循环载荷对压实雪冰抗压强度的影响研究

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循环载荷对压实雪冰抗压强度的影响研究

洪嘉琳¹^,²(

), 焦凤琪¹, 应咏翰¹, 李金奇¹, 王义超¹, 邵也¹, 范晓鹏²^,³^,⁴(

)

The effect of cyclic loading on the compressive strength of compacted snow

Jialin HONG¹^,²(

), Fengqi JIAO¹, Yonghan YING¹, Jinqi LI¹, Yichao WANG¹, Ye SHAO¹, Xiaopeng FAN²^,³^,⁴(

)

图5. 不同循环次数下压实雪冰在循环载荷下的单轴抗压强度
注：实验温度为（-10.0±0.3） ℃，A为应力幅值，f为频率， $ε ˙$ 为应变速率， $σ m$ 为平均应力，N为循环次数；图中灰色虚线为相同应变速率条件下单调载荷条件下所获得的抗压强度；黑色虚线与红色虚线分别为应力幅值在1.0 MPa和0.5 MPa条件下，表征循环载荷作用下的单轴抗压强度与循环次数间的线性关系拟合线

Fig. 5. Uniaxial compressive strength of compacted snow under cyclic load at different cycles
The experimental temperature is （-10.0±0.3） ℃，A is the stress amplitude，f is the frequency， $ε$ is the strain rate， $σ m$ is the average stress，N is the number of cycles；The grey dotted line in the figure is the compressive strength obtained under monotonic loading at the same strain rate；the black dotted line and the red dotted line are the fitting lines of the linear relationship between the uniaxial compressive strength and the number of cycles under the cyclic loading when the stress amplitude is 1.0 MPa and 0.5 MPa，respectively