SCALING AND MULTIFRACTAL CHARACTER OF MATRIX CRACKING IN CARBON FIBRE-REINFORCED CROSS-PLY LAMINATES

SUMMARY

The paper presents the interpretation of the experimental data on the matrix cracking in the carbon fibre-reinforced epoxy laminates under tensile cyclic loading. The conception of the characteristic damage state is verified in terms of the temporal scaling of matrix cracking. Additional information on the character of the cracks' distribution along the axis of the specimen is obtained by utilization of the concept of multifractals. The proposed procedure of the experimental data treatment is applied for the various loading histories and composite structures (stacking order). The ways of the utilization of obtained characteristics in mechanical models of matrix cracking is discussed.     

深水海洋气泡流的动力学模型

介绍了深水条件下海洋气泡流的动力学模型,阐述了天然气水合物在天然气从深海到大气的传输过程中的重要作用。被天然气水合物包裹的气泡的动力学模型是在普通气泡模型的基础之上,引入一个参数值,通过模型模拟得到的数据确定的,可以用来描述水合物外层对气体分子和水分子扩散的抑制作用。