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Core and panel types affect the mechanical properties and failure modes of the wood-based XX-type lattice sandwich structure
European Journal of Wood and Wood Products ( IF 2.6 ) Pub Date : 2021-01-03 , DOI: 10.1007/s00107-020-01635-5
Tengteng Zheng , Shuai Li , Qingyuan Xu , Yingcheng Hu

Composite lattice sandwich structures have the characteristics of light weight and high strength. In this study, a wood-based XX-type lattice sandwich structure was fabricated by a type of insertion-glue method, using wood-plastic composites (WPC) and oriented strand boards (OSB) as panels, and birch and glass-fiber reinforced plastic (GFRP) as cores. The mechanical properties and failure modes of the wood-based XX-type lattice sandwich structure were examined by an out-of-plane compressive test, a short beam shear test and their corresponding analytical models. Analytical models and failure modes were used to find the optimal mechanical properties of the wood-based XX-type lattice sandwich structure combination. The results from the out-of-plane compressive test and the analytical model showed that the failure modes of the combination of WPC + GFRP and OSB + GFRP were primarily panel failures, while the failure modes of the combination of WPC + birch and OSB + birch were primarily core shear failures. The specific strength and modulus of the structures built by the combination of OSB + GFRP were larger, which are more in line with their characteristics of light weight and strong strength. The short beam shear properties of the combination of OSB + birch were better, and the failure modes were lamination and core breakage. Thus, the overall short beam shear property of the combination of OSB + birch was better than that of the combination of WPC + GFRP, and the combination of OSB + birch was more suitable for the short beam shear theoretical model.



中文翻译:

芯和面板类型会影响木质XX型晶格三明治结构的力学性能和破坏模式

复合格子夹层结构具有重量轻,强度高的特点。在这项研究中,使用木塑复合材料(WPC)和定向刨花板(OSB)作为面板,以及桦木和玻璃纤维增​​强材料,通过一种插入胶方法,制造了一种木质XX型晶格三明治结构。塑料(GFRP)为核心。通过面外压缩试验,短梁剪切试验及其相应的解析模型,对木质XX型格构三明治结构的力学性能和破坏模式进行了研究。使用分析模型和破坏模式来找到木质XX型晶格三明治结构组合的最佳机械性能。面外压缩试验和分析模型的结果表明,WPC + GFRP和OSB + GFRP组合的失效模式主要是面板失效,而WPC +桦木和OSB +组合的失效模式主要是面板失效。桦树主要是岩心剪切破坏。OSB + GFRP组合而成的结构的比强度和模量较大,更符合重量轻,强度高的特点。OSB +桦木组合的短梁剪切性能较好,破坏模式为层合和岩心破裂。因此,OSB +桦木组合的整体短梁剪切性能要优于WPC + GFRP组合,而OSB +桦木的组合更适合短梁剪切理论模型。

更新日期:2021-01-03
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