RY Strain Gauge Rosettes with 3 Measuring Grids for Analyzing Biaxial Stress States with Unknown Principal Directions

RY strain gauges have 3 measuring grids arranged at an angle of 0°/45°/90° (types RY1, RY3, RY8, RY9, RY10), or 0°/60°/120° (types RY4, RY7). These strain gauges (SGs) are an appropriate choice for analyzing the biaxial stress state with unknown principal directions.

With these types we offer you strain gauges (SG) in various geometries and sizes, each available with temperature responses adapted to the following materials:

  • Ferritic steel (10.8 ppm/K; 6.0 ppm/°F); temperature matching code: 1
  • Aluminum (23 ppm/K; 12.8 ppm/°F); temperature matching code: 3
  • Austenitic steel (16 ppm/K, 8.9 ppm/°F); temperature matching code: 5
  • Silica/composite (0,5 ppm/K; 0.3 ppm/°F); temperature matching code: 6
  • Titanium and gray cast iron (9 ppm/K; 5.0 ppm/°F); temperature matching code: 7
  • Plastic (65 ppm/K; 36.1 ppm/°F); temperature matching code: 8
  • Molybdenum (5.4 ppm/K; 3.0 ppm/°F); temperature matching code: 9

Insert the temperature matching code in place of the placeholder “x” to get the ordering number of the strain gauge you need. Strain gauges marked with a # symbol are only available matched to aluminum, ferritic and austenitic steel.

Save time and efforts: RY8 strain gauges are available as pre-wired versions with connection cable

Strain gauges available in 120 and 350 Ohms

Measuring grid consists of constantan, measuring grid carrier is polymide

Fast delivery for preferred strain gauge types -  available from stock! 

 

Ordering number 

Nominal (rated) resistance

Dimensions [mm/inch]

Solder terminals

Preferred types

Measuring grid

Carrier

[Ω]

a1

a2

b

c

d


 

1-RY1x-3/120#

120

0.8
0.031

3
0.118

0.8
0.031
7
0.276
7
0.276
LS71
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)
1-RY1x-6/120

120

2
0.079

6
0.236

1.4
0.055
11
0.433
11
0.433
LS51,3
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY1x-10/120

120

2.9
0.114

10
0.394

2.7
0.106
15.4
0.606
15.4
0.606
LS41
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

 

 

Ordering number

Nominal (rated) resistance

Dimensions [mm/inch]

Solder terminals are not compulsory

Preferred types

Measuring grid

Carrier

[Ω]

a1

a2

b

d

 

1-RY3x-3/120#

120

0.8
0.031

3
0.118

0.8
0.031

6.9
0.272

LS7

1

Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY3x-6/120

120

2
0.079

6
0.236

1.4
0.055

11
0.433

LS5

1,3

Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY3x-10/120

120

2.9
0.114

10
0.394

2.7
0.106

15.4
0.606

LS4

1

Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

 

 

Ordering number

Nominal (rated) resistance

Dimensions [mm/inch]

Solder terminals

 

 

Preferred types

Measuring grid

Carrier

[Ω]

a1

a2

b

c

d

 

1-RY4x-3/120#

120

0.8
0.031

3
0.118

0.8
0.031
7
0.276
7
0.276
LS7-
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY4x-6/120

120

2
0.079

6
0.236

1.4
0.055
11
0.433
11
0.433
LS51
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY4x-10/120

120

2.9
0.114

10
0.394

2.7
0.106
15.4
0.606
15.4
0.606
LS41
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)
 

Ordering number

Nominal (rated) resistance

Dimensions [mm/inch]

Solder terminals are not compulsory

Preferred types

Measuring grid

Carrier

[Ω]

a1

a2

b

d

 

1-RY7x-3/120#

120

0.8
0.031

3
0.118

0.8
0.031
6.9
0.272
LS7-
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY7x-6/120

120

2
0.078

6
0.236

1.4
0.055
11
0.433
LS5-
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY7x-10/120

120

2.9
0.114

10
0.394

2.7
0.106

15.5
0.606

LS4

-

Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

 

 

Ordering number

Nominal (rated) resistance

Dimensions [mm/inch]

Solder terminals are not compulsory

 

 

Preferred types

Measuring grid

Carrier

[Ω]

a

b

c

d

 

1-RY8x-0.6/120#

120

0.6
0.024

1.1
0.043
4.8
0.189
8.7
0.343
LS7-
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY8x-1.5/120  

120

1.5
0.059

1.2
0.047
8.2
0.323
14.6
0.575
LS71
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY8x-3/120

120

3
0.118

1.1
0.043
9.7
0.382
14.6
0.575
LS71,3
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY8x-6/120

120

6
0.236

3
0.118
13
0.512
22.9
0.902
LS71
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY8x-1.5/350#

350

1.5
0.059

1.6
0.063
8.2
0.323
14.6
0.575
LS7-
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY8x-3/350

350

3
0.118

1.2
0.047
9.7
0.382
14.6
0.575
LS7-
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY8x-6/350

350

6
0.236

2.8
0.11
13.1
0.516
22.9
0.902
LS51
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

 

 

Ordering number

Nominal (rated) resistance

Dimensions [mm/inch]

Solder terminals

 

 

Preferred types

Measuring grid

Carrier

[Ω]

a

b

c

d

 

1-RY9x-1.5/120

120

1.5
0.059

1.3
0.051
9
0.354
8
0.315
LS71
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY9x-3/120

120

3
0.118

1.3
0.051
9
0.354
9
0.354
LS71,3
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY9x-6/120   

120

6
0.236

2.6
0.102
12.5
0.492
11.4
0.449
LS71,3
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY9x-10/120

120

10
0.394

4
0.157
17.5
0.689
16
0.63
LS71
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY9x-1.5/350#

350

1.5
0.059

1.5
0.059
8
0.315
9
0.354
LS71
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY9x-3/350

350

3
0.118

1.5
0.059
9
0.354
9
0.354
LS7

1,3

Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY9x-6/350

350

6
0.236

2.6
0.102
12.5
0.492
11.4
0.449
LS71,3
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY9x-10/350

350

10
0.394

4
0.157

17.6
0.693

16
0.63

LS7

-

Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)
 

Ordering number

Nominal (rated) resistance

Dimensions [mm/inch]

Solder terminals

 

 

Preferred types

Measuring grid

Carrier

[Ω]

a

b

c

d

 

1-RY10x-1.5/120

120

1.5
0.059

1.4
0.055
8.2
0.323
13.5
0.531
LS7-
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY10x-3/120   

120

3
0.118

1.1
0.043
9.7
0.382
13.5
0.531
LS71, 3
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY10x-6/120  

120

6
0.236

3
0.118
16.4
0.646
22.9
0.902
LS4-
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)
1-RY10x-1.5/350#

350

1.5
0.059

1.4
0.055
8.2
0.3232
13.5
0.531
LS71,3
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY10x-3/350

350

3
0.118

1.2
0.047
9.7
0.382
13.5
0.531
LS71,3
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

1-RY10x-6/350

350

6
0.236

2.8
0.11
16.4
0.646
22.9
0.902
LS41,3,6
Steel (1) | Aluminum (3) | Austenitic Steel (5) | Silica / composite (6) | Titanium (7) | Plastic (8) | Molybdenum (9)

 

RY: 应变花,带有3个测量栅丝,用于未知主应力方向进行双轴应力应力分析

用于未知主应力方向进行双轴应力应力分析, 应变花 RY… 带有 3 个测量栅丝,呈 0°/45°/90° 排列(型号 RY1, RY3, RY8, RY9, RY10), 或 0°/60°/120° (型号 RY4, RY7).

3 个测量栅丝, 具有不同的几何尺寸,额定电阻为 120 和 350 ohms,具有不同的温度响应范围,适合用于钢,铝以及客户指定材料。

3 个测量栅丝均为 1/4 桥 电路。

提示:如何进行第一和第二主应力计算

应变花的 3 个测量栅丝采用a, b 和c 进行标识,响应产生 3个应变 εa, εb 和 εc。呈 0°/45°/90° 排列的应变花的主应力技术公式如下:

呈 0°/60°/120° 排列的为:

以下确定主应力方向。首先计算辅助角ψ的正切。 0°/45°/90° 应变花公式如下:

0°/60°/120° 应变花公式如下:

注意: 直角三角形的正切值为对边 (分子 N) 和相邻边 (分母 D) 的比:

在最终计算以上提及的商数前,确定 分子 (N) 和分母 (D) 是非常重要的。只有这样,才能确定是哪个象限的角度 ψ 。首先,从正切值确定中间角度 ψ:

角度 ϕ 计算使用以下等式:

Apply the angle ϕ that is found in this manner starting from the axis of the reference measuring grid a in a mathematically positive direction (counterclockwise). The axis of the measuring grid a forms one arm of the angle ϕ. The other arm represents the first principal direction. This is the direction of the principal normal stress σ1 (identical with the principal strain direction ε1). The point of the angle is located at the intersection of the measuring grid axes. The second principal direction (the direction of principal normal stress σ2) has the angle ϕ+90°.

测量栅丝为 康铜,基底材料为聚酰亚胺。

RY6/RY8应变片带有一个连接电缆! 这样解决方案有很多优势: 首先无需在测量点上焊接,电缆长度可以从 0.5 m 到 10 m, 可按需求配有 RJ11 插头。特氟龙电缆可以防止安装时被黏住,对您来说非常方便… !

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