采用分子静力学结合量子修正Sutten-Chen型多体势研究了Ni单晶体在受单向拉伸和压缩载荷作用下的弹性响应.考虑了三种加载方式,即[001],[011]和[111]单向加载.模拟的结果表明:晶体在[011]单向加载下的弹性变形表现出强烈的非线性效应,然而沿[001]和[111]单向加载时,它的横向变形表现为各向同性.进一步讨论了杨氏模量和泊松比与应变的关系,并和第一性原理计算的结果做了比较. The elastic response of Ni single crystal under uniaxial tension and compressive loading was investigated by using molecular static mechanics combined with the Sutten-Chen multi-body potential with quantum correction. Three loading methods, namely [001], [011] and [ 111]. The simulation results show that the elastic deformation under the uniaxial loading of [011] shows a strong nonlinear effect. However, the transverse deformation of [001] and [111] Are isotropic.The relationship between Young’s modulus and Poisson’s ratio and strain is further discussed and compared with the results of first-principles calculation.