Composite Applications Composite Processing October's top 3 Reinforced Plastics stories – Volvo XC90 leaf spring, 3D fabrics, aircraft repair News Amanda Jacob 05 Nov 2014 Top story: The rear axle of the new Volvo XC90 features a transverse leaf spring made of lightweight composite material. Volvo XC90 features polyurethane composite leaf spring; 3D non-crimp fabrics for composite structures; Patching up aircraft, the composites way (Part 2).