Investigation of mechanical properties of twin gold crystal nanowires under uniaxial load by molecul

• 作 者: 张国伟 杨在林 罗刚
• 机 构: College of Aerospace and Civil Engineering, Harbin Engineering University,
• 出 处: Chinese Physics B
• 发表日期: 2016年08期
• 关键词: compressive tensile length spacing modulus uniaxial hardly broken affects disloc

Twin gold crystal nanowires, whose loading direction is parallel to the twin boundary orientation, are simulated.We calculate the nanowires under tensile or compressive loads, different length nanowires, and different twin boundary nanowires respectively. The Young modulus of nanowires under compressive load is about twice that under tensile load.The compressive properties of twin gold nanowires are superior to their tensile properties. For different length nanowires,there is a critical value of length with respect to the mechanical properties. When the length of nanowire is greater than the critical value, its mechanical properties are sensitive to length. The twin boundary spacing hardly affects the mechanical properties.

Twin gold crystal nanowires, whose loading direction is parallel to the twin boundary orientation, are simulated. We calculate the nanowires under tensile or compressive loads, different length nanowires, and different twin boundary nanowires respectively. The Young modulus of nanowires under compressive load is about twice that under tensile load. compressible properties of twin gold nanowires are superior to their tensile properties. For different length nanowires, there is a critical value of length with respect to the mechanical properties. When the length of nanowire is greater than the critical value , its mechanical properties are sensitive to length. The twin boundary stresses hardly affects the mechanical properties.