Effect of material properties on optimal radial strain gage locations in sharp V-notched configurations

Pranjol Paul,Debabrata Chakraborty,K.S.R Krishna Murthy

doi:10.1051/matecconf/201817203002

Pranjol Paul, Debabrata Chakraborty + Show 1 more

Open Access

https://doi.org/10.1051/matecconf/201817203002

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Abstract

A simple yet reliable and powerful methodology using only one strain gage has been recommended for appropriate determination of notch stress intensity factor (NSIF) for sharp V-notched configurations subjected to mode I condition. The methodology is supported by strong theoretical postulates, and it permits the gage to be pasted prominently apart from tip of the notch thus avoiding various problems associated with singularities. Unlike the conventional methodologies, the recommended strain gage methodology also proposes optimal radial strain gage locations which are beneficial in appropriate determination of NSIFs. A FEM based numerical approach is adopted for obtaining optimal radial gage locationsa priorifor the aforesaid configuration. The optimal radial gage locations are observed to be influenced by parameters viz. the notch angle, the ratio of notch length to width of the plate and also material properties. Results were already published by the authors to establish that the optimal radial gage locations are influenced by the notch angle and the ratio of notch length to width of the plate. In this conference paper, a case is studied with a completely different material to check whether material properties influence the graphical trends of results or not.

Highlights

IntroductionWe may often come across stress raisers such as sharp V-notches, rounded tip Vnotches and re-entrant corners
In engineering components, we may often come across stress raisers such as sharp V-notches, rounded tip Vnotches and re-entrant corners
A simple yet reliable and powerful methodology using only one strain gage has been recommended for appropriate determination of notch stress intensity factor (NSIF) for sharp V-notched configurations subjected to mode I condition

Summary

Introduction

We may often come across stress raisers such as sharp V-notches, rounded tip Vnotches and re-entrant corners. For a given set of geometrical and loading conditions, KV illustrates the state of the stress in the vicinity of the notch tip identical to the stress intensity factor (SIF) of cracked configurations in linear elastic fracture mechanics (LEFM). It is dependent on the geometry of the body and boundary conditions. Which ought to be pasted apart from the notch-tip Another aim of the study is to develop a methodology (supported by theoretical foundations) that reflects the occurence of a valid or optimal radial gage location and allows prior estimation of such optimal location for appropriate determination of. Paul et al targets at relating the valid or optimal radial gage locations with the material properties and to confirm this observation a study similar to [23] is accomplished with a different material and the results are suitably shown in the successive section

Strain analysis of sharp V-notches

Development of single strain gage technique

Assessment of the valid or optimal radial strain gage locations

Results and discussions

Conclusions