Introduction to strain gauging

Choosing the strain gauges and consumables is just the start. Next comes installation, which is labour-intensive and depends on the skill of the operator. The whole process can be broken down into a number of basic stages:

1. Inspecting the test specimen, especially the strain gauge location and surface finish.
2. Ensuring that the operator has a full set of installation requirements, a job file and an understanding of the test specimen limitations, such as temperature limits.
3. Preparing the strain gauge and organising bonding clamps, if necessary.
4. Preparing the test specimen for surface cleansing.
5. Marking out the strain gauge position.
6. Chemically cleaning the surface of the test specimen.
7. Positioning the strain gauge on the test specimen.
8. Applying adhesive and applying clamping pressure if a heat curing adhesive is used.
9. Unclamping and inspecting the installation and, if necessary, post curing the installation.
10. Inspecting the installation again and beginning wiring.
11. Inspecting the wiring and checking for resistance, leakage and micro strain out of balance.
12. Applying the coatings, ensuring that the correct cure times are used.
13. Completing the strain gauge installation sheet. Click here to see an example.

This is only a brief run through the installation process, but it gives a flavour of what is involved.

Tip: It’s always useful to take photographs during installation for the job file. Not only does this help to complete the report, it also provides some dimensional detail.

Can I use a strain gauge on my project?

The answer is almost certainly YES. However, the easiest way to find out is the complete the Strain Gauge Installation Questionnaire and let our sales team investigate further.