MTS Series 609 Alignment Fixture - Manual (Page 51)

Notched Thin Flat Specimens
Series 609 Alignment Fixture Product Information Specimen Preparation 51
Notched Thin Flat Specimens
A notched gaged specimen has two levels of strain gages. The gages allow you to
determine bending strains at each level. Analysis of the strain readings produces
a profile of the grip alignment.
Gage placement
Use eight gages on thin flat specimens. Attach and number them as shown here.
Gage Placement—Notched Thin Flat
• On thin rectangular specimens where gages cannot be attached to all four
sides, use this eight gage front-to-back arrangement. Attach and number the
gages as shown here.
• Place the gages in sets of four, at the top and bottom of the gage section.
Place each gage as close as practical to the edge of the specimen. Keep the
distance from the edge the same for all gages. Measure the distance from the
edge of the specimen to the middle of the gage. This distance will be used in
your bending strain calculations.
• Place the top set of gages so that their upper edges just touch the upper edge
of the gage section. Place the bottom set of gages so that their lower edges
just touch the lower edge of the gage section.
4 3
0° 90° 180° 270°
6 5
1 2
7 8