Self-organized mycelium biocomposites: Effects of geometry and laterite composition on compressive behavior
Self-organized mycelium biocomposites: Effects of geometry and laterite composition on compressive behavior
复制标题
自组织菌丝体生物复合材料：几何形状和红土成分对压缩行为的影响
DOI：
10.1016/j.jmbbm.2023.105831
复制
发表时间：
2023
影响因子：
3.9
通讯作者：
Soboyejo, Winston O.
中科院分区：
文献类型：
--
作者：
Etinosa, Precious O.;Salifu, Ali A.;Azeko, Salifu T.;Obayemi, John D.;Onche, Emmanuel O.;Aina, Toyin;Soboyejo, Winston O.
研究了红土颗粒增强生物加工菌丝生物复合材料的压缩变形及结构结构对其抗压强度的影响。在菌丝块中，木质纤维素的麻絮起着增强和营养基质的作用。菌丝体作为支撑基质，将麻秆和红土颗粒结合在一起，进一步增强，提高复合材料的抗压强度。采用实验和理论研究相结合的方法阐明了复合材料的压缩行为。通过对试件在单轴压缩载荷作用下的现场观察，探讨了其变形机理。实验结果表明，细长试件的压缩变形导致渐进式微屈曲，而较厚试件在小应变水平下表现为软弹性响应，在大应变水平下表现为连续变硬。在实验观察和形态表征的基础上，对菌丝-麻复合材料进行了柱屈曲分析，进一步解释了观察到的变形现象。
This study investigates the compressive deformation and the effect of structural architecture on the compressive strength of bioprocessed mycelium biocomposites reinforced with laterite particles. In the mycelium blocks, lignocellulosic hemp hurds function as reinforcing and nutritional substrates. The mycelium acts as a supportive matrix, binding the hemp hurds and the laterite particles which are integrated for further reinforcement to improve the compressive strength of the composite. The compressive behavior of the composites is elucidated using a combined approach of experimental and theoretical studies. The deformation mechanisms are investigated via in-situ observations of the specimens under uniaxial compressive loading. The experiments show that the compressive deformation results in progressive micro-buckling in slender specimens, whereas thicker samples exhibit a soft elastic response at small strain levels followed by continuous stiffening at larger strains. Based on the experimental observations and the morphological characterization, a column buckling analysis was developed for the mycelium-hemp composites to further explain the observed deformation phenomena.