MTS Series 609 Alignment Fixture - Manual (Page 40)

Series 609 Alignment Fixture Product Information 40
Flat Thin Specimens
Specimen Preparation
Flat Thin Specimens
A typical gaged specimen has three 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 twelve gages on thin flat specimens. Attach and number them as shown here.
Gage Placement—Thin Flat Specimens
• On thin rectangular specimens where gages can not be attached to all four
sides, use this twelve gage front-to-back arrangement. Attach and number
the gages as shown here.
• Place the gages in sets of four, at the top, middle, 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 middle set of gages in the middle 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
8 7
3
11 12
0° 90° 180° 270°
10
6 5
9
1 2