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The particle surface roughness which determined by the energetic materials surface morphology has greatly impact on thermal conductivity of multiple particles, which directly affect its sensitivity. But since the surface morphology is extremely irregular,it is difficult to describe the roughness accurately quantitatively using traditional methods. To solve this problem, the concept of surface fractal dimension based on fractal theory is given to describe the roughness in this paper.Choosing the particles of HMX and RDX as studying object, and the functions of MATLAB in image processing and numerical calculation were employed to get the surface fractal dimension of 2.794 and 2.772 respectively. A contrast experiment has been carried on between the calculation results of this method and the literature results. The results show that the calculation method is accurate and reliable, and the relative error is 0.106% and 1.042% respectively, the surface fractal dimension of HMX and RDX is 2.794 and 2.772 respectively. Keywords-energetic materials; surface fractal dimension; MATLAB; images; friction sensitivity

Estimation of Surface Fractal Dimension of Energetic Materials Based on MATLAB