Electronic universal testing machine selection - Database & Sql Blog Articles

Selection of Electronic Universal Testing Machine

Model Selection:

First, determine the maximum force value you need to test.

The maximum force is below 2KN, then a single column electronic tensile testing machine is usually sufficient.

If it's between 2KN and 50KN, a double-column desktop electronic universal testing machine is recommended.

For forces above 50KN, a floor-standing electronic universal testing machine is ideal.

Racks should be ergonomically designed to ensure safety, reduce operator fatigue, and provide maximum flexibility for different applications.

Body Speed and Height Selection:

Understand the test space required for your application.

Typically, a beam displacement of 898mm and a vertical test space of 1067mm are sufficient for most tests.

If testing elastomers, you may need a slightly larger space. Therefore, an extra wide or ultra-high rack can accommodate various customer needs.

Load Sensor Selection:

Ensure that the load sensor meets or exceeds ASTM D638 and ISO 7500/1 standards.

Key factors to consider include range, accuracy, repeatability, offset loading error, nonlinearity, temperature zero drift, and sensitivity.

Automatic identification, calibration, and zeroing of load cells improve efficiency and data consistency.

It’s also important to have self-identification features before starting tests to avoid human errors. A full-range adjuster eliminates manual range adjustments by operators.

Strain Measurement Selection:

Materials deform when subjected to stress, even slightly. This deformation, known as compliance, can affect test accuracy, especially in high-load, low-stroke scenarios.

To minimize this, racks must be designed with strong beam guides, high stiffness load cells, and fixtures for accurate results.

An extensometer can help eliminate system compliance errors when precise specimen deformation measurements are needed.

There are two main types of extensometers:

1. Contact Extensometer: Available in clip-on, long stroke, and high-temperature models.

2. Non-contact Extensometer: Video optical extensometer.

Advantages of video optical extensometers:

- No external force applied to the sample, ensuring accurate results.

- Avoids damage from sharp edges of traditional extensometers.

- Eliminates measurement errors caused by sliding blades on the specimen.

- Prevents damage from breaking samples during testing.

- Easy to operate and suitable for materials like fiber optics, metal foils, and composites.

Video optical extensometers with high resolution and fast image acquisition significantly boost work efficiency.

Fixture Selection:

A successful clamping solution ensures the specimen doesn’t slip or damage the jaws, while maintaining axial alignment of the applied force.

In some cases, special fixtures or tooling may be necessary to meet specific test standards. Having a variety of fixtures and extensive application experience is essential.

Software Features and Performance Options:

Easy installation and intuitive interface make the software user-friendly.

Convenient copy-paste functions and powerful calculations are available.

Extensive built-in database includes options for ASTM, ISO, BS, EN, DIN standards, including maximum load, breaking load, yield, modulus, and more.

Test prompts increase speed and efficiency, while advanced analysis tools allow users to define custom calculations.

Graphics and Reports:

Customizable graphs, charts, and auto-scaling features enhance visual clarity.

Reports can be generated in multiple formats such as PDF, MS Word, and HTML for easy sharing of detailed test results.

Data export compatibility with third-party software like Excel and Word makes it easier to integrate results into other workflows.

Security and Reliability:

User management, password protection, and customizable limits ensure secure operation.

Modular design allows for future upgrades, while online help provides guidance on test procedures, tips, and terminology.

Reliable performance with user-defined end conditions helps maintain consistent and accurate testing outcomes.