beams torsion of shafts and buckling of struts

... analysis of the preceding section to the uniform torsion of thin-walled opensections of any cross-sectional form Figure 16.17 Torsion of an angle section Torsion of circular shafts and thin-walled ... cross-section of the shaft The solid circular shaft of Figure 16.2 has a length L and radius a in the cross-section Figure 16.2 Torsion of a solid circular shaft 369 Torsion of solid circular shafts ... strain is 382 Torsion of circular shafts and thin-walled tubes 1-8 L Y = - from equation (16.4) Thus, from a torsion test, in whch values of T and are measured, the shearing stress T and strain...

Ngày tải lên: 08/04/2014, 11:29

... A Figure 20.14 Sand-hill for triangular section Torsion of non-circular sections 514 Now T~~ = G6 slope of sand-hill x or and therefore, the volume of the sand-hill is 9fiG8 and T,, = 2G8 x ... behaviour of a thin weightless membrane under lateral pressure was more readily understood than that of the torsion of a noncircular section, the application of a membrane analogy to the torsion of ... (2 (20.4) -y) Torsion of non-circuhr sections 494 = shear strain in the y-z plane = ,y - + a ~= aw ay (20.5) e(?+,) az The equations of equilibrium of an infinitesimal element of dimensions dx...

Ngày tải lên: 08/04/2014, 11:29

... between and 50 mm and amplitudes between 100 nm and 1.5 mm, depending on the thickness of the silicon and the level of prestrain in the PDMS (Khang, et al., 2006) The periods and amplitudes of the ... affected by wrinkles and the direction of the wrinkles Numerical simulation is used to compute the geometry of the wrinkles in thin film and PDMS structures of realistic shape and size, and compared ... Introduction of buckling of stiff thin film-compliant substrate system The measurement of the amplitude and wavelength (by SEM and ATF) is performed for comparison between analytical and numerical...

Ngày tải lên: 14/09/2015, 08:42

... Chapter Design of Beams Using Ti Alloys Chapter Fabrication of Ti Alloy Test Beams Chapter Static Bend Tests of Ti Alloy Beams Chapter Fatigue Tests of Ti Alloy Beams Chapter Analysis of Test Results ... (HNO3), 10 ml of hydrofluoric acid (HF) and 85 ml of water (H2O) The polished and etched surface of the samples of CP (Grade 2) and Ti-6Al-4V alloy was observed in an optical microscope and photographed ... experimentally and theoretically evaluate Ti alloy beams fabricated and tested under both static and fatigue loading  To develop analysis and design approaches for static and fatigue performance of built-up...

Ngày tải lên: 04/07/2016, 17:26

... PLATES by Liew and Chen [72], the solution of Leissa and Ayoub [73], and the solution of Timoshenko and James [74] Normalized buckling load factors are presented in Table II The results of the present ... occupied by the mid-plane of the plate and u0 , v0 , and w0 and ˇ D ˇx , ˇy /T denote the displacement components in the x, y, and ´ directions and the rotations in the y–´ and x–´ planes (Figure ... Journal of Solids and Structures 1983; 19:207–228 30 Zhen W, Wanji C Free vibration of laminated composite and sandwich plates using global–local higher-order theory Journal of Sound and Vibration...

Ngày tải lên: 16/12/2017, 11:18

... to the lack of calcification on histology Conclusion Torsion of intraperitoneal fat is a rare but well recognised cause of acute abdominal pain, often mimicking more common causes of an acute ... 12-hour history of right-sided abdominal pain and peritonism, and exploratory laparotomy revealed a 3cm × 2cm necrotic piece of fat on the parietal peritoneum 10cm to the right of the umbilicus ... causes of abdominal pain are correctly diagnosed and treated Consent Written informed consent was obtained from the patient for publication of this case report and accompanying images A copy of the...

Ngày tải lên: 11/08/2014, 17:21

... sonography in the diagnosis of ovarian torsion Fertil Steril 2000, 73:1047-1050 Born C, Wirth S, Stäbler A, Reiser M: Diagnosis of adnexal torsion in the third trimester of pregnancy: a case report ... Laparoscopic management of a nonobstetric emergency in the third trimester of pregnancy Surg Endosc 2007, 8:1344-1348 Adnexal torsion is rare in the second trimester of pregnancy and exceptional in ... suspicion of adnexal torsion MRI is a potential alternative, as it can demonstrate signs of hemorrhagic infarction [5] Laparoscopic management of a non-obstetric emergency in the third trimester of...

Ngày tải lên: 11/08/2014, 19:21

... feasible and safe, in experienced hands Initial decompression of the distended gallbladder allows for easier handling in both open and laparoscopic approaches Conclusion In summary, torsion of the ... suggesting haemorrhage and necrosis [6] Prompt laparoscopy or laparotomy followed by detorsion and cholecystectomy is mandatory to avert the potentially fatal sequelae of gangrene and perforation Laparoscopic ... seventh and eighth decades of life A pre-operative diagnosis is unusual and prompt surgery is necessary to avoid the high morbidity and mortality associated with gangrene and perforation [2] Torsion...

Ngày tải lên: 11/08/2014, 21:22

... remainder of the book focuses on how to prepare and analyze samples using FIB and related tools, and presents specific applications and techniques of the uses of FIB milling, deposition, and dual ... loss rate of the incident ion are its energy the atomic masses and and atomic numbers and of the ion and the target atoms, respectively The nature of the cascade is dependent on the ratio of the ... bombardment of a solid Milling takes place as a result of physical sputtering of the target An understanding of sputtering requires consideration of the interaction between an ion beam and the target...

Ngày tải lên: 11/05/2018, 15:45

... of soil material (body/toe) Clay mud, clay sand, clay, sand dust /dust sand Clay mud, clay sand, average sand, dust clay /dust sand Clay mud, average sand, dust clay / Cohesive average sand and ... average sand, dust clay / discrete average sand Gravel fine sand, gravel clay, sandy clay/dust sand Gravel fine sand, gravel clay/average dust sand Cohesive and Mud, clay, clay sand/Clay sand discrete ... complexity of geology; experience level of the participants in the management, design and construction limits and especially the system of processes, standards are still in the process of integration and...

Ngày tải lên: 02/07/2014, 20:32

... inflammation, and axial torsion [13] Fibrous vitelline bands may exist and connect the MD to the abdominal wall, increasing the chance of its torting [5] An increase in diverticular length and the size of ... supply and leading to gangrene, the presence of a fibrous mesodiverticular band, and the rare presence of neoplasm The importance of suspecting MD pathology in the differential diagnosis and its ... Cite this article as: Seth and Seth: Axial torsion as a rare and unusual complication of a Meckel’s diverticulum: a case report and review of the literature Journal of Medical Case Reports 2011...

Ngày tải lên: 11/08/2014, 00:23

Ngày tải lên: 14/11/2014, 11:16

... the derivation of stability criteria and the effect of time-varying temperature cycles 2 The large time-range for buckling evolution follows from the large range of time-dependence of polymers, ... response, we consider first the case of the standard linear solid with the intention of characterizing the typical aspects of the problem and to allow for an evaluation of the numerical scheme applied ... series of expo- nentials (Prony- Dirichlet series) of 30 terms 15 PMMA The reason is that the coefficient of thermal expansion of PMMA is about two orders of magnitudes larger than that of typical...

Ngày tải lên: 29/11/2014, 06:49

... Two Buckling Analysis Methods and their Application Series and Ritz-type buckling analyses Y Narita Finite element buckling and postbuckling analyses A K Noor Finite strip buckling and postbuckling ... USA Professor AK Noor Ferman W Perry Professor of Aerospace Structures and Director of the Center for Computational Structures Technology School of Engineering and Applied Science University of ... Three Effects of Complicating Characteristics on Buckling Response Shear deformation and sandwich configuration C W Bert Temperature and absorbed moisture T R Tauchert Buckling of bimodular composite...

Ngày tải lên: 15/02/2015, 20:40

... solution of critical buckling temperature of orthotropic unidirectional and woven composite plate with different aspect ratio of plate, volume fraction of reinforcement fiber and types of reinforcement ... investigation of thermal buckling investigation included evaluated the mechanical and thermal properties of unidirectional and woven reinforcement fiber, then, evaluated of the thermal buckling of composite ... =number of warp yarns per meter, n2 =number of fill yarns per meter And, E1w , E2w , G12 w , and ν12 w are mechanical properties of woven fabrics in and 2-directions; and E1 , E2 , G12 , and ν12...

Ngày tải lên: 09/09/2015, 10:17

... buckling of CNT 96 4.2.1 Definition of torsional buckling 96 4.2.2 Torsional buckling results for non-chiral SWCNTs 98 4.2.3 Effect of θ and D on torsional buckling of SWCNT ... Compressive buckling of CNT: comparison of thick shell and MD results 115 5.3 Torsional buckling of CNT 125 ix 5.3.1 Thick shell results for torsional buckling of armchair ... anticlockwise torsion Occurrence of torsional buckling is indicated by the degradation of the slope of (torque) MZ versus (end rotation)  curve The critical buckling torque (Mcr) and critical buckling...

Ngày tải lên: 09/09/2015, 11:19

... hulls, and offshore structures (Mirza and Uy, 2010; Sohel and Liew, 2008; Wright et al 1991b; Roberts et al., 1996) SCS sandwich shell is the curved form of SCS sandwich structure It is made of infill ... connectors and ULCC Two series of SCS sandwich beams are designed with J-hook connectors and headed shear studs respectively Different parameters influencing the ultimate strength of the SCS sandwich beams ... on predicting strength of the J-hook connectors provide the basis for designing of the SCS sandwich beams, plates and shells with such type of connector The analysis model and numerical model developed...

Ngày tải lên: 09/09/2015, 17:57

... Effect of volume fraction 116 5.5.4 Buckling of embedded CNTs of various diameters 121 5.5.5 Buckling of embedded CNTs of various lengths 125 5.6 Concluding remarks CHAPTER 6: BUCKLING OF DEFECTIVE ... of different configurations of vacancy defects, such as the number of missing atoms and the shape of defects, on the buckling properties of SWNTs and DWNTs are studied The cumulative effect of ... on the buckling of defective freestanding CNTs Here, effects of different defect parameters, such as number of missing atoms, number of dangling bonds, asymmetry of defects and number of vacancy...

Ngày tải lên: 09/09/2015, 18:54

... CRACKING MODE AND SHEAR STRENGTH OF LIGHTWEIGHT CONCRETE BEAMS KUM YUNG JUAN (B.Eng (Hons.) Malaya) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CIVIL AND ENVIRONMENTAL ... SB and SX1 series beams 102 Figure 3-22 Crack pattern after physical failure of SB C50 and SB C70 series beams 103 Figure 3-23 Cracking patterns after physical failure of SXB and ... British Standard Institute’s “Structural Use of Concrete: Code of Practice for Design and Construction, BS 8110 : 1997”, and Eurocode 2: “Design of Concrete Structures” provides for the design of shear...

Ngày tải lên: 10/09/2015, 15:48

... methods of strengthening, and not add much load to the structure; Easy installation and less interruption on the normal usage of the structure; and Possibility of re-stressing and replacement of tendons ... simple-span and continuous beams, as well as in strengthening beams in RC frames The study focused on: (1) proposal of a direct design and analysis method for strengthening simple-span and continuous beams ... The flexural response of the frames was not affected by the tendon profile, in terms of beams deflections at service load level ix List of Notations LIST OF NOTATIONS a depth of equivalent rectangular...

Ngày tải lên: 14/09/2015, 08:50