Composite materials are increasingly popular. One of the primary composite materials for modern structures is glass fiber reinforced plastic (GFRP), which is commonly used in aviation, modern transport and wind power plants. Scientists of South Ural State University have carried out extensive studies of ballistic properties of GFRP to improve the efficiency of its use.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/the-properties-of-composites-for-constructing-reliable-trains