论文标题
压缩灰尘样品的拉伸强度以及行星前物质的灾难性破坏阈值
The tensile strength of compressed dust samples and the catastrophic disruption threshold of pre-planetary matter
论文作者
论文摘要
在行星形成过程中，行星可能发生的相互碰撞发生，从而影响了它们的孔隙率的演变。这些碰撞的结果取决于其他参数，取决于碰撞物体的拉伸强度。在这项工作的第一阶段，我们将冲击实验进行了尘埃样本，并用类似于原始太阳系的材料组装，以获得高度压缩的样品，这些样品代表了在软骨陨石中测得的孔隙度。在第二阶段，我们通过巴西磁盘测试获得了压缩灰尘样品的拉伸强度。我们发现拉伸强度与压缩灰尘样品的体积填充因子之间存在相关性，并在相互碰撞中获得了相应的临界碎片强度及其对体积填充因子的依赖。最后，我们为灾难性破坏阈值作为对象大小的函数提供了处方，对于在碰撞模型中可以使用的体积填充因子的不同值。
During the planetary formation process, mutual collisions among planetesimals take place, making an impact on their porosity evolution. The outcome of these collisions depends, among other parameters, on the tensile strength of the colliding objects. In the first stage of this work, we performed impact experiments into dust samples, assembled with material analogous to that of the primitive Solar System, to obtain highly compressed samples that represent the porosities measured in chondritic meteorites. In the second stage, we obtained the tensile strengths of the compressed dust samples by the Brazilian Disk Test. We found a correlation between the tensile strength and the volume filling factor of the compressed dust samples and obtained the corresponding critical fragmentation strength in mutual collisions and its dependence on the volume filling factor. Finally, we give prescriptions for the catastrophic disruption threshold as a function of the object size, for different values of the volume filling factor that can be utilized in collisional models.
