Compact Tension Grips
These compact tension grips are designed for plane-strain fracture toughness tests of metallic materials. Fracture toughness testing involves applying static loads to a notched sample to investigate brittle crack propagation and fracture conditions.
Compact tension grip sets include upper and lower grips and two 12 mm (0.47 in) diameter pins. The grips have a maximum capacity of 50 kN (11,000 lbf) and are available with three fitting sizes to directly couple with 50 kN, 100 kN and 300 kN load cells. In addition, a crack-opening displacement gauge is available to support the evaluation of crack propagation.
Relevant Materials
Metals
Relevant Specimens
Plates
Relevant Standards
ASTM E399
Operation
The fracture toughness samples are fixed to the grips using a clevis pin. The fracture toughness specimen is inserted into the grip opening and aligned with the grip’s pin holes. The clevis pins are inserted through the specimen and retained with a cotter pin on both ends. An optional crack-opening displacement gauge can be paired with these grips to measure displacement.
Crack-opening displacement gauge
Pins are inserted through the grip-specimen-grip
Clips avoid drop out of the pins
Specifications
| Maximum Grip Capacity | Applicable Specimen Thickness | Pin Diameter | Temperature Range | Grip Size | Upper Grip Mass | Upper Grip Ø Fitting (Ø pin) |
Lower Grip Ø Fitting (Ø pin)
|
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|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Width |
Length
|
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| kN | kgf | lbf | mm (in) | mm (in) | °C (°F) | mm (in) | mm (in) | kg (lb) | mm | mm | ||
| 50 kN Compact Tension Grips for 250 kN Load Cells | ||||||||||||
| 50 | 5,000 | 11,000 | 25.4 (1.0) |
12 (0.47) |
-10 to 60 (14 to 140) |
65 (2.6) |
180 (7.1) |
2.4 (5.3) |
70 (35) |
70 (35) |
||
| 50 kN Compact Tension Grips for 100 kN Load Cells | ||||||||||||
| 50 | 5,000 | 11,000 | 25.4 (1.0) |
12 (0.47) |
-10 to 60 (14 to 140) |
65 (2.6) |
160 (6.3) |
2.4 (5.3) |
50 (17.5) |
50 (17.5) |
||
| 50 kN Compact Tension Grips for 50 kN Load Cells | ||||||||||||
| 50 | 5,000 | 11,000 | 25.4 (1.0) |
12 (0.47) |
-10 to 60 (14 to 140) |
65 (2.6) |
150 (5.9) |
2.4 (5.3) |
35 (13) |
35 (13) |
||
Ordering Information
| Part Number | Description |
|---|---|
| Compact Tension Grip Sets Includes: upper and lower compact tension grips |
|
| 343-07385-08 | 50 kN compact tension grip set for 250 and 300 kN load cells |
| 343-07385-04 | 50 kN compact tension grip set for 100 kN load cells |
| 343-07385-03 | 50 kN compact tension grip set for 50 kN load cells |
| Accessories | |
| 343-08984-01 | Crack-opening displacement gauge for compact tension grips |