Universal Test Machine

A custom-built, low-cost device for basic mechanical testing. It combines modular hardware with and easy-to-use GUI to deliver accurate and precise force–displacement data and optical measurements without the steep price of commercially available systems.

Purpose

Characterize material properties under uniaxial loading.
Provide a budget-friendly, customizable platform for rapid experimental setups.

Mechanical Design

Load cell — FUTEK 10 N (quick swappable with other capacities).
Actuation — Zaber stepper motors driving lead screws.
Travel — 102 mm maximum displacement at speeds up to 20 mm/s.
Frame — Aluminum T-slot extrusion for rigidity and modularity.
Sample Mounting — Custom 3D-printed mounts to accommodate any sample.

Control & Data Acquisition

Interface — Custom LabVIEW-based GUI for test control, live data visualization, and data logging.
Connection - USB connection make for easy setup and connection to the device.
Sensors — Integrated motor encoders and load cell for synchronized force–displacement measurements.
Sampling — Data is recorded as the test progresses, preventing data loss in unforeseen circumstances.

Imaging Capability

Attachable camera for synchronized image capture.
Enables digital image correlation (DIC) to map strain fields after tests.

Key Benefits

Modular and low-cost (< $3,000) architecture.
Supports different load cells and sample grips.
Compact and portable.
Simple software package and GUI simplifies test setup, control, and data export.

DIC on a rubber sample tensile test conducted with the UTM.