Applied Statics and Strength of Materials (6th Edition)
6th Edition
ISBN: 9780133840544
Author: George F. Limbrunner, Craig D'Allaird, Leonard Spiegel
Publisher: PEARSON
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Chapter 13, Problem 13.12P
For the beams shown, draw complete shear diagrams.
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Problem 2 (55 pts). We now consider the FEM solution of Problem 1.(a) [5pts] Briefly describe the 4 steps necessary to obtain the approximate solution of thatBVP using the Galerkin FEM. Use the minimum amount of math necessary to supportyour explanations.(b) [20pts] Derive the weak form of the BVP.(c) [10pts] Assuming a mesh of two equal elements and linear shape functions, sketch byhand how you expect the FEM solution to look like. Also sketch the analytical solutionfor comparison. In your sketch, identify the nodal degrees of freedom that the FEMsolution seeks to find.(d) [10pts] By analogy with the elastic rod problem and heat conduction problem considered in class, write down the stiffness matrix and force vector for each of the twoelements considered in (c).(e) [10pts] Assemble the global system of equations, and verbally explain how to solve it.
Chapter 13 Solutions
Applied Statics and Strength of Materials (6th Edition)
Ch. 13 - through 13.6 Calculate the reactions at points A...Ch. 13 - Calculate the reactions at points A and B for the...Ch. 13 - through 13.6 Calculate the reactions at points A...Ch. 13 - Calculate the reactions at points A and B for the...Ch. 13 - Calculate the reactions at points A and B for the...Ch. 13 - Calculate the reactions at points A and B for the...Ch. 13 - Calculate the shear and bending moment at 4 m and...Ch. 13 - Calculate the shear and bending moment at 3 ft and...Ch. 13 - Calculate the shear and bending moment at midspan...Ch. 13 - Calculate the shear and bending moment at 5 ft and...
Ch. 13 - Calculate the shear and bending moment at 5 m and...Ch. 13 - For the beams shown, draw complete shear diagrams.Ch. 13 - For the beams shown, draw complete shear diagrams.Ch. 13 - Prob. 13.14PCh. 13 - For the beams shown, draw complete shear diagrams.Ch. 13 - For the beams shown (next page), draw complete...Ch. 13 - For the beams shown (next page), draw complete...Ch. 13 - For the beams shown (next page), draw complete...Ch. 13 - For the beams shown (next page), draw complete...Ch. 13 - For the beams shown (next page), draw complete...Ch. 13 - For the beams shown, draw complete shear and...Ch. 13 - For the beams shown, draw complete shear and...Ch. 13 - For the beams shown, draw complete shear and...Ch. 13 - A moving-load system is composed of two...Ch. 13 - A moving-load system is composed of two...Ch. 13 - One of the standard truck loads used in the design...Ch. 13 - Write a computer program that will calculate the...Ch. 13 - Write a program that will calculate the shear and...Ch. 13 - Viking Consultants wishes to generate a table of...Ch. 13 - Calculate the reactions for the simple beams...Ch. 13 - Calculate the reactions for the overhanging beams...Ch. 13 - Calculate the reactions at points A and B for the...Ch. 13 - Calculate the reactions at points A and B for the...Ch. 13 - For the beams of Problem 13.33, calculate the...Ch. 13 - For the beam shown, calculate the shear and...Ch. 13 - Calculate the shear and bending moment at points 4...Ch. 13 - Calculate the shear arid bending moment at points...Ch. 13 - Calculate the shear and bending moment at points...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the beam shown and draw complete shear...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - Refer to the indicated problem and draw complete...Ch. 13 - A two-axle roller with axles 5 m apart passes over...Ch. 13 - A moving load system with wheels at fixed...Ch. 13 - A moving-load system with wheels spaced as shown...
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- An aluminum rod of length L = 1m has mass density ρ = 2700 kgm3 andYoung’s modulus E = 70GPa. The rod is fixed at both ends. The exactnatural eigenfrequencies of the rod are ωexactn =πnLqEρfor n=1,2,3,. . . .1. What is the minimum number of linear elements necessary todetermine the fundamental frequency ω1 of the system? Discretizethe rod in that many elements of equal length, assemble the globalsystem of equations KU = ω2MU, and find the fundamentalfrequency ω1. Compute the relative error e1 = (ω1 − ωexact1)/ωexact1.Sketch the fundamental mode of vibration.arrow_forwardProblem 1 (65 pts, suggested time 50 mins). An elastic string of constant line tension1T is pinned at x = 0 and x = L. A constant distributed vertical force per unit length p(with units N/m) is applied to the string. Under this force, the string deflects by an amountv(x) from its undeformed (horizontal) state, as shown in the figure below.The PDE describing mechanical equilibrium for the string isddx Tdvdx− p = 0 . (1)(a) [5pts] Identify the BCs for the string and identify their type (essential/natural). Writedown the strong-form BVP for the string, including PDE and BCs.(b) [10pts] Find the analytical solution of the BVP in (a). Compute the exact deflectionof the midpoint v(L/2).(c) [15pts] Derive the weak-form BVP.(d) [5pts] What is the minimum number of linear elements necessary to compute the deflection of the midpoint?(e) [15pts] Write down the element stiffness matrix and the element force vector for eachelement.arrow_forwardProblem 1 (35 pts). An elastic string of constant line tension1 T is pinned at x = 0 andx = L. A constant distributed vertical force per unit length p (with units N/m) is appliedto the string. Under this force, the string deflects by an amount v(x) from its undeformed(horizontal) state, as shown in the figure below.Force equilibrium in the string requires thatdfdx − p = 0 , (1)where f(x) is the internal vertical force in the string, which is given byf = Tdvdx . (2)(a) [10pts] Write down the BVP (strong form) that the string deflection v(x) must satisfy.(b) [2pts] What order is the governing PDE in the BVP of (a)?(c) [3pts] Identify the type (essential/natural) of each boundary condition in (a).(d) [20pts] Find the analytical solution of the BVP in (a).arrow_forward
- Problem 2 (25 pts, (suggested time 15 mins). An elastic string of line tension T andmass per unit length µ is pinned at x = 0 and x = L. The string is free to vibrate, and itsfirst vibration mode is shown below.In order to find the frequency of the first mode (or fundamental frequency), the string isdiscretized into a certain number of linear elements. The stiffness and mass matrices of thei-th element are, respectivelyESMi =TLi1 −1−1 1 EMMi =Liµ62 11 2 . (2)(a) [5pts] What is the minimum number of linear elements necessary to compute the fundamental frequency of the vibrating string?(b) [20pts] Assemble the global eigenvalue problem and find the fundamental frequency ofvibration of the stringarrow_forwardI need part all parts please in detail (including f)arrow_forwardProblem 3 (10 pts, suggested time 5 mins). In class we considered the mutiphysics problem of thermal stresses in a rod. When using linear shape functions, we found that the stress in the rod is affected by unphysical oscillations like in the following plot E*(ux-a*T) 35000 30000 25000 20000 15000 10000 5000 -5000 -10000 0 Line Graph: E*(ux-a*T) MULT 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Arc length (a) [10pts] What is the origin of this issue and how can we fix it?arrow_forward
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Understanding Shear Force and Bending Moment Diagrams; Author: The Efficient Engineer;https://www.youtube.com/watch?v=C-FEVzI8oe8;License: Standard YouTube License, CC-BY
Bending Stress; Author: moodlemech;https://www.youtube.com/watch?v=9QIqewkE6xM;License: Standard Youtube License