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</html><thumbnail_url>https://www.istegroup.com/wp-content/uploads/2018/01/doc_wtcowncxovyy.jpg</thumbnail_url><thumbnail_width>988</thumbnail_width><thumbnail_height>1500</thumbnail_height><description>In recent years, there has been an increasing use of high-performance heterogeneous materials such as fibrous composites, concrete, metallic porous materials and metal alloys for their advantageous overall characteristics, which result in superior structural mechanical responses and service performance. Though from a structural point of view these materials can be considered homogeneous and conventional design [&hellip;]</description></oembed>
