Abstract
Abstract This paper describes the definitions and differences of the computational methods of virial stress and engineering stress in nano-scale problems. According to simulation results of tensile testing of a single-crystalline nano-scale copper bar, the average stresses in a cross-section of the copper bar, calculated with different methods, are compared. The values and distributions of local tensile stresses reveal further insights into these two methods. The advantages and disadvantages of these two methods are also discussed in detail.
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