STRESS INTENSITY FACTOR ESTIMATION FOR A CRACK EMANATING FROM AN ACME THREADED BOLT

摘要：

Acme threads are widely used in power screws and screw jack applications.The mixed mode fracture behavior of 3D cracks in Acme threaded bolt depends on crack tip stress fields.Available solutions of Stress Intensity Factor (S1F) for threaded bolt are obtained by considering the bolt as a grooved round bar.This paper presents the SIF results of Acme threaded bolt taking into consideration of helix angle.Aspect ratios in the range of (0.2 < (a/c) <1) and crack depth ratios in the range of (0.1 < (a/d) <0.5) are considered along the crack plane for the SIF estimation.In the absence of helix angle, only mode-I fracture dominates along the crack front.With consideration of helix angle, mixed mode crack propagation occurs.The influence of mode-II and modeIll fracture is negligible in the crack front middle region.In the surface region, up to a diameter ratio of 0.2, significant influence of helix angle was observed.

关键词： Stress intensity factor Helix angle Collapsible singular elements Mixed mode fracture

作者: S.SURESH KUMAR RAGHU V.PRAKASH

作者单位: Department of Mechanical Engineering Indian Institute of Technology Chennai 600036,India

会议类型: 国际会议

会议名称: 3rd International Conference on Mechanical and Electrical Technology(ICMET2011) (2011第三届机械与电气技术国际会议)

会议地点: 大连

会议语种:英文

页码: 529-534

在线出版日期: 2011-08-26（万方平台首次上网日期，不代表论文的发表时间）