BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI - Universitatea ...

More documents

Recommendations

Info

220 Dănuț Zahariea and Mihaela Tudorache 4. Conclusions 1. Both constructive solutions comply with the requirements of the resistance. Thus, the maximum equivalent stress is 7 2. 33⋅ 10 Pa for the coupling with pins in the same plane and 2. 97 ⋅ 10 Pa for the other case. Both the maximum stresses are in the shearing areas of the driving pin. For the two shafts, the maximum stress areas are placed near the holes. For the sleeve coupling the maximum stress areas are placed also near the holes, on the cylindrical inside surface of the sleeve. 2. The two pins respond differently at the applied loads. Thus, the driving pin takes a larger effort having a bigger strain. Moreover, the strain profile along the pins longitudinal axis is different. 3. The mesh configuration parameters have a great influence on both the hardware resource requirements and the numerical analysis errors. Received: March 20, 2010 7 “Gh. Asachi” Technical University Department of Fluid Mechanics, Hydraulic Machines and Drives Iaşi, România email: dzahariea@yahoo.com email: mihaela_tudorache10@yahoo.com R E F E R E N C E S 1. D e m i a n T., Elemente constructive de mecanică fină. Ed. Didactică şi Pedagogică, Bucureşti, 1980. 2. D r ă g h i c i I., et al., Calculul şi construcţia cuplajelor. Ed. Tehnică, Bucureşti, 1978. ANALIZA STRUCTURALĂ A CUPLAJELOR FIXE DE TIP MANŞON CU ŞTIFTURI CILINDRICE (Rezumat) În lucrare se prezintă etapele analizei structurale şi rezultatele unui studiu cu privire la cuplajele fixe de tip manşon cu ştifturi cilindrice plasate în acelaşi plan, respectiv în plane decalate la 90°. Analiza efectuată în programul CATIA permite evidenţierea rapidă a unor aspecte particulare care ar putea fi puse în evidenţă cu dificultate printr-un calcul clasic de rezistenţa materialelor: asimetria distribuţiei momentului, asimetria stării de deformare, influenţa concentratorilor de tensiune, poziţia secţiunilor critice pentru fiecare element al cuplajului. Modificarea factorului de scală şi vizualizarea animată a tensiunilor echivalente şi a deformaţiilor permit interpretări interesante cu privire la evoluţia în timp a stării de solicitare şi a tendinţei reale de deformaţie a cuplajului fix de tip manşon cu ştifturi cilindrice.
BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică „Gheorghe Asachi” din Iaşi Tomul LVI (LX), Fasc. 2, 2010 Secţia CONSTRUCŢII DE MAŞINI STRUCTURAL ANALYSIS OF A BIMETALLIC STRIP THERMOSTAT BY DĂNUŢ ZAHARIEA and MARIUS STACHIE Abstract. In this paper the structural analysis of a bimetallic strip will be analyzed using CATIA Generative Structural Analysis workbench. The structural analysis procedure will be presented. Six different bimetallic strips have been considered with titanium as active layer and zinc, aluminum, bronze, brass, copper and steel as passive layer. The numerical analysis has been performed under the same global conditions (geometrical characteristics, restraints and thermal load) using two variable parameters: the width and the length of the beams. For all these study cases only the thermal load generated by an imposed temperature field has been considered. Charts are presented for comparative analysis of the influence of the material, the width and the length of the beams on the von Misses stress and the maximum deflection. Key words: thermostat, bimetallic strip, structural analysis, CATIA. 1. Introduction The bimetallic springs used as sensitive elements of the thermostats are made by two beams of rectangular cross section bounded together. The two beams are made of materials with different coefficients of thermal expansion, α a > α p . Under a uniform temperature field Δ T the bimetallic strip will curve toward the passive material (the material with lower coefficient of thermal expansion). The sensitivity of the bimetallic strip will be better as long the difference α a − α p will be higher. In this paper, the materials used are: titanium as passive layer and zinc, aluminum, bronze, brass, copper and steel as passive layer. Characteristics of materials relevant for the analysis are shown in Table 1. The main geometric characteristics of the bimetallic strip are shown in Fig. 1.
Page 1:
BULETINUL INSTITUTULUI POLITEHNIC D
Page 5:
Papers presented at THE INTERNATION
Page 8 and 9:
SILVIU BERBINSCHI, VIRGIL TEODOR, N
Page 10 and 11:
Page 12 and 13:
CONSTANTIN CHIRIȚĂ, ADRIAN HANGAN
Page 15 and 16:
Page 17 and 18:
Bul. Inst. Polit. Iaşi, t. LVI (LX
Page 19 and 20:
(6) ⎧ ⎪ ⎨ ⎪ ⎩⎪ FR 1 FR
Page 21:
Page 24 and 25:
10 Taxiarchis Belis and Aristomenis
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
22 Nikolaos Tapoglou and Aristomeni
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
32 Eugen Străjescu et al. The mode
Page 48 and 49:
34 Eugen Străjescu et al. On the o
Page 50 and 51:
36 Eugen Străjescu et al. 3.5 3 2.
Page 52 and 53:
38 Eugen Străjescu et al. 2.5 2 1.
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
(5) Bul. Inst. P olit. Iaşi, t. LV
Page 71 and 72:
Page 73 and 74:
p (4) g( ) (5) p g( ) Bul. Inst. Po
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
(5) Bul. Inst . Polit. Iaşi, t. LV
Page 83 and 84:
Page 85 and 86:
Page 87:
Page 90 and 91:
76 Ana-Maria Matei and Marius-Nicol
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
84 Marius Ionuţ Rîpanu et al. The
Page 100 and 101:
86 Marius Ionuţ Rîpanu et al. Fig
Page 102 and 103:
88 Marius Ionuţ Rîpanu et al. The
Page 104 and 105:
90 Marius Ionuţ Rîpanu et al. R E
Page 106 and 107:
92 Iustina Elena Rotman et al be co
Page 108 and 109:
94 Iustina Elena Rotman et al This
Page 110 and 111:
96 Iustina Elena Rotman et al 5. *
Page 112 and 113:
98 Cătălin Ungureanu et al. Devia
Page 114 and 115:
100 Cătălin Ungureanu et al. VI g
Page 116 and 117:
102 Cătălin Ungureanu et al. d [m
Page 118 and 119:
104 Cătălin Ungureanu et al. SIST
Page 120 and 121:
106 Birgit Kjærside Storm parts wi
Page 122 and 123:
108 Birgit Kjærside Storm They are
Page 124 and 125:
110 Birgit Kjærside Storm A fresh
Page 126 and 127:
112 Birgit Kjærside Storm rate of
Page 128 and 129:
114 Birgit Kjærside Storm The HSP
Page 130 and 131:
116 Birgit Kjærside Storm 4. P i z
Page 132 and 133:
118 Ioana Petre et al. The utilizat
Page 134 and 135:
120 Ioana Petre et al. by a pneumat
Page 136 and 137:
122 Ioana Petre et al. Another appl
Page 138 and 139:
124 Ioana Petre et al. APLICAŢII I
Page 140 and 141:
126 Mihăiță Horodincă absorbed
Page 142 and 143:
128 Mihăiță Horodincă 3. Some E
Page 144 and 145:
130 Mihăiță Horodincă For certa
Page 146 and 147:
132 Mihăiță Horodincă behaviour
Page 149 and 150:
Page 151 and 152:
As the planetary processional trans
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
(4) Bul. Inst. Polit. Iaşi, t. LVI
Page 179 and 180:
Page 181 and 182:
Page 183 and 184: Bul. Inst. Polit. Iaşi, t. LVI (LX
Page 191 and 192: BULETINUL INSTITUTULUI POLITEHNIC D
Page 205 and 206: (1) Bul. Inst. Polit. Iaşi, t. LVI
Page 215 and 216: (4) Bul. Inst. Polit. Iaşi, t. LVI
Page 221 and 222: then, under the principle of optima
Page 225 and 226: c) Calculate values (14) ⎧V ⎪
Page 227: Bul. Inst. Polit. Iaşi, t. LVI (LX
Page 230 and 231: 216 Dănuț Zahariea and Mihaela Tu
Page 232 and 233: 218 Dănuț Zahariea and Mihaela Tu
Page 236 and 237: 222 Dănuț Zahariea and Marius Sta
Page 242 and 243: 228 Irène Alexandrescu et al. Glob
Page 244 and 245: 230 Irène Alexandrescu et al. 3. S
Page 246 and 247: 232 Irène Alexandrescu et al. The
Page 248 and 249: 234 Irène Alexandrescu et al. depa
Page 261 and 262: Conventional approach Client specif
Page 277 and 278: Rate of recycling, [%] Bul. Inst. P
Page 285 and 286:
Page 287 and 288:
Fig. 15 - Air velocity distribution
Page 289:
Page 292:
Stachie Marius 221 Storm Kjærside
show all

BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI - Universitatea ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?