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sisvu:academicYear 2003 (xsd:int)
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sisvu:description Purpose and methods. Stress, transformation of plane stress. Principal stresses. Mohr?s circle of stress. Normal, shearing and volumetric strain. Transformation of plane strain. Principal strains. Hookes law. Elastic constants and relations among E, G, K and . Calculated, working and allowable stress. Factor of safety.Generally loaded member. Internal forces. Axial force, shear and bending moment. Axially loaded member. Stress and elongation. Initial, residual and thermal stresses. Statically indetermined members. Stress concentration. St. Venant?s principle. Torsion of circular and tubular members. Torsion formula and angle of twist. Design of circular members in torsion. The governing differential equations for angel of twist. Statically indeterminated problems. Design of torsiom members. Bending of beams. Bending and shearing stresses in beams. Design of prismatic beams. Differential equations of elastic beams of the second and fourth order. Deflection and rotation of the elastic curve. Statically indeterminated bems. Skew bending. Bending of curved beams.Elastic strain energy. Dilatation and distorsion strain energy. Yield an fracture criteria. Buckling of columns. Euler buckling load Tetmayers formula. (en)
sisvu:description Zadaci i metode nauke o čvrstoći. Naprezanje, transformacija ravninskog naprezanja. Glavna naprezanja. Mohrova kružnica naprezanja za ravninsko i prostorno naprezanje. Duljinska, kutna i obujamna deformacija. Transformacija deformacije, glavne deformacije. Hookeov zakon, konstante elastičnosti i veza među njima. Stvarno, proračunsko i dopušteno naprezanje, faktor sigurnosti. Opći slučaj opterećenja štapa. Unutarnje sile. Opći pristup analizi naprezanja i deformacija u nauci u čvrstoći. Osno opterećenje štapa. Produljenje i naprezanja. Toplinska, početna i montažna naprezanja. Statički neodređeni problemi. Koncentracija naprezanja i St. Venantov princip. Uvijanje okruglog štapa. Izrazi za naprezanje i kutove zakreta. Diferencijalna jednadžba i rubni uvjet. Dimenzioniranje. Statički neodređeni zadaci. Savijanje ravnog štapa. Izrazi za normalno i posmično naprezanje, povoljni oblici presjeka štapa. Diferencijalna jednadžba savijanja drugog i četvrtog reda. Određivanje progiba i nagiba metodom analogne grede. Statički neodređeni zadaci. Koso savijanje. Savijanje debelog zakrivljenog štapa. Smicanje. Energija deformiranja. Energija promjene obujma i energija promjene oblika. Teorije čvrstoće. Izvijanje štapa u elasitčnom i plasitčnom podurčju. Eulerova kritična sila, Tetmajerova formula (hr)
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