Dynamic Cut Through
Physical FOR: Insulation $2,660One of the most common means for damage to a wire/cable on an aircraft is when the wire/cable is crushed. This may happen by a misaligned LRU, accidental contact by maintenance, or any other way that a wire/cable may be pinched when in-service. A wire/cable’s ability to withstand compression damage, particularly at elevated temperatures, will likely correspond to fewer physical damage-related issues.
The dynamic cut-through test is designed to assess the cut-through force of a wire/cable specimen. The wire/cable specimen is compressed under the fine edge of a jig until contact is made between the wire/cable conductor and the test jig. The pass/fail criteria for this test is based on the wire/cable’s specification.
The following parameters can be adjusted in this test:
- Compression Speed
- Test Temperature
- Cutting Jig
Procedure
- Perform visual examination of the specimen. Record any damage or defects.
- Place specimen into dynamic cut-through test stand, connect specimen to the detection circuit, and seal the enclosure.
- Raise the temperature of the enclosure to target temperature. The test shall begin five minutes after the target temperature has been stabilized.
- Begin compression of the specimen; the test will halt once contact is made between the conductor and test jig.
- Perform ten more trials on the specimen.
- Report the cut-through force and test temperature.
Covered specifications
- AS4373 Method 703
- AS22759 Paragraph 5.7.13
- ASTM 3032 Method 22
- BSS7324 Method 7.23
- EN3475 Method 501
- EN6059 Method 405
- ISO 6722 Method 5.8
- EN50305 Method 5.6
- MIL-W-81822 Method 4.6.23
- SS7614 Method 4.7.7