Strength and features of fracture of fiberglass-reinforced plastics in the 77–400 K temperature range

Conclusion

• 1. The strength and elastic characteristics of fiberglass laminate with a silicone binder were determined and the rules of their change under single and repeated temperature action were established.

• 2. It was shown that in tension and compression in the 77–400 K temperature range fracture of the material occurs both as the result of development of microcracks existing in the original structure of the material and preferentially oriented in planes perpendicular to the plane of the reinforcing fabric and as the result of development of defects at the interface of the components in the planes of reinforcing.

• 3. It was established that with a reduction in temperature the contribution to the fracture process of defects (cracks) developing at the interface of the components increases, as the result of which under low temperature conditions fracture of the material both in tension and in compression is initiated by separation of it.