作　　者： ; ; (卢立新）; (王军）;

机构地区： 江南大学

出　　处： 《包装工程》 2015年第5期59-63,共5页

摘　　要： 目的通过疲劳压缩实验,建立蜂窝纸板疲劳累积损伤模型。方法首先对蜂窝纸板进行一定的预压缩,然后进行不同次数疲劳压缩试验,最后将疲劳试样进行准静态压缩。结果随着压缩次数的增加,纸板的承载能力、平台应力均有所降低;蜂窝纸板的屈服应力尖峰消失;应力-应变曲线变为3个阶段,即线弹性阶段、平台阶段和密实化阶段;当压缩次数在30 000次左右时平台应力下降比较大,在30 000~50 000次时,下降比较小,之后微弱变化。结论蜂窝纸板疲劳压缩后平台应力会发生变化,呈现出先剧烈后微弱降低;选取剩余平台应力为损伤参量,结合损伤累积方法建立了蜂窝纸板疲劳累积损伤模型。 To establish a fatigue cumulative damage model for honeycomb paperboard through fatigue compression tests. First, the honeycomb paperboard was subjected to a certain degree of pre-compression, and then different number of fatigue compression tests were conducted, and finally the fatigue specimens were subjected to quasi-static compression.With the increasing number of compression, the loading capacity of the paperboard and the plateau stress were both decreased. The initial yield peak stress of the honeycomb paperboard disappeared. The stress-strain curve had three stages,including the elastic, plateau and densification stages. The plateau stress was sensitive to FD at about 30 000 cycles, but FD had relatively weaker effect on plateau stress from 30 000 to 50 000 cycles, and after that there was only slight change. The plateau stress was changed after fatigue compression of the honeycomb paperboard, and it displayed a trend of first dramatic and then slight decrease. Selecting residue plateau stress was as parametric stress injury, and combining with the fatigue damage accumulation method, the fatigue cumulative damage model for honeycomb paperboard was built.

关 键 词： 蜂窝纸板 疲劳压缩 平台应力 损伤模型

领　　域： [一般工业技术] [一般工业技术]