ROLE OF UNLOADING IN MACHINING OF BRITTLE MATERIALS

A. Chandra; K. Wang; Y. Huang; G. Subhash

doi:10.1115/IMECE1997-1139

ROLE OF UNLOADING IN MACHINING OF BRITTLE MATERIALS

A. Chandra, K. Wang, Y. Huang, G. Subhash

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Scopus citations

Abstract

A simple stress based defect evolution model is developed to assess the influence of various process paramters on material removal rate (MRR) and induced damage during ceramic grinding processes. Model predictions for normal and lateral damage zones under normal indentations are first compared to fracture models as well as experimental observations on pyrex glass. The proposed model is then extended to simulate oblique indentation events depicting abrasive gritworkpiece interactions during ceramic grinding. It is also easily extendable to real grinding situations involving multiple interacting abrasive grits. Process design options for reducing induced damage in the finished part, and increasing MRR are considered next. In particular, the potential of a new design avenue involving intermittent unloading is investigated. For pyrex glass, it is observed that intermittent unloading can facilitate significant increase in force per abrasive grit without increasing the associated surface and sub-surface fragmentation in the finished part. This design feature may enable significant increase in MRR, while maintaining a very low level of process induced damage in the finished product.

Original language	English (US)
Title of host publication	Manufacturing Science and Engineering
Subtitle of host publication	Volume 2
Publisher	American Society of Mechanical Engineers (ASME)
Pages	83-90
Number of pages	8
ISBN (Electronic)	9780791826799
DOIs	https://doi.org/10.1115/IMECE1997-1139
State	Published - 1997
Externally published	Yes
Event	ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - Manufacturing Science and Engineering - Dallas, United States Duration: Nov 16 1997 → Nov 21 1997

Publication series

Name	ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume	1997-W

Conference

Conference	ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - Manufacturing Science and Engineering
Country/Territory	United States
City	Dallas
Period	11/16/97 → 11/21/97

Funding

The authors gratefully acknowledge the financial support provided under Grant No. DMI - 9610454 of the U.S. National Science Foundation. They are also thankful to Mr. Brian J. Koeppel and Mr. Richard Anton for their kind help with the indentation experiments.

ASJC Scopus subject areas

Mechanical Engineering

Access to Document

10.1115/IMECE1997-1139

Cite this

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title = "ROLE OF UNLOADING IN MACHINING OF BRITTLE MATERIALS",

abstract = "A simple stress based defect evolution model is developed to assess the influence of various process paramters on material removal rate (MRR) and induced damage during ceramic grinding processes. Model predictions for normal and lateral damage zones under normal indentations are first compared to fracture models as well as experimental observations on pyrex glass. The proposed model is then extended to simulate oblique indentation events depicting abrasive gritworkpiece interactions during ceramic grinding. It is also easily extendable to real grinding situations involving multiple interacting abrasive grits. Process design options for reducing induced damage in the finished part, and increasing MRR are considered next. In particular, the potential of a new design avenue involving intermittent unloading is investigated. For pyrex glass, it is observed that intermittent unloading can facilitate significant increase in force per abrasive grit without increasing the associated surface and sub-surface fragmentation in the finished part. This design feature may enable significant increase in MRR, while maintaining a very low level of process induced damage in the finished product.",

author = "A. Chandra and K. Wang and Y. Huang and G. Subhash",

note = "Publisher Copyright: {\textcopyright} 1997 American Society of Mechanical Engineers (ASME). All rights reserved.; ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - Manufacturing Science and Engineering ; Conference date: 16-11-1997 Through 21-11-1997",

year = "1997",

doi = "10.1115/IMECE1997-1139",

language = "English (US)",

series = "ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)",

publisher = "American Society of Mechanical Engineers (ASME)",

pages = "83--90",

booktitle = "Manufacturing Science and Engineering",

}

Chandra, A, Wang, K, Huang, Y & Subhash, G 1997, ROLE OF UNLOADING IN MACHINING OF BRITTLE MATERIALS. in Manufacturing Science and Engineering: Volume 2. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), vol. 1997-W, American Society of Mechanical Engineers (ASME), pp. 83-90, ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - Manufacturing Science and Engineering, Dallas, United States, 11/16/97. https://doi.org/10.1115/IMECE1997-1139

ROLE OF UNLOADING IN MACHINING OF BRITTLE MATERIALS. / Chandra, A.; Wang, K.; Huang, Y. et al.
Manufacturing Science and Engineering: Volume 2. American Society of Mechanical Engineers (ASME), 1997. p. 83-90 (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 1997-W).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - A simple stress based defect evolution model is developed to assess the influence of various process paramters on material removal rate (MRR) and induced damage during ceramic grinding processes. Model predictions for normal and lateral damage zones under normal indentations are first compared to fracture models as well as experimental observations on pyrex glass. The proposed model is then extended to simulate oblique indentation events depicting abrasive gritworkpiece interactions during ceramic grinding. It is also easily extendable to real grinding situations involving multiple interacting abrasive grits. Process design options for reducing induced damage in the finished part, and increasing MRR are considered next. In particular, the potential of a new design avenue involving intermittent unloading is investigated. For pyrex glass, it is observed that intermittent unloading can facilitate significant increase in force per abrasive grit without increasing the associated surface and sub-surface fragmentation in the finished part. This design feature may enable significant increase in MRR, while maintaining a very low level of process induced damage in the finished product.

AB - A simple stress based defect evolution model is developed to assess the influence of various process paramters on material removal rate (MRR) and induced damage during ceramic grinding processes. Model predictions for normal and lateral damage zones under normal indentations are first compared to fracture models as well as experimental observations on pyrex glass. The proposed model is then extended to simulate oblique indentation events depicting abrasive gritworkpiece interactions during ceramic grinding. It is also easily extendable to real grinding situations involving multiple interacting abrasive grits. Process design options for reducing induced damage in the finished part, and increasing MRR are considered next. In particular, the potential of a new design avenue involving intermittent unloading is investigated. For pyrex glass, it is observed that intermittent unloading can facilitate significant increase in force per abrasive grit without increasing the associated surface and sub-surface fragmentation in the finished part. This design feature may enable significant increase in MRR, while maintaining a very low level of process induced damage in the finished product.

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ROLE OF UNLOADING IN MACHINING OF BRITTLE MATERIALS

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