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1. |
Record Nr. |
UNINA9910715172503321 |
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Titolo |
Financial assistance: lessons learned from CARES Act loan program for aviation and other eligible businesses : report to congressional committees |
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Pubbl/distr/stampa |
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[Washington, D.C.] : , : United States Government Accountability Office, , 2020 |
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Descrizione fisica |
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1 online resource (ii, 32 pages) : color illustrations |
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Soggetti |
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COVID-19 (Disease) - Economic aspects - United States |
Aeronautics and state - United States |
Aeronautics - United States - Finance |
Business enterprises - United States - Finance |
Economic assistance, Domestic - Law and legislation - United States |
Government lending - Law and legislation - United States |
Federal aid to transportation - United States |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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"December 2020." |
"GAO-21-198." |
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Nota di bibliografia |
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Includes bibliographical references. |
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2. |
Record Nr. |
UNINA9911006982403321 |
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Titolo |
Tribology of abrasive machining processes / / Ioan D. Marinescu ... [et al.] |
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Pubbl/distr/stampa |
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Norwich, NY, : William Andrew Pub., c2004 |
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ISBN |
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9786612769580 |
1-282-76958-8 |
0-08-094702-6 |
1-282-02769-7 |
9786612027697 |
0-8155-1938-9 |
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Descrizione fisica |
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1 online resource (753 p.) |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Grinding and polishing |
Tribology |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Front Cover; Tribology of Abrasive Machining Processes; Copyright Page; Table of Contents; Chapter 1. Introduction; 1.1 ABRASIVE PROCESSES; 1.2 ABRASIVES; 1.3 TRIBOLOGICAL PRINCIPLES; 1.4 A TYPICAL GRINDING PROCESS; 1.5 A TRIBOLOGICAL SYSTEM; REFERENCES; Chapter 2. Tribosystems of Abrasive Machining Processes; 2.1 INTRODUCTION; 2.2 STRUCTURE OF TRIBOMECHANICAL PROCESSING; 2.3 THE THREE TRIBOSYSTEMS IN ABRASIVE MACHINING; 2.4 MODELING TRIBOSYSTEMS OF ABRASIVE PROCESSES; 2.5 CONCLUSIONS; REFERENCES; Chapter 3. Kinematic Models of Abrasive Contacts; 3.1 INTRODUCTION |
3.2 BASIC ANALYSIS OF SURFACE GRINDING3.3 CYLINDRICAL GRINDING CONTACTS; 3.4 IMPLICATIONS OF THE STOCHASTIC NATURE OF GRINDING; 3.5 EFFECT OF DRESSING; 3.6 SUMMARY OF PRINCIPAL KINEMATIC PARAMETERS; REFERENCES; Chapter 4. Contact Mechanics; 4.1 CONTACT AREA; 4.2 CONTACT LENGTH; 4.3 SMOOTH BODY ANALYSIS; 4.4 ROUGH SURFACE ANALYSIS; 4.5 EXPERIMENTAL MEASUREMENTS OF ROUGHNESS FACTOR (Rr); 4.6 ELASTIC STRESSES |
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DUE TO ABRASION; 4.7 SUMMARY OF CONTACT STRESS IMPLICATIONS; REFERENCES; Chapter 5. Forces, Friction, and Energy; 5.1 INTRODUCTION; 5.2 FORCES AND POWER |
5.3 FORCES: SPECIFIC ENERGY AND EFFICIENCY5.4 EXAMPLES OF MATERIALS AND THEIR GRINDING CONDITIONS; 5.5 THE SIZE EFFECT; 5.6 EFFECT OF WEAR FLAT AREA ON SPECIFIC ENERGY; 5.7 WEAR AND DRESSING CONDITIONS; 5.8 EFFECT OF DRESSING TOOL WEAR; 5.9 THE NATURE OF THE GRINDING FORCES; 5.10 FORCE RATIO AND FRICTION COEFFICIENT; 5.11 ADHESIVE AND ABRASIVE WHEEL WEAR; 5.12 SLIP-LINE FIELD SOLUTIONS; 5.13 THREE-DIMENSIONAL PYRAMID MODEL OF GRINDING; 5.14 LIMIT CHARTS; 5.15 PROCESS OPTIMIZATION AND WHEELSPEED; REFERENCES; Chapter 6. Thermal Design of Processes; 6.1 INTRODUCTION |
6.2 EXAMPLES OF SURFACE DAMAGE6.3 THERMAL MODELING-KEY DEVELOPMENTS; 6.4 RATE OF HEAT GENERATION; 6.5 TEMPERATURES IN GRINDING; 6.6 HEAT CONDUCTION IN THE WORKPIECE; 6.7 FLUX DISTRIBUTION; 6.8 PECLET NUMBER; 6.9 TEMPERATURES IN THE CONTACT AREA; 6.10 HEAT FLOWS IN THE CONTACT AREA AND PARTITIONING; 6.11 CASE STUDIES ON PROCESS VARIATIONS AND PROCESS DESIGN; 6.12 SUBSURFACE TEMPERATURES; 6.13 WORK-ABRASIVE PARTITION RATIO - Rws; APPENDIX; REFERENCES; Chapter 7. Molecular Dynamics for Abrasive Process Simulation; 7.1 INTRODUCTION; 7.2 CONCEPT AND BASIC ELEMENTS OF MOLECULAR DYNAMICS |
7.3 REQUIREMENTS FOR MOLECULAR DYNAMICS SIMULATIONS OF ABRASIVE PROCESSES7.4 APPLICATION EXAMPLES FOR MOLECULAR DYNAMICS SIMULATION OF ABRASIVE PROCESSES; 7.5 SUMMARY AND OUTLOOK; REFERENCES; Chapter 8. Fluid Delivery; 8.1 THE ROLE OF PROCESS FLUIDS; 8.2 OVERCOMING THE AIR BARRIER IN HIGH SPEED GRINDING; 8.3 NOZZLES FOR HIGH SPEED GRINDING; 8.4 ENERGY AND MOMENTUM REQUIREMENTS OF THE PROCESS FLUID; 8.5 USEFUL FLOWRATE THROUGH THE GRINDING CONTACT; 8.6 MECHANICS OF COOLING IN CREEP GRINDING; 8.7 SUMMARY OF CONCLUSIONS; REFERENCES |
Chapter 9. Electrolytic In-process Dressing (ELID) Grinding and Polishing |
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Sommario/riassunto |
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Recent and radically improved machining processes, from high wheel speeds to nanotechnology, have turned a spotlight on abrasive machining processes as a fertile area for further advancements. Written for researchers, students, engineers and technicians in manufacturing, this book presents a fundamental rethinking of important tribological elements of abrasive machining processes and their effects on process efficiency and product quality. Newer processes such as chemical mechanical polishing (CMP) and silicon wafer dicing can be better understood as tribological processes. Understanding the t |
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