Using Nanoparticle Coating in Dedicated Digital Image Correlation for Mixed-Mode CTOD Calculation and Crack Growth Estimation

Publish Year: 1400
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

MIMCONFE01_011

تاریخ نمایه سازی: 23 فروردین 1401

Abstract:

Crack tip opening displacement (CTOD) is an important parameter in fracture mechanics. Experimentally, the parameter is always calculated using a clip gauge in the first mode. However, the method is inappropriate for the second mode or mixed mode. The current study aims to introduce a new method for CTOD calculation using digital image correlation (DIC). The DIC, which is a powerful technique in the calculation of surface displacement and is applied on various scales, is used to calculate displacements around a crack, thereby calculating the CTOD. The main concept of the study is to use nanoparticles to create a speckle pattern with appropriate speckles to focus on the crack tip and calculate the crack tip displacements. Displacements around cracks are determined by the introduced method, and the capability of the method in the calculation of the CTOD in mixed-mode is proved. Moreover, the crack tip zone and its growth can be determinable.

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Authors

Milad Zolfipour Aghdam

Research assistance, Intelligence Based Experimental Mechanics, University of Tehran, Tehran, Iran

Nasser Soltani

Professor, Intelligence Based Experimental Mechanics, School of Mechanical Engineering, University of Tehran, Tehran, Iran

Abbas Naseri

Masters student, Intelligence Based Experimental Mechanics, University of Tehran, Tehran, Iran

Hamidreza Asemani

Postdoctoral research fellow, Intelligence Based Experimental Mechanics, University of Tehran, Tehran, Iran