I.S. Jawahir’s talk:
The talk presented a synthesis of the existing slip-line models in metal cutting theory with emphasis on the work done by their group based on the universal slip-line model. Though most of these metal-cutting models cannot be extended to composite machining due to the inherent differences between metals and composites, it was interesting to see their approach. The most surprising part was the definition of friction coefficient on the tool-chip interface. Instead of the friction coefficient, they have defined a tau/k equivalent term. Due to the excessive temperatures at this interface, this quantity is estimated using regression analysis. This difficulty in establishing a valid friction coefficient is hightened due to the inability to correctly evaluate the temperatures at this interface. Dr. Fang, a previous student of Dr. Jawahir elaborated on this in a subsequent session. He suggested taking the “optimal” coefficient that would yield the best solutions which surely doesnt seem accurate to say the least! Consequently, further research in this field was conferred quintessential. 🙂
Dr. Jawahir’s talk reminded me in many ways of Dr. Ramulu’s lecture, bubbling with energy and enthusiasm, even the jokes! 🙂 For once I was grateful for the absent speakers, he spoke for a good 40 minutes.
As the Chair Dr. Jay Gunasekera mentioned at the onset, it was a truly international conference. There were researchers from over 40 countries in the fields of Materials Processing and Technology. Though I did not actually meet the authors of the papers that I had “dissected”, it was quite an impressive crowd. Most of them were from academia though the Plenary talks were given by Mr. Robert Noel and Mr. George Mochnal. There were quite a few people missing which led to greater time slots for each speaker. I guess the main reason was difficulty in getting visas etc.
I did spend some time during each talk trying to place their accents. It was quite remarkable, for example, I found out that the Polish usually speak English by writing it down on a piece of paper and then reading that aloud! 🙂 Most Europeans are so expressive, hand gestures, eyebrows flying about; it was comic at times. My brethren Asians were as always, overly apologetic for taking up breathing space so to speak. Non-Indian Asians have such great dressing sense, and what amazing hairdos! I dont know about being the frontiers of technology (they did have the best laser pointers!) but they have undoubtedly surpassed the rest of the world in fashion. I mean if these countries produce graduate students with such good taste what about the rest of the demographic! 🙂 I am exaggerating of course, but there is some grain of truth in all this.