7781 E-glass Fabric (Clark-Schwebel) glass fibre in a PR 381 (3M) epoxy matrix. Glass/epoxy is the workhorse of secondary aircraft structure and tooling: far cheaper than carbon, electrically transparent, and tolerant of impact and handling damage. It is chosen where stiffness-per-pound is not the governing requirement — radomes and antenna windows, fairings and access panels, lay-up tooling, and marine and industrial laminates. per MIL-C-9084C Type Vlll B, Yarn DE-75, no surface treatment.
Compliance & Regulations
Fiber Direction
Ply Schedule
Laminate Code
[0/0/0/0/0]T
Fiber angles relative to the 0° reference direction (red arrow in 3D view). 0° = longitudinal, 90° = transverse, ±45° = shear paths.
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf)2 entries | 1.780 range 1.520–1.960 | - | 23°C · RTA · 1-axis · [0:f]:5 · as-measured | ||
| ↳ | 1.960 range 1.840–2.110 | - | 104°C · ETA · 1-axis · [0:f]:5 · as-measured | ||
Flexural Strength (MOR)(σf)2 entries | 109 range 94.20–121n=21, 5 batches, CV 7.52% | ksi | 23°C · RTA · [0:f]:5 · as-measured | ||
| ↳ | 93.20 range 83.40–104n=14, 4 batches, CV 8.15% | ksi | 104°C · ETA · [0:f]:5 · as-measured | ||
Interlaminar Shear Strength(ILSS) | 10.40 range 9.600–11.50n=22, 5 batches, CV 4.8% | ksi | 23°C · RTA · 13-axis · [0:f]:5 · as-measured | ||
Ultimate Tensile Strength(σUTS)4 entries | 74.90 range 70.40–79.60n=16, 5 batches, CV 3.66% | ksi | 23°C · RTA · 1-axis · [0:f]:5 · norm. thk+FAW | ||
| ↳ | 70.90 range 62.90–77.80n=16, 5 batches, CV 7.07% | ksi | 23°C · RTA · 1-axis · [0:f]:5 · as-measured | ||
| ↳ | 71.30 range 67.00–77.40n=13, 4 batches, CV 4.02% | ksi | 104°C · ETA · 1-axis · [0:f]:5 · norm. thk+FAW | ||
| ↳ | 67.50 range 60.50–74.40n=13, 4 batches, CV 5.89% | ksi | 104°C · ETA · 1-axis · [0:f]:5 · as-measured | ||
Young's Modulus(E)4 entries | 3,830 range 3,700–3,970n=15, 5 batches, CV 2.63% | ksi | 23°C · RTA · 1-axis · [0:f]:5 · norm. thk+FAW | ||
| ↳ | 3,640 range 3,370–3,960n=15, 5 batches, CV 4.51% | ksi | 23°C · RTA · 1-axis · [0:f]:5 · as-measured | ||
| ↳ | 3,640 range 3,450–3,750n=13, 4 batches, CV 2.78% | ksi | 104°C · ETA · 1-axis · [0:f]:5 · norm. thk+FAW | ||
| ↳ | 3,440 range 3,240–3,770n=13, 4 batches, CV 5.4% | ksi | 104°C · ETA · 1-axis · [0:f]:5 · as-measured |