亳县陨石物理力学性质的实验研究

本文对亳县陨石的物理力学特性进行了多种实验方法的探讨。在MTS伺服控制材料试验机上测得了陨石的全程应力—应变曲线。同时,通过单轴压缩试验确定了抗压强度、弹性模量和泊松比,并运用频谱振幅比法对应力波衰减特性进行了研究,给出了品质因子。此外,还采用脉冲法给出了弹性波速度;液体浸透法给出了密度和孔隙度。文中还将亳县陨石的测试结果与其它陨石物理力学参数进行了比较分析。最后,还根据亳县陨石与岩石物理力学性质的对比,推演出亳县陨石在其母体所处的环境类似于地球上地幔的顶部。

Experimental Study on Physical- Mechanical Behaviours of Boxian Meteorite

The physical-mechanical behaviours of Boxian meteorite have been studied by means of varied experimental techniques. The whole stress-strain curve of the meteorite is drawn on a MTS servo-controlled testing machine, and the compressive strength, elastic modulus and Poison's ratio are determined as well by way of uniaxial compression. The attenuation properties of stress wave are also investigated with the aid of the pulse transmission-amplitude ratio method,and this then gives the quality factor. In addition, the elastic wave speed and the density and porosity are obtained by using pulse method and liquid-soaking method respectively.Finally, a special analysis with discussion is given concerning the relationships between experimental results of Boxian meteorite and physical-mechanical behaviours of other meteorites or rocks in the earth. It is rather ready to point out that the surroundings of Boxian meteorite in its parent body is Similar to the environment at the top of the upper mantle. It could therefore be deduced that Boxian meteorite was located some 20km beneath the surface of the parent body before separation.