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- 26 - ЛИТЕРАТУРА 1. Maximov J. T., Kuzmanov T. V., Anchev A. P., Ichkova M. D. A finite element simulation of the spherical mandrelling process of holes with cracks. Journal of Materials Processing Technology 171 (2006) 459-466. 2. Moreira P. M., De Matos P. F. P., Pinho S. T., Pastrama S. D., Camanho P. P., De Castro P. M. S. T. The residual stress intensity factor for cold-worked cracked holes: a technical note. Fatigue Fract Engng Mater Struct 27 (2004) 879-886. 3. Amrouche A., Mesmacque G., Garsia S., Takha A., Cold expansion effect on the initiation and the propagation of the fatigue crack. Intern. Journal of Fatigue 25 (2003) 949-954. 4. Kang J., Johnson S. W. Three Dimensional Finite Element Analysis of the Cold Expansion Process of Holes with and without Cracks. In: The 5-th Joint NASA/FAA/DoD Conference on Aging Aircraft. Orlando, Florida, USA, September 10-13, 2001. 5. E. T. Easterbrook, B. D. Flinn, C. A. Meyer, N. Juhlin, The StressWave TM Fatigue Life Enhancement Process, In: SAE Aerospace Automated Fastening Conference, 2001 Aerospace Congress, Seattle, September 10-14, 2001. 6. Paranikos P., Meguid S. A. Three-dimensional finite element analysis of cold expansion of adjacent holes. Intern. Journal of Mechanical Sciences 40 (10) (1998) 1019-1028. 7. Maximov J. T., Finite element analysis of the spherical mandrelling process of cylindrical holes. Finite Elements nd Analysis and Design 40 (9-10) (2004) 1217-1232. 8. El-Axir M. H., A method of modeling residual stress distribution in turning for different materials. Intern. Journal of Machine Tools and Manufacture, 42 (9) (2002) 1055-1063. 9. Segawa T., Sasahara H., Tsutsumi M., Development of a New Tool to Generate Compressive Residual Stress withim a Machined Surface. International Journal of MTM 44 (2002) 1215-1221. 10. Mittal S., Lid C. R., A method of modeling residual stresses in superfinish hard turning, Wear 218 (1998) 21. 11. Maximov J. T., Anchev A. P., Modelling of residual stress field in spherical mandrelling. International Journal of Machine Tools and Manifacture 43 (12) (2003) 1241-1251. 12. Reid L., Overcoming Rail-End Bolt Hole Cracking by Cold Expansion Pre-Stressing. Report; Fatigue Technology Inc., Seattle, Washington, USA, 1993. 13. Leon A., Benefits of split mandrel coldworking. International Journal of Fatigue 20(1) (1998) 1- 8. 14. Clark D. A., Johnson W. S., Temperature effects on fatigue performance of cold expanded holes in 7050-T7451 aluminum alloy. International Journal of Fatigue 25(2) (2003) 159-165. 15. Karabin M. E., Barlez F., Schultz R. W., Numerical and Experimental Study of the Cold Expansion Process in 7085 Plate using a Modified Split Sleeve. Journal of Materials Processing Technology, 2006 (Accepted) 16. Ganev N., Ичкова М., Дунчева Г., Максимов Й., Двукратно студено разширение на отвори. Част I: Експериментално определяне на остатъчните напрежения. XXXIII Национален семинар по динамика на механични системи, Варна, 10 – 12 септ., 2006. 17. Максимов Й., Ичкова М., Дунчева Г., Ganev N., Двукратно студено разширение на отвори. Част II: КЕ симулации. XXXIII Национален семинар по динамика на механични системи, Варна, 10 – 12 септ., 2006. 18. Chakherlou T. N., Vogwell J., A nowel method of cold expansion which creates near-uniform compressive tangential stress around a fastener holes. Fatique Fract Engng Mater Struct 27 (2004) 343-351. 19. Maximov J. T., Investigation of residual stresses in spherical mandreling of cylindrical holes – Part I: Analitical approach. Journal “Izvestia” of Technical University of Gabrovo, 27 (2003) 15 – 20.
- 27 - 20. Webster G. A., Wimpory R. C., Non-destructive measurement of residual stress by neutron diffraction. Journal of Material Processing Technology 117 (3) (2001) 395-399. 21. Kraus I., Ganev N., X-ray analysis of the inhomogeneous stress state, in: Defects and Microstructure analysis by Diffraction, Eds. R. L. Snyder, J. Fiala and H. J. Bunge, Oxford University Press Inc, Oxford-New York, 1999, pp. 367-401. 22. Hsu Y. C., Forman R. G., Elastic Plastic Analysis of an Infinite Sheet Having a Circular Hole under Pressure. Journal of Applied Mechanics 42 (1975) 347-352. Department of Applied Mechanics Technical university of Gabrovo 5300 Габрово BULGARIA E-mail: maximov@tugab.bg Copyright 2006 by Technical University at Plovdiv, Plovdiv, BULGARIA. ISSN 1310 - 8271
Page 1 and 2: JOURNAL OF THE TECHNICAL UNIVERSITY
Page 3 and 4: - 3 - CONTENTS NIKOLAI ANGUELOV CHI
Page 5 and 6: - 5 - DIMITAR STANKOV, PETYA SERAFI
Page 7 and 8: - 7 - Journal of the Technical Univ
Page 9 and 10: - 9 - Продължение на
Page 11 and 12: - 11 - 3. Заключение От
Page 13 and 14: - 13 - Journal of the Technical Uni
Page 15 and 16: - 15 - 2. Изложение Рек
Page 17 and 18: - 17 - 7. Тодоров, Н., Г.
Page 21 and 22: - 21 - 2. Постановка на
Page 23 and 24: - 23 - 3. Резултати и к
Page 25: - 25 - отвори. При тов
Page 31 and 32: - 31 - (фиг.2,б). Датчик
Page 33 and 34: - 33 - 2. Автоматично п
Page 37 and 38: - 37 - Фиг.3. Детайл с п
Page 39 and 40: - 39 - наклоняване на
Page 43 and 44: - 43 - Фиг. 2. Зависимо
Page 45 and 46: - 45 - Фиг.9. Зависимос
Page 49 and 50: - 49 - Въз основа на т
Page 53 and 54: - 53 - Дължина на трае
Page 55 and 56: - 55 - Материал n R e R m
Page 57 and 58: - 57 - Данните от табл
Page 59 and 60: - 59 - ©Journal of the Technical U
Page 61 and 62: - 61 - Copyright 2006 by Technical
Page 63 and 64: - 63 - От фиг.4 се вижд
Page 65 and 66: - 65 - От фиг.6 се вижд
Page 67 and 68: - 67 - ©Journal of the Technical U
Page 69 and 70: - 69 - разглежда и вли
Page 71 and 72: Температура ° - 71 - 12
Page 73 and 74: - 73 - 4. Изводи 1. Създ
Page 77 and 78:
- 77 - му. Отличават с
Page 79 and 80:
- 79 - изключително к
Page 81 and 82:
- 81 - Journal of the Technical Uni
Page 83 and 84:
100 μm 100μm 100μm 100 μm 100μ
Page 85 and 86:
- 85 - a) b) 40μm 40μm 20μm Фи
Page 87 and 88:
- 87 - a ) c ) e ) 100μm 100μm 10
Page 89 and 90:
- 89 - - след това. В та
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Page 93 and 94:
- 93 - а б в г д е Фиг. 2.
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A ост, % A ост, % - 95 - 35 3
Page 97 and 98:
Page 99 and 100:
- 99 - структура за де
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- 101 - Journal of the Technical Un
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честота - 103 - 60 50 40 30
Page 105 and 106:
- 105 - повърхнина; 6 -
Page 107 and 108:
Page 109 and 110:
- 109 - 3. Експеримента
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Page 113 and 114:
- 113 - При необходимо
Page 115 and 116:
Page 117 and 118:
- 117 - От получените
Page 119 and 120:
- 119 - на двете режещ
Page 121 and 122:
- 121 - Journal of the Technical U
Page 123 and 124:
- 123 - Формалният пов
Page 125 and 126:
ЗММ ООД Смолян за т
Page 127 and 128:
Page 129 and 130:
- 129 - Създадена като
Page 131 and 132:
- 131 - НАЧАЛО Въвежда
Page 133 and 134:
- 133 - НАЧАЛО Въвежда
Page 135 and 136:
- 135 - Работата на ад
Page 137 and 138:
Page 139 and 140:
- 139 - За да може да с
Page 141 and 142:
- 141 - Първоначално с
Page 143 and 144:
Page 145 and 146:
- 145 - Copyright 2006 by Technica
Page 147 and 148:
- 147 - При обработван
Page 149 and 150:
Page 151 and 152:
- 151 - на блока в рамк
Page 153 and 154:
- 153 - Изчислени са с
Page 155 and 156:
Page 157 and 158:
- 157 - Фиг. 3. Съставян
Page 159 and 160:
- 159 - Journal of the Technical U
Page 161 and 162:
- 161 - plot(Omega./0.01745,Tsum,'*
Page 163 and 164:
- 163 - ЛИТЕРАТУРА 1. А
Page 165 and 166:
Page 167 and 168:
∆е.п.неизкл. wк.и wи.
Page 169 and 170:
- 169 - В таблиците по
Page 171 and 172:
- 171 - Таблица.1. Нива
Page 173 and 174:
Page 175 and 176:
- 175 - или да се спазв
Page 177 and 178:
- 177 - ЦПУ, а крайния
Page 179 and 180:
Page 181 and 182:
- 181 - Фиг.2. Възможни
Page 183 and 184:
- 183 - Фиг.3. Размерна
Page 185 and 186:
Page 187 and 188:
- 187 - требованиях па
Page 189 and 190:
- 189 - ] ... [ ] [ ] , 0
Page 191 and 192:
Page 193 and 194:
- 193 - За зоната на но
Page 195 and 196:
- 195 - v C a f v к к к , (15)
Page 197 and 198:
- 197 - 3. Експеремента
Page 199 and 200:
Page 201 and 202:
- 201 - Израз (2) има мн
Page 203 and 204:
- 203 - преместваният
Page 205 and 206:
- 205 - 2. Георгиев В., С
Page 207 and 208:
Page 209 and 210:
- 209 - определяне вли
Page 211 and 212:
- 211 - Разширената ма
Page 213 and 214:
- 213 - BULGARIA e-mail: tyiamb@tu-
Page 215 and 216:
- 215 - структура на п
Page 217 and 218:
Page 219 and 220:
- 219 - Фиг3. Микростру
Page 221 and 222:
Page 223 and 224:
- 223 - Пластмасовата
Page 225 and 226:
- 225 - % 100 90 80 70 60 50 40 30
Page 227 and 228:
Page 229 and 230:
- 229 - Фиг. 1 Фиг. 2 Фиг.
Page 231 and 232:
Page 233 and 234:
- 233 - Формира се фун
Page 235 and 236:
- 235 - комбинации меж
Page 237 and 238:
- 237 - Табл.5. Оптимиз
Page 239 and 240:
Page 241 and 242:
- 241 - На фиг.5 е показ
Page 243 and 244:
Page 245 and 246:
Тестване на основн
Page 247 and 248:
Тестване на систем
Page 249 and 250:
Page 251 and 252:
- 251 - Оскъдни са дан
Page 253:
- 253 - 7. Петкова Ек., Е
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