Topic
Torsion (mechanics)
About: Torsion (mechanics) is a research topic. Over the lifetime, 16511 publications have been published within this topic receiving 189016 citations. The topic is also known as: mechanical torsion.
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01 Jan 1997
TL;DR: In this article, the authors present an approach for reducing the number of cycles of alternating and static stress in a two-dimensional problem with respect to a given r D or r H 76.
Abstract: Index to the Stress Concentration Factors. Preface for the Third Edition. Preface for the Second Edition. 1. Definitions and Design Relations. 1.1 Notation. 1.2 Stress Concentration. 1.3 Stress Concentration as a Two-Dimensional Problem. 1.4 Stress Concentration as a Three-Dimensional Problem. 1.5 Plane and Axisymmetric Problems. 1.6 Local and Nonlocal Stress Concentration. 1.7 Multiple Stress Concentration. 1.8 Theories of Strength and Failure. 1.9 Notch Sensitivity. 1.10 Design Relations For Static Stress. 1.11 Design Relations for Alternating Stress. 1.12 Design Relations for Combined Alternating and Static Stresses. 1.13 Limited Number of Cycles of Alternating Stress. 1.14 Stress Concentration Factors and Stress Intensity Factors. References 2. Notches and Grooves. 2.1 Notation. 2.2 Stress Concentration Factors. 2.3 Notches in Tension. 2.4 Depressions in Tension. 2.5 Grooves in Tension. 2.6 Bending of Thin Beams with Notches. 2.7 Bending of Plates with Notches. 2.8 Bending of Solids with Grooves. 2.9 Direct Shear and Torsion. 2.10 Test Specimen Design for Maximum Kt for a Given r D or r H 76. References. Charts. 3. Shoulder Fillets. 3.1 Notation. 3.2 Stress Concentration Factors. 3.3 Tension (Axial Loading). 3.4 Bending. 3.5 Torsion. 3.6 Methods of Reducing Stress Concentration at a Shoulder. References. Charts. 4. Holes. 4.1 Notation. 4.2 Stress Concentration Factors. 4.3 Circular Holes with In-Plane Stresses. 4.4 Elliptical Holes in Tension. 4.5 Various Configurations with In-Plane Stresses. 4.6 Holes in Thick Elements. 4.7 Orthotropic Thin Members. 4.8 Bending. 4.9 Shear and Torsion. 5. Miscellaneous Design Elements. 5.1 Notation. 5.2 Shaft with Keyseat. 5.3 Splined Shaft in Torsion. 5.4 Gear Teeth. 5.5 Press- or Shrink-Fitted Members. 5.6 Bolt and Nut. 5.7 Bolt Head,Turbine-Blade, orCompressor-Blade Fastening (T-Head). 5.8 Lug Joint. 5.8.1 Lugs with h d 0 . 5. 5.8.2 Lugs with h d 0 . 5. 5.9 Curved Bar. 5.10 Helical Spring. 5.10.1 Round or Square Wire Compression or Tension Spring. 5.10.2 Rectangular Wire Compression or Tension Spring. 5.10.3 Helical Torsion Spring. 5.11 Crankshaft. 5.12 Crane Hook. 5.13 U-Shaped Member. 5.14 Angle and Box Sections. 5.15 Cylindrical Pressure Vessel with Torispherical Ends. 5.16 Tubular Joints. References. Charts. 6. Stress Concentration Analysis and Design. 6.1 Computational Methods. 6.2 Finite Element Analysis. 6.3 Design Sensitivity Analysis. 6.4 Design Modification. Index.
1,020 citations
TL;DR: In this paper, a large deformation viscoplastic polycrystal theory is formulated and a self-consistent approach is developed, where each grain is assumed to be a single ellipsoidal inclusion in a homogeneous equivalent medium.
968 citations
TL;DR: In this paper, a new standard plate theory, which accounts for cosine shear stress distribution and free boundary conditions for shear stresses upon the top and bottom surfaces of the plate, is presented.
932 citations
TL;DR: The elastic constants of pyrolytic graphite which has been highly ordered by annealing under compressive stress have been determined by ultrasonic, sonic resonance, and static test methods.
Abstract: The elastic constants of pyrolytic graphite which has been highly ordered by annealing under compressive stress have been determined by ultrasonic, sonic resonance, and static test methods. Ultrasonic tests yielded the elastic constants c11, c12, c33, c44 = 1/s44, and the stress derivative of c33. The moduli 1/s11 and c44 were determined from the free flexural resonant vibrations of bars, and the shear modulus c44 also was determined from the fundamental torsional resonance of the bars and from the resonance of compound torsion oscillators composed of thin graphite disks with steel end pieces. Static tension, compression, and torsion tests on the pyrolytic graphite yielded a complete set of compliances (s11, s12, s13, s33, and s44). The following self‐consistent set of elastic constants (cij in units of 1011 dyn/cm2; sij in 10−11 cm2/dyn) has been deduced from the results: c11 = 106±2, c12 = 18±2, c33 = 3.65±0.10, c13 = 1.5±0.5, c44 = 0.018 to 0.035, 1/s11 = 102±3, 1/s33 = 3.65±0.10, s12 = −0.0016±0.0006,...
819 citations
TL;DR: In this article, a finite element analysis (FEA) of concrete-filled thin-walled steel tubes subjected to pure torsion is used to investigate the influence of important parameters that determine the ultimate torsional strength.
Abstract: In practice, concrete-filled steel tubes (CFST) are often subjected to torsion. To date, such a problem however has not been addressed satisfactorily by design codes. The present study is thus an attempt to study the torsional behaviours of concrete-filled thin-walled steel tubes. ABAQUS software is used in this paper for the finite element analysis (FEA) of CFST subjected to pure torsion. A comparison of results calculated using this modelling shows good agreement with test results. The FEA modelling was used to investigate the influence of important parameters that determine the ultimate torsional strength of the composite sections. The parametric studies provide information for the development of formulae to calculate the ultimate torsional strength, as well as the torsional moment versus torsional strain curves of the composite sections.
747 citations