Keivan Ahmadi

University of Waterloo, Mechanical & Mechatronics Engineering, Graduate Student

Followers

Following

Public Views

Supervisors: Prof.Fathy Ismail
Phone: (519) 888-4567 ext 33639
Address: Keivan Ahmadi, Ph.D Candidate
Department of Mechanical and Mechatronics Engineering
University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1

less

Manish Shrikhande

IIT Roorkee

L.Taner Tunc

Sabanci University

Paul Tobin

Dublin Institute of Technology

Roshan Chitrakar

Nepal College of Information Technology

Onur Avci

West Virginia University

Lev Manovich

Graduate Center of the City University of New York

Isad Saric

University of Sarajevo

Carlo Rainieri

Università del Molise

Suleyman Neseli

Selcuk University (Selçuk Üniversitesi)

Umit Unver

Yalova University

InterestsView All (7)

Uploads

Papers by Keivan Ahmadi

Stability lobes in milling including process damping and utilizing Multi-Frequency and Semi-Discretization Methods

In this work the equivalent viscous model of process damping is integrated into the Multi-Frequen... more In this work the equivalent viscous model of process damping is integrated into the Multi-Frequency Solution and the Semi-Discretization Method to establish the stability lobes in milling. The basic formulations are presented along with the comparisons between the two approaches using examples from the literature. A non-shallow cut is employed in the comparisons. Assessing the performance of the two methods is conducted using time domain simulations. It is shown that the Semi-Discretization Method provides accurate results over the whole tested range of cutting speed, whereas higher harmonics are required to achieve the same accuracy when applying the Multi-Frequency Solution at low speeds. Stability lobes established using the Semi-Discretization Method are verified experimentally. It is shown that these lobes agree closely with cutting tests.► Developing Multi-Frequency Solution and Semi-Discretization Methods including process damping. ► Comparing the two methods at low speed cuts and highly damped systems. ► Higher harmonics are needed at low speed cuts and highly damped systems. ► In highly damped systems with no process damping, stability is higher at low speeds.

Modeling of Machining Chatter in Ball-end Milling Including Process Damping

Analytical stability lobes including nonlinear process damping effect on machining chatter

Experimental investigation of process damping nonlinearity in machining chatter

Machining chatter in flank milling