithmetic mean, trimmed mean (excluding top/bottom 5%), median, standard deviation, population standard deviation, and process capability index (CPK). Historical datasets can be overlaid for comparative trend analysis across batches or material lots. The software supports export to CSV, Excel, PDF, and XML formats, and integrates natively with LIMS via ODBC or REST API endpoints.

Applications

• Compressive strength evaluation of corrugated cardboard boxes (ASTM D642), expanded polystyrene (EPS) foams (ASTM D1621), and ceramic tiles (ISO 10545-3);
• Tensile property mapping of thermoplastic elastomers (TPE), biomedical sutures (ISO 10993-12), and pressure-sensitive adhesives (PSTC-107);
• Three-point bending tests on composite laminates (ASTM D7264) and fiber-reinforced plastics (ISO 14125);
• Cyclic compression endurance of polyurethane gaskets and silicone seals (ISO 3386-1);
• Puncture resistance assessment of footwear soles (ISO 20344), surgical drapes (ASTM F1670), and geomembranes (GRI-GM13);
• Static and dynamic spring characterization (force-deflection hysteresis, relaxation behavior).

FAQ

What is the maximum allowable specimen height for compression testing?
The YL-S70 supports a maximum test height of 700 mm between platens, accommodating standard concrete cylinders (150 mm × 300 mm), large foam blocks, and stacked packaging assemblies.
Can the system perform closed-loop strain control?
Yes—the software supports strain-controlled ramp-and-hold profiles using optional extensometer inputs (sold separately), compliant with ASTM E83 and ISO 9513 calibration traceability requirements.
Is the load cell calibrated and certified to international standards?
Each unit ships with a factory-calibrated load cell traceable to NIM (China National Institute of Metrology) and includes a certificate of conformity per ISO/IEC 17025; third-party calibration services are available upon request.
Does the software meet FDA 21 CFR Part 11 requirements?
A validated version with electronic signatures, audit trail logging, role-based access control, and data immutability features is available as an optional upgrade for regulated industries.
What accessories are included by default?
Standard delivery includes one USB-to-RS232 converter cable, installation media, operator manual, and basic compression platens; grips, extensometers, and environmental chambers are configured per application-specific order.