铁道标准设计2018，Vol.62Issue(2)：44-48,5.DOI:10.13238/j.issn.1004-2954.201704100008
螺纹道钉抗拔力对再生塑性复合轨枕的影响分析
The Effect of the Screw Spike Anti-pullout Force on Recycled Plastic Composite Crosstie
摘要
Abstract
Recycled plastic composite crosstie is a new type of crosstie.This paper aims to analyze the effect of screw spike pullout force on the crosstie and obtain the true stress and strain curve line based on the axial tension experiment data.The screw spike applicable to wood crosstie is used.The composite crosstie is assumed to be isotropic and rate independent and in good contact with the spike,and quarter finite element models of screw spike and crosstie are established.The pullout force is calculated in terms of the rotation of the rail under lateral force,and the force on the top of screw spike is applied to analyze the crosstie displacement,the stress and strain during the process of pulling screw spike out of the crosstie.The results show that the pullout force has an effect on the whole width of the crosstie.The stresses of crosstie elements which are close to the screw spike bottom and threads are comparatively larger,and these regions are prone to failure at the same time.Increasing the pullout force may lead to a plastic region at the end of the screw and result in failure.关键词
再生塑性复合轨枕/螺纹道钉/抗拔力Key words
Recycled plastic composite crosstie/Screw spike/Pullout force分类
交通工程引用本文复制引用
段海滨,耿浩,李成辉..螺纹道钉抗拔力对再生塑性复合轨枕的影响分析[J].铁道标准设计,2018,62(2):44-48,5.基金项目
国家自然科学基金(51278431) （51278431）
