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Rectangular Rosette Pattern Strain Gages

A strain gage rosette is, by definition, an arrangement of two or more closely positioned gage grids, separately oriented to measure the normal strains along different directions in the underlying surface of the test part. Rosettes are designed to perform a very practical and important function in experimental stress analysis.

 

It can be shown that for the not-uncommon case of the general biaxial stress state, with the principal directions unknown, three independent strain measurements (in different directions) are required to determine the principal strains and stresses. Moreover, even when the principal directions are known in advance, two independent strain measurements are needed to obtain the principal strains and stresses.

CEA Series Tee Rosette Strain Gages

 

 

 

 

 

 

 

 

 

 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            

 

Configuration

 

Pattern   Res. [Ω]  

Gage 

Length 

 

Gage 

Width

 

Matrix

Length 

 

Matrix

Width

  Standard STC  

Temperature Range

  Options
                                   
3 Element Planar   Rosette Strain Gage 062UR  

120,

350

 

0.062

[1.57]

 

0.062

[1.57]

 

0.32

[8.1]

 

0.48

[12.2]

 

 

00, 03, 05,

06, 09, 13

 

 

–100° to +350°F 

(–75° to +175°C)

 

 

 P2

                           
125UR  

120,

350

 

0.125
[3.18]

 

0.060

[1.52]

 

0.42

[10.7]

 

0.62

[15.7]

     
                             
  250UR  

120,

350

 

0.250
[6.35]

 

0.120

[3.05]

 

0.65

[16.5]

 

0.80

[20.3]

           
 

 


 


 


 


 


 


 


 


 


 


 

           
                                   
                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive    –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
  –320° to +400°F (–195° to +204°C)
                                 
  M-Bond 600 Kit    Two-component, solvent-thinned, epoxy-phenolic strain gage adhesive for high-performance    –452° to +500°F (–268° to +260°C)
                                   
                                   
                                   
                                   

C2A/C4A Series 3-Element Rosette Gages


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            
Configuration Pattern   Res. [Ω]  

Gage

Length 

 

Gage 

Width

 

Matrix

Length

 

Matrix

Width

  Standard STC    Temperature Range   Options
                                   
3 Element  Stacked Rosette Strain Gage G1350   120  

0.040

[1.02]

 

0.045

[1.14]

 

0.20

[5.1]]

 

0.20

[5.1]

 

 

00, 03, 05,

06, 09, 13

 

   

 –100° to +350°F   (–75° to +175°C)

 

 

E, EL, P, W, SP11

                             
  031WW   120  

0.031

[0.79]

 

0.070

[1.78]

 

0.28

[7.1]

 

0.32

[8.1]

     
                             
  062WW   120, 350  

0.062

[1.57]

 

0.050
[1.27]

 

0.26

[6.6]

 

0.32

[8.1]

     
                                   
  125WW   120, 350  

0.125

[3.18]

 

0.070

[1.78]

 

0.31

[7.9]

 

0.38

[9.7]

           
                                   
  250WW  

120,

350

 

0.250

[6.35]

 

0.100

[2.54]

 

0.42

[10.7]

 

0.48

[12.2]

           
 

 


 


 


 


 


 


 


 


 


 


 

           
3 Element  Planar Rosette Strain Gage 062LR  

120, 350

 

0.062

[1.57]

 

0.050

[1.27]

 

0.28

[7.1]

 

0.41

[10.4]

           
                           
125PR   120, 350  

0.125

[3.18]

 

0.429

[2.01]

 

0.30

[7.7]

 

0.51

[12.9]

     
                             
  250LR   120, 350  

0.250

[6.35]

 

0.250

[6.35]

 

0.100

[2.54]

 

0.72

[18.3]

             
 

 


 


 


 


 


 


 


 


 


 


 

           
                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive    –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
  –320° to +400°F (–195° to +204°C)
                                 

M-Bond 600 Kit 

 

Two-component, solvent-thinned, epoxy-phenolic strain gage adhesive for high-performance

   –452° to +500°F (–268° to +260°C)
                                 
                                   
                                   
                                   

C5K Series 3-Element Rosette Gages


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            
Configuration Pattern   Res. [Ω]  

Gage 

Length

 

Gage 

Width

 

Matrix

Length

 

Matrix

Width

  Standard STC    Temperature Range   Options
                                   
3 Element Planar Rosette Strain Gage S5198   350  

0.014

[0.36]

 

0.014

[0.36]

 

0.08

[2.0]

 

0.15

[3.8]

 

 

00,03,05,

06,09,13

 

  

 –100° to +400°F

(–75° to +205°C)

 

 

23P, 39P, 2R

                             
  062PR   350  

0.062

[1.57]

 

0.062

[1.57]

 

0.250

[6.35]

 

0.460

11.68

     
 

 


 


 


 


 


 


 


 


 


 


 

 

 

 

 

 

 

                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive   –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
   –320° to +400°F (–195° to +204°C)
                                 
M-Bond 600 Kit    Two-component, solvent-thinned, epoxy-phenolic strain gage adhesive for high-performance    –452° to +500°F (–268° to +260°C)
                                   
                                   
                                   

WK Series 3-Element Rosette Gages


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            
Configuration Pattern   Res. [Ω]  

Gage

Length 

 

Gage 

Width

 

Matrix

Length

 

Matrix

Width

  Standard STC    Temperature Range   Options
                                   
3 Element  Stacked Rosette Strain Gage 060WR  

350,

1000

 

0.060

[1.52]

 

0.060

[1.52]

 

0.24

[6.1]

 

0.30

[7.6]

 

 

00,03,05

,06,09,13

 

 

 –452° to +550°F

 (–269° to +290°C)

 

 

W, SP11

                           
  120WR   350  

0.120

[3.05]

 

0.080

[2.03]

 

0.34

[8.6]

 

0.40

[10.2]

     
                             
  250WR  

350,

1000

 

0.250

[6.35]

 

0.125

[3.18]

 

0.51

[13.0]

 

0.60

[15.2]

     
 

 


 


 


 


 


 


 


 


 


 


 

     
3 Element Planar Rosette Strain Gage 062RB  

350,

1000

 

0.062

[1.57]

 

0.062

[1.57]

 

0.42

[10.7]

 

0.46

[11.7]

     
                           
125RA   350  

0.125

[3.18]

 

0.062

[1.57]

 

0.39

[9.9]

 

0.46

[11.7]

     
                             
  250RA   350  

0.250

[6.35]

 

0.125

[3.18]

 

0.78

[19.8]

 

0.93

[23.6]

     
                             
  250RD   1000  

0.250

[6.35]

 

0.125

[3.18]

 

0.78

[19.8]

 

0.93

[23.6]

     
 

 


 


 


 


 


 


 


 


 


 


 

     
 

 

 

 

 

 

 

 

 

 

 

 

           
                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive   –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
  –320° to +400°F (–195° to +204°C)
                                 
M-Bond AE-15 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
   –320° to +200°F (–195° to +95°C)
                                   
                                   

EA Series 3-Element Rosette Gages


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            
Configuration Pattern   Res. [Ω]  

Gage

Length 

 

Gage 

Width

 

Matrix

Length

 

Matrix

Width

  Standard STC    Temperature Range   Options
                                   
3 Element  Stacked Rosette Strain Gage 031RB  

120

 

0.031

[0.79]

 

0.031

[0.79]

 

0.19

[4.8]

 

0.24

[6.1]

 

 

00, 03, 05, 06, 09, 13

 

 

 –100° to +350°F

 (–75° to +175°C)

 

 

E, EL, W, SP11

                           
  062RB   120  

0.062

[1.57]

 

0.062

[1.57]

 

0.42

[10.7]

 

0.46

[11.7]

     
                                 
  125RD  

350

 

0.125

[3.18]

 

0.062

[1.57]

 

0.40

[10.2]

 

0.47

[11.9]

     
 

 


 


 


 


 


 


 


 


 


 


 

         
                                   
                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive   –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
  –320° to +400°F (–195° to +204°C)
                                 
M-Bond AE-15 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
   –320° to +200°F (–195° to +95°C)
                                   
                                   
                                   

 


 

Many Directions, One sensor.. the 3 Element Rosette

Imagine a firefighter trying to put out three fires at once by spraying a hose back and forth over them all. There is never enough water in one place to extinguish the blaze. Now try to imagine a stress analyst trying to measure strain with three discrete linear strain gages in different directions. 3-element rosettes are used where the direction of peak strain (known as the maximum and minimum principle strains) is unknown. By recording the three separate strains, a calculation can additionally tell the user direction of the strains, shear strains, and if the material properties are known the stresses can also be calculated – not possible with a single strain measurement.

 

Example of an automotive steering knuckle which can be loaded due to road surface changes, steering, and braking. All of which will likely have unique directions of principal strains/stresses.  When simultaneously sampled the three element rosette can show how the principal strain directions and magnitude can change with different loading conditions.

 

Knowledge in the selection and application of rosettes is critical to their successful use in experimental stress analysis. Knowledge in the selection and application of rosettes is critical to their successful use in experimental stress analysis

 

The simple determination for when a three-element rosette should be used is the answer to the question, “Are the directions and magnitudes of the principal strains and stresses known?”  If the answer is no, then a three-element rosette most likely is needed.

 

Our TechNote 515 provides guidance regarding rosette selection, application and data reduction for all types for rosette gages.

 

Rosettes are available in two distinct types – rectangular (0-45-90° between grids) and delta (0-60-120° between grids) with the former being the most common. Additionally, they can be planar (grids next to each other) or stacked (grids on top of one another). Accuracy comparisons can be discussed, but each type can suit different applications.

 

They are available as pre-wired miniature for PCBA testing (as small as 2 x 4mm with 0.36mm grids), to large planar versions best suited for plastic composites, including GFRP, CFRP (carbon composite) and sandwich structures.

 

 

Explore our extensive collection of tutorials and informational videos on a variety of strain measurement topics.

Explore our free education seminars aimed at helping Design and Test Engineers understand strain gage theory selection, preparation, performance, installation, configuration, and more.

Questions and answers on the go! Listen to Micro-Measurements experts explain the many facets of strain gage technology.

Benefit from an extensive series of regularly scheduled, hands-on technical workshops and short courses.