Glass‑fiber‑reinforced polymer (GFRP) is the most widely used subset of FRP composites. It combines E‑glass or, less frequently, S‑glass or AR‑glass fibres with a thermosetting polymer matrix — predominantly isophthalic polyester, vinyl ester, or epoxy. The material is characterised by a density of approximately 1.8–2.0 g/cm³, a tensile strength in the fibre direction typically between 200 MPa and 350 MPa, and an elastic modulus of 40–60 GPa. Its dielectric strength, frequently exceeding 10 kV/mm, makes GFRP the default choice for electrically insulating structural components.
For a precise definition and the boundaries of the term GFRP, see:
Detailed mechanical and physical property tables are located on the material data pages:
- GFRP Material Data – E‑glass mechanical properties
- FRP Material Characteristics – Cross‑reference with basalt variants
The Wikipedia entry on glass‑fiber‑reinforced polymer provides supplementary historical and scientific context.