椰子壳的力学性能试验研究

Experimental Study on Mechanical Properties of Coconut Shell

椰子壳作为一种天然高聚物,具有强度高、不易腐烂、绿色环保等优点,可用作填海造地的吹填料。通过开展椰子壳材料力学性能试验,研究椰子壳轴向荷载作用下的变形、应力-应变关系、伸长率等力学性能,分析加载方向、加载速度和椰壳干湿状态对其力学性能的影响。结果表明:椰壳在竖向荷载作用下,其竖向变形与荷载增长近似成线性关系,其破坏形式表现为脆性破坏;长轴方向的极限抗压强度较短轴大,干椰壳强度大于湿状态的强度,椰壳强度随着加载速度的增加而增大。

s a kind of natural high polymer, coconut shell can be used as the blowing fillers in marine reclamation land for its high strength, strong durability and environment friendliness. Material-mechanical property test of the coconut shell was performed to investigate the deformation, the relation between stress and strain and elongation percentage of coconut shell under axial load. The influences of loading direction, loading rate and dry and wet state of the coconut shell on its mechanical property were also analyzed. The results show that the vertical deformation approximately increases linearly with the load growth under the vertical load and its failure mode has the characteristics of brittle failure. The ultimate compressive strength of long axis is larger than that of short axis; the compressive strength of the dry coconut shell is larger than that of the humid coconut shell; and the strength of coconut shell grows with the increase of loading rate.