AM.I.K.S8
SkillPerform a tap test on a composite component.
From the FAA library
- Chapter 7: Advanced Composite Materials › Solid Laminates › Bonded Flush Patch Repairs
Scarf repairs of composite laminates are performed in the sequence of steps described below. Step 1: Inspection & Mapping of Damage The size and depth of damage to be repaired must be accurately surveyed using appropriate nondestructive evaluation (NDE) techniques ... variety of NDE techniques can be used to inspect for damage in composite structures. The simplest technique is visual inspection, in which whitening due to delamination and/or resin cracking can be used to indicate the damage area in semitransparent composites…
- Chapter 10: Inspection Concepts & Techniques › Inspection of Composites › Tap Testing
Tap Testing Tap testing, also referred to as the ring test or coin test, is widely used as a quick evaluation of any accessible surface to detect the presence of delamination or debonding. The testing procedure consists of lightly tapping ... compared to that of a known good area. A “flat” or “dead” response indicates an area of concern. Tap testing is limited to finding defects in relatively thin skins, less than 0.080" thick. On honeycomb structures, both sides need…
- Chapter 7: Advanced Composite Materials › Nondestructive Inspection (NDI) of Composites › Audible Sonic Testing (Coin Tapping)
Visual inspection cannot find internal flaws in the composite, such as delaminations, disbonds, and matrix crazing. More sophisticated NDI techniques are needed to detect these types of defects. Figure 7-23. Corrosion of aluminum lightning protection mesh. Audible Sonic Testing ... Coin Tapping) Sometimes referred to as audio, sonic, or coin tap, this technique makes use of frequencies in the audible range (10 Hz to 20 Hz). A surprisingly accurate method in the hands of experienced personnel, tap testing is perhaps…