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요약정보
滚动接触下裂纹充液行为研究 / Investigation of Fluid Filled Behaviour of Cracks under Rolling Contacts
Resource Type
Academic Journal
Authors
董龙龙
;
俞树荣
;
李淑欣
;
宋伟
;
DONG Longlong
;
YU Shurong
;
LI Shuxin
;
SONG Wei
Source
中国机械工程 / China Mechanical Engineering
. 33(10):1210-1218
Subject
液体增压
裂纹扩展
应力强度因子
腔体密封
自密封
Language
Chinese
ISSN
1004-132X
Online Access
Scopus
Find it @ DONGA
초록
为研究液体渗入裂纹后裂纹的演变过程,建立了滚动接触圆盘-平面裂纹充液二维模型.裂纹表面与圆盘-平面接触面组成腔体结构,圆盘的运动使裂纹表面发生变形、腔体体积减小从而导致腔体内压力增大,最终表面裂纹在腔体高压作用下加速扩展.基于表面裂纹接触状态的变化,研究腔体形成、密封和泄漏三个阶段裂纹应力强度因子曲线及扩展方向的演变.结果表明,腔体内部压力小于裂口接触位置最大压力,液体增压效应随裂纹几何尺寸的增加显著增强,增加裂纹长度与裂口宽度使裂纹扩展模式从Ⅱ型转为Ⅰ型;随着裂纹扩展,腔体内部的液体泄漏使腔体产生动态自密封-泄漏现象.
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