HANDBOOK OFADVANCED CERAMICS MACHININGEDITED doc

[...]... Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 8 6.10.2006 2:05am Handbook of Advanced Ceramics Machining 8 Tension Compression FIGURE 1.6 Stress distribution in the workspace during cutting (undeformed chip thickness is 1 mm) Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 9 6.10.2006 2:05am Ductile Grinding of Ceramics: Machine... Japan Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page xiii 18.10.2006 6:35pm Contents 1 Ductile Grinding of Ceramics: Machine Tool and Process 1 H Eda 2 Ductile-Mode Ultra-Smoothness Grinding of Fine Ceramics with Coarse-Grain-Size Diamond Wheels 29 H Yasui 3 Mechanisms for Grinding of Ceramics 55 S Malkin and T.W Hwang 4 Grinding of Ceramics with Attention... Holl, and N.-A Daus Index 355 Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 1 6.10.2006 2:05am 1 Ductile Grinding of Ceramics: Machine Tool and Process H Eda CONTENTS 1.1 Ceramics and Metals 1 1.2 Brittle Materials and Grinding 4 1.3 In-Site Observation of Ductile Behavior in Ceramics 9 1.3.1 Scratch at the Brittle-Mode ... I.D Marinescu 10 Mono- Versus Polycrystalline Diamond Lapping of Ceramics 247 M Pruteanu, I Benea, and I.D Marinescu Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page xiv 18.10.2006 6:35pm 11 Double Fracture Model in Lapping of Ceramics 257 I.D Marinescu 12 Double Side Grinding of Advanced Ceramics with Diamond Wheels 263 C.E Spanu, I.D Marinescu,... Ductile-Mode Grinding of Ceramics 15 1.5 Machine Tools for Ductile Grinding of Ceramics 18 1.5.1 Design Criteria of Ductile Microgrinding Machine Tool 18 1.5.2 Key Technologies of a Ductile Microgrinding Machine Tool 21 References 28 1.1 Ceramics and Metals Engineering materials are generally referred to as metallic and nonmetallic (ceramics and high polymers)... Fracture toughness, KIC Ductile > Brittle [jj] Weibull coefficient, m Ductile > Brittle [jjj] Crack growth rate, n Ductile < Brittle 1 Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 2 6.10.2006 2:05am Handbook of Advanced Ceramics Machining 2 s s Yield stress ∼ sy Crack formation stress Microplastic = emp stress sf sy H′ Elastic deformation Chip formation Elastic strain... of the material (approximately about 4000–6000 m=sec) dC ¼ dt sffiffiffi E r where E is Young’s modulus and r the material density (1:4) Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 4 6.10.2006 2:05am Handbook of Advanced Ceramics Machining 8 4 Final crack KI > KIC Cc dCc = 4000−6000 m/s dt Crack rate dC dt Kt = KIC Grinding surface Main crack 2 (Cc = E /r) dCI < =... (average) are about three times different The valley depth of ceramics is one digit larger than its centerline average roughness The tip angle 2a of the valley for each material is about 2a % 134 j 2a % 150 170 Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 5 6.10.2006 2:05am Ductile Grinding of Ceramics: Machine Tool and Process 5 Vs Plastic flow Chip Grain... stress–strain diagram, but is not precisely correspondent to the thermal and dynamical environments in the actual 3D-grinding zone Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 6 6.10.2006 2:05am Handbook of Advanced Ceramics Machining 6 In machining of brittle materials, it is generally known that ductile behavior is achieved when the specific material removal...Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page x 18.10.2006 6:35pm Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page xi 18.10.2006 6:35pm Contributors Th Ardelt Institute for Machine Tools and Factory Management, . alt="" HANDBOOK OF ADVANCED CERAMICS MACHINING Ioan D. Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page i 18.10.2006 6:35pm Ioan D. Marinescu /Handbook of Advanced Ceramics. Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 4 6.10.2006 2:05am 4 Handbook of Advanced Ceramics Machining It means that extremely sharp cracks extend deeply into ceramics. . been possible. Ioan D. Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page vii 18.10.2006 6:35pm Ioan D. Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final