1 / 47

BIBLIOGRAFIA

Bernard J. Hamrock , Elementos de máquinas. Ed. Mc Graw Hill. Robert L. Norton , Diseño de máquinas. Ed. Prentice Hall. Shigley , Diseño en Ingeniería Mecánica, Ed. Mc Graw-Hill. BIBLIOGRAFIA. Load, Stress and Strain. When I am working on a problem, I never think

colm
Download Presentation

BIBLIOGRAFIA

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bernard J. Hamrock, Elementos de máquinas. Ed. Mc Graw Hill. Robert L. Norton, Diseño de máquinas. Ed. Prentice Hall. Shigley, Diseño en Ingeniería Mecánica, Ed. Mc Graw-Hill BIBLIOGRAFIA

  2. Load, Stress and Strain When I am working on a problem, I never think about beauty. I only think of how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong. Richard Buckminster Fuller Image: A dragline lifts a large load in a mining operation.

  3. A Simple Crane Figure 2.1 A simple crane and forces acting on it. (a) Assembly drawing; (b) free-body diagram of forces acting on the beam. text reference: Figure 2.1, page 30

  4. Supports and Reactions Table 2.1: Four types of support with their corresponding reactions. text reference: Table 2.1, page 35

  5. Ladder Free Body Diagram Figure 2.5: Ladder having contact with the house and the ground while having a painter on the ladder. Used in Example 2.4. The ladder length is l. text reference: Figure 2.5, page 36

  6. Load Classification Figure 2.2 Load classified as to location and method of application. (a) Normal, tensile (b) normal, compressive; (c) shear; (d) bending; (e) torsion; (f) combined text reference: Figure 2.2, page 31

  7. Sign Convention Figure 2.3 Sign convention used in bending. (a) y coordinate upward; (b) y coordinate downward. text reference: Figure 2.3, page 32

  8. Lever Assembly Figure 2.4 Lever assembly and results. (a) Lever assembly; (b) results showning (1) normal, tensile, (2) shear, (3) bending, (4) torsion on section B of lever assembly. text reference: Figure 2.4, page 33

  9. Beam Supports Figure 2.8 Three types of beam support. (a) Simply supported; (b) cantilevered; (c) overhanging. text reference: Figure 2.8, page 39

  10. Simply Supported Bar Figure 2.9 Simply supported bar with (a) midlength load and reactions; (b) free-body diagram for 0<x<l/2; (c) free body diagram for l/2<x<l; (d) shear and bending moment diagrams. text reference: Figure 2.9, page 40

  11. Singularity Functions (Part 1) Table 2.2 Six singularity and load intensity functions with corresponding graphs and expressions. text reference: Table 2.2, page 43

  12. Singularity Functions (Part 2) Table 2.2 Six singularity and load intensity functions with corresponding graphs and expressions. text reference: Table 2.2, page 43

  13. Shear and Moment Diagrams Figure 2.10 (a) Shear and (b) moment diagrams for Example 2.8. text reference: Figure 2.10, page 44

  14. Example 2.10 Ø6mm □25mm Ø10mm Figure 2.12 Figures used in Example 2.10. (a) Load assembly drawing; (b) free-body diagram. text reference: Figure 2.12, page 48

  15. Example Se desea transmitir una potencia de 40 CV a través de un eje que gira a 1500 rpm mediante una chaveta de profundidad máxima= 6 mmy L= 12 mm. Datos: eje macizo de Øext=45.

  16. Example 40 CV a 1500 rpm H/2= 6 mmy L= 12 mm.Datos: eje macizo de Øext=45. Determinación de cargas Determinación de esfuerzos Aplicación Criterio de Fallo Determinación del coeficiente de seguridad para un material, en este caso AISI1040 615/380

  17. General State of Stress Figure 2.13 Stress element showing general state of three-dimensional stress with origin placed in center of element. text reference: Figure 2.13, page 49

  18. 2-D State of Stress Figure 2.14 Stress element showing two-dimensional state of stress. (a) Three dimensional view; (b) plane view. text reference: Figure 2.14, page 51

  19. Equivalent Stresses Figure 2.15 Illustration of equivalent stresss states; (a) Stress element oriented in the direction of applied stress. (b) stress element oriented in different (arbitrary) direction. text reference: Figure 2.15, page 52

  20. Stresses in Oblique Plane Figure 2.16 Stresses in oblique plane at angle . text reference: Figure 2.16, page 52

  21. Stresses in Oblique Plane text reference: Shigley pag 28,29

  22. Mohr’s Circle Figure 2.17 Mohr’s circle diagram of Eqs. (2.13) and (2.14). text reference: Figure 2.17, page 55

  23. Mohr’s Circle Example Un elemento con el siguiente estado tensional. Se desea: a) hallar los esfuerzos y las direcciones principales e indicar en el elemento su orientación correcta, con respecto al sistema xy. Se trazará otro elemento en que se muestren T1 y T2, determinando los esfuerzos normales correspondientes y marcando los signos letras. text reference: Shigley, page 31-32

  24. Results from Example Figure 2.18 Results from Example 2.13 (a) Mohr’s circle diagram; (b) stress element for principal normal stresses shown in x-y coordinates; (c) stress element for principal stresses shown in x-y coordinates. text reference: Figure 2.18, page 57

  25. Mohr’s Circle for Triaxial Stress State Figure 2.19 Mohr’s circle for triaxial stress state. (a) Mohr’s circle representation; (b) principal stresses on two planes. text reference: Figure 2.19, page 59

  26. Example 3.5 Figure 2.20 Mohr’s circle diagram for Example 3.5. (a) Triaxial stress state when 1=23.43 ksi, 2=4.57 ksi, and 3=0; (b) biaxial stress state when 1=30.76 ksi and 2=-2.760 ksi; (c) triaxial stress state when 1=30.76 ksi, 2=0, and 3=-2.76 ksi. text reference: Figure 2.20, page 60

  27. Stresses on Octahedral Planes Figure 2.21 Stresses acting on octahedral planes. (a) General state of stress. (b) normal stress; (c) octahedral shear stress. text reference: Figure 2.21, page 61

  28. Normal Strain Figure 2.22 Normal strain of cubic element subjected to uniform tension in x direction. (a) Three dimensional view; (b) two-dimensional (or plane) view. text reference: Figure 2.21, page 64

  29. Shear Strain Figure 2.23 Shear strain of cubic element subjected to shear stress. (a) Three dimensional view; (b) two-dimensional (or plane) view. text reference: Figure 2.23, page 65

  30. Plain Strain Figure 2.24 Graphical depiction of plane strain element. (a) Normal strain x; (b) normal strain y; and (c) shear strain xy. text reference: Figure 2.24, page 66

  31. Circular Bar with Tensile Load Figure 4.10 Circular bar with tensile load applied. text reference: Figure 4.10, page 149

  32. Example text reference: Figure 2.12, page 48

  33. Twisting due to Applied Torque Figure 4.11 Twisting of member due to applied torque. Hipotesis de Coulomb: secciones transversales circulares, permanecen planas. Principio de Saint Venant: secciones transversales no circulares. text reference: Figure 4.11, page 152

  34. Bending of a Bar Figure 4.12 Bar made of elastomeric material to illustrate effect of bending. (a) Undeformed bar; (b) deformed bar. text reference: Figure 4.12, page 156

  35. Elements in Bending Figure 4.14 Undeformed and deformed elements in bending. text reference: Figure 4.14, page 157

  36. Bending Stress Distribution Figure 4.15 Profile view of bending stress variation. text reference: Figure 4.15, page 158

  37. Las secciones más económicas, serán aquellas que tengan el mayor módulo resistente wz, con el menor gasto de material. ¿Calcular b´ tal que tengan el mismo valor de Wx?

  38. Example 4.10 Figure 4.16 U-shaped cross section experiencing bending moment, used in Example 4.10. text reference: Figure 4.16, page 159

  39. Curved Member in Bending text reference: Figure 4.17, page 161

  40. Curved Member in Bending Condición: sumatorio de esfuerzos en el rn=0

  41. Curved Member in Bending

  42. Cross Section of Curved Member Figure 4.18 Rectangular cross section of curved member. text reference: Figure 4.18, page 162

  43. Example: Cross Section of Curved Member • Una sección transversal rectangular de un elemento curvo, tiene las dimensiones: • b= 1´ y h=r0-ri=3´, sometida a un momento de flexión puro de 20000lbf-pulg. • Hallar: • Elemento recto. • Elemento curvo. r=15´. • Elemento curvo. r=3´. text reference: Figure 4.18, page 162

  44. Tabla de Ganchos

  45. Example: Cross Section of Curved Member • Una sección trapezoidal de un elemento curvo, tiene las dimensiones: • ri=10 cm • F= 125 kg • Tadm=1380 Kg/cm2 • Hallar: valor de a. text reference: Figure 4.18, page 162

  46. Development of Transverse Shear Figure 4.19 How transverse shear is developed. text reference: Figure 4.19, page 165

  47. Maximum Shear Stress Table 4.3 Maximum shear stress for different beam cross sections. text reference: Table 4.3, page 168

More Related