Maryland, ENME 000
Excerpt: ... Time Aigbe ENME470 Sec. 0101 HW6 - Page 1 of 14 6-1. von Mises Stress Plot Displacement Distribution Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 2 of 14 1st Principal Stress Distribution Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 3 of 14 6-2. Sensitivity Study Results: 6-3. von Mises Stress Distribution (Left) and Displacement Distribution (Right) Plots: Time Aigbe ENME470 Sec. 0101 HW6 - Page 4 of 14 6-4. von Mises Stress Distribution Plot: Deformation Pattern Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 5 of 14 6-5. Temperature Distribution Plot: 6-6. Flow Trajectories: Time Aigbe ENME470 Sec. 0101 HW6 - Page 6 of 14 6-7. CASE 1: Camera dropped on rigid surface Displacement Distribution Plot: von Mises Stress Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 7 of 14 CASE 2: Camera dropped on soft surface Displacement Distribution Plot: von Mises Stress Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 8 of 14 CASE 3: Camera ...
Maryland, ENME 470
Excerpt: ... Time Aigbe ENME470 Sec. 0101 HW6 - Page 1 of 14 6-1. von Mises Stress Plot Displacement Distribution Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 2 of 14 1st Principal Stress Distribution Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 3 of 14 6-2. Sensitivity Study Results: 6-3. von Mises Stress Distribution (Left) and Displacement Distribution (Right) Plots: Time Aigbe ENME470 Sec. 0101 HW6 - Page 4 of 14 6-4. von Mises Stress Distribution Plot: Deformation Pattern Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 5 of 14 6-5. Temperature Distribution Plot: 6-6. Flow Trajectories: Time Aigbe ENME470 Sec. 0101 HW6 - Page 6 of 14 6-7. CASE 1: Camera dropped on rigid surface Displacement Distribution Plot: von Mises Stress Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 7 of 14 CASE 2: Camera dropped on soft surface Displacement Distribution Plot: von Mises Stress Plot: Time Aigbe ENME470 Sec. 0101 HW6 - Page 8 of 14 CASE 3: Camera ...
Purdue, SOC 220
Excerpt: ... 2008_01_09 Lecture 2: Introduction continued Wednesday, January 09, 2008 1:38 PM Durkheim - Anomie Skeptical of psychology and capitalism Favored looking at macro level Suicide studies Suicide rates w/in countries tended to be stable Variation between countries and regions (southern regions had lower suicide rates) Upward trend across negative dependent variables Anomie High social density = small town, everyone knows each other Low social density = urban area Social norms stronger in high social density - according to Durkheim, this is good, as it reduces anomie, (deviance, crime, suicide) Small, close knit communities => + Social density => +Social norms => -anomie => + anomic suicide C. Wright Mills - The Sociological Imagination Start w/ your own life, mindset, experiences, broaden to friends, examining problems and issues Take these problems to the societal level, looking for societal reasons Ludwig Von Mises - Human action Austrian free-market economist Wrote the book Human Action Arg ...
Michigan State University, ME 475
Excerpt: ... xamine the results. For each mesh density, record the predicted maximum (tensile) and minimum (compressive) von Mises stresses and maximum 2-component of displacement (magnitude). Once all of these values are recorded, plot the stresses and displacement versus number of nodes in the model. The number of nodes can be found by opening the input deck (the *.inp file) and finding the keyword toward the top that starts with *Node. The next keyword should be *Element, search for this. The line above will be the last node written, and the first value is the number of nodes in your model. This is because Abaqus/CAE starts its node numbering from 1, and numbers sequentially. Not all preprocessors do this. For the most refined mesh (seed of 0.003 m), the largest node number will be 19257. Note our educational license of Abaqus is limited to 20,000 nodes. Model Validation: The connecting lug is not too dissimilar from a cantilevered beam with a rectangular crosssection and similar dimensions. Perform this calculation a ...
Alabama, ME 383
Excerpt: ... .5 15 lf Example 2 = 100,000 0.5 psi Calculate True and Engineering =n UTS at necking n 0.5 = Kn = 1 00,000( 0.5) = 70710 A0 = n = 0.5 Aneck = A0 e -0.5 ln A neck P = A = A0 e -0.5 P = 42,850 A0 UTS P = = 42,850 psi A0 16 End Questions ? 17 Today's Lecture Stress-Strain State: Hooke's Law Yield Criteria: 1) Tresca 2) von Mises Effective Stress and Strain Work of Deformation and Temperature Case Studies 18 Stress State - Triaxial Stress Equilibrium: Principal Stress 1 2 3 M F =0 i i =0 3 1 2 19 Strain State - Triaxial Strain Principal Strain 1 2 3 3 1 2 20 Stress-Strain Relationship in Triaxial State Generalized Hooke's Law 1 1 = [ 1 - ( 2 + 3 ) ] E 1 2 = [ 2 - ( 1 + 3 ) ] E 1 3 = [ 3 - ( 1 + 2 ) ] E Example: In Tension, = = 0 2 3 1 1 = E 1 2 = 3 = - E 21 Yield Criteria Tresca max( 1 - 2 , 2 - 3 , 1 - 3 ) = y von Mises ( 1 - 2 ) 2 + ( 2 - 3 ) + ( 1 - 3 ) = 2 y 2 2 2 Difference < 15% ...
University of Michigan, MECHENG 382
Excerpt: ... ME 382 Lecture 10 Safety factor on stress = Ratio uniaxial yield stress to effective normal stress Safety factor on pressure = Ratio of pressure that would cause yield / pressure Safety factor on thickness = Ratio of thickness / thickness that would yield Sf > 1 (for design against failure) In this example: Safety factor against yield ! S = 500 MPa & Y = 760 MPa Safety factor against yield: Sf = Y/ ! S =760/500 = 1.5 Example: Plane stress 3 = 0 - conditions for yield with different values of 1 and 2? (i) If 1 & 2 > 0 or if 1 & 2 < 0 (a) (b) If ! 2 < ! 1 yield if ! 1 " ! y If ! 2 > ! 1 yield if ! 2 " ! y (ii) If 1 > 0 & 2 < 0 or if 1 < 0 & 2 > 0 Yield if ! 1 " ! 2 # ! y We can draw a yield surface for 3= 0 (Can also do this in 3-D if 3 0) Experiments indicate that an ellipse describes yielding better 26/ix/07 3 ME 382 Lecture 10 This observation leads to von Mises yield criterion Von Mises yield criterion (Octahedral shear stress criterion ...
N.C. State, MAT 450
Excerpt: ... Plasticity (Ch. 3 sections : 3-1 to 3-6; 3-8) Multiaxial Loading - Tresca and von-Mises yield criteria - Plastic flow under uniaxial loading : o is the uniaxial yield strength 3-1 to 3-3 : true vs : note during plastic flow volume is conserved ( = 0) : = V = 1+2+3 = x+y+z = 0 V (Eq. 3-5) -note contrast with elasticity- recall from Hookes law : = x+y+z = 1 2 ( x + y + z ) so for =0, =0.5 here. E A l - constancy of volume implies Al = Aolo so that = ln( ) = ln( o ) lo A 3.4 yield criteria multiaxial loading (ij) : (a) von Mises (distortion criteria) define eff = 1 {(1 2 ) 2 + ( 2 3 ) 2 + (3 1 ) 2 }1/ 2 2 1 (Eq. 3-12) if eff = o, yield occurs these are principal stresses, and in terms of all 6 components Eq. 3-13 : eff = 2 {( x y ) 2 + ( y z ) 2 + ( z x ) 2 + 6( 2xy + yz + 2 )}1/ 2 zx 2 - distortion energy, leading to change of shape, reaches ...
Michigan State University, ME 471
Excerpt: ... Cover Page Finite Element Project BRACKET DESIGN AUTHOR: _STUDENT ID _ RESULTS Problem 1: Reference Design Coarse Mesh Amount of material (in ) Number of Elements Number of Nodes Disp of point X (in) 3 Fine Mesh Max Von Mises (psi) Problem 2: Design Variation Coarse Mesh Amount of material (mm ) Number of Elements Number of Nodes Disp of point X (in) 3 Fine Mesh Max Von Mises (psi) Checklist Original Plots Mesh Displacement Von Mises stress Title set to yourname Original work performed independently by _ signature ...