Abstract
We present a novel method for fabricating carbon fiber composite sandwich panels with lattice core construction by means of electrical discharge machining (EDM). First, flat-top corrugated carbon fiber composite cores were fabricated by a hot press molding method. Then, two composite face sheets were bonded to each corrugated core to create precursor sandwich panels. These panels were transformed into sandwich panels with near-pyramidal truss cores by EDM plunge-cutting the corrugated core between the face sheets with a shaped cuprite electrode. The flat top corrugation permits adhesive to be applied consistently, and the selected dimensions leave a substantial bond area after cutting, resulting in a strong core-to-sheet bond. The crushing behavior of this novel construction was investigated in flatwise compression, and the results were compared to analytical expressions for strength and stiffness.
| Original language | English |
|---|---|
| Pages (from-to) | 405-412 |
| Number of pages | 8 |
| Journal | Experimental Mechanics |
| Volume | 54 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2014 |
Keywords
- Carbon fiber
- Electrical Discharge Machining
- Lattice structures
- Mechanical properties
- Sandwich panel
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