文献类型：期刊文献

英文题名：Anomalous pore evolution and energy absorption mechanisms in wood radial compression: Insights from a comparative study of four species under variable temperatures

作者：Li, Mingyue[1] Ren, Haiqing[1]

第一作者：Li, Mingyue

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, China

年份：2026

卷号：518

外文期刊名：Construction and Building Materials

收录：EI(收录号：20260920174093)

语种：英文

外文关键词：Hardwoods - Mechanical testing - Structural properties

摘要：The radial compression behavior of wood, governed by its multiscale structure and chemical composition, is profoundly affected by temperature. This comparative study of four wood species combines mechanical testing with microstructural analysis to elucidate the species-specific mechanisms underlying their compressive performance. Results demonstrate that energy absorption efficiency is optimized in structures with large lumens and moderate wall thickness, enabling progressive collapse. Hemicellulose enhances plastic deformation and recovery, whereas lignin facilitates permanent damage. A fundamental divergence in thermal response was identified: softwoods resist deformation by maintaining crystallinity until 300°C, whereas hardwoods degrade earlier. Notably, we report a unique pore evolution pathway in Larch, which exhibits a substantial increase in porosity post-compression at 300°C, deviating from the typical densification behavior. This work establishes structure-property-deformation relationships that are vital for the advanced application of wood under thermo-mechanical conditions. ? 2026 Elsevier Ltd.