Residual Clamping Force Estimation and Lifetime Prediction to Loosening Failure of Bolted Joints

2017-01-0479

03/28/2017

Features
Event
WCX™ 17: SAE World Congress Experience
Authors Abstract
Content
This investigation describes a method for estimating the absolute lock effect in bolted joint. Observation results of loosening phenomenon in industrial vehicle are analyzed for the linear relation by the proposed regression formula. Based on the relation, in early stages of the development test, the rate of clamping force decrease can be estimated accurately after prolonged operation by measuring the clamping force behavior. The tendency to decrease is observed about the depression type and working load type loosening. For evaluation design bases, the residual clamping force estimation chart is established. The L-N (Loosening Lifetime - Number of Cycles to Loosening N) diagram is proposed for the loosening lifetime prediction for working load type loosening also. Using the loosening damage (cumulative decrease of clamping force) and L-N diagram, the lifetime to loosening failure can be predicted accurately for the locking device and method as an absolute evaluation.
Meta TagsDetails
DOI
https://doi.org/10.4271/2017-01-0479
Pages
12
Citation
Hareyama, S., Manabe, K., Nakashima, M., Shimodaira, T. et al., "Residual Clamping Force Estimation and Lifetime Prediction to Loosening Failure of Bolted Joints," SAE Technical Paper 2017-01-0479, 2017, https://doi.org/10.4271/2017-01-0479.
Additional Details
Publisher
Published
Mar 28, 2017
Product Code
2017-01-0479
Content Type
Technical Paper
Language
English