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A strain gauge rosette attached to an aircraft component fabricated from thin sheet material recorded the...
Question 7 A delta strain gauge rosette (60° angles between gauges) bonded to a magnesium alloy component, measured microstrain readings of 300, -240 and 60. Determine the principal strains and from them the principal stresses and the maximum shear stress at this point on the component (a) using analytical relationships and (b) by using Mohr's circles for strain and stress. The relevant material properties are: E = 80 x 10°N/m², v=0.3.
1) An element in plane strain has a 60° strain rosette that is 150 from the x axis. Use Mohr's circle to determine. E = 29,000 ksi G= 11,200 ksi &=-.0015 E, = .004 E = -0025 a) The principal strains and maximum shear strain. b) Determine the location of the principal strains. c) Determine the stresses from the strains given d) Determine the stresses from the principal strains
Question One (10 marks) A 45° strain gauge rosette is attached to the outer surface of a pressure vessel wall. The measured strain components are: 480x 10, E4s0= 120x10"° and Ego° = 780x10° If the pressure vessel is made of steel with the following material properties: E = 200GP2, G = 75GP2, and S, 350MP2, determine for the point where the strain gauges are attached: a) the maximum shear stress; and b) the percentage of yield in the material.
End of Semester 1, 2018 STEN2002 Civil Engineering Materials (Total Mark for Question 4: 18) Part A - Question 4 7 complicated frame that was difficult to analyse Using a rectangular strain gauge rosette, the actual strains at point A have been recorded while being subjected to test loads. It is necessary to determine the principal stresses and shear stresses in the actual beam subject to the test loads to check whether the stresses assumed in the design of the...
An existing steel beam is in use in a building. Using a rectangular strain gauge rosette, the actual strains at point A have been recorded while being subjected to test loads which simulate crowd loading. It is necessary to calculate the principal stresses to check whether the beam is safe for its current purpose (ie: assess whether the stresses determined are less than the maximum permissible stresses) Figure 4: Strain gauge rosette location and recorded strains In this case it is reasonable...
Part A - Question 3 (Total Marks for Part A - Question 3:20) A steel beam in an industrial structure is part of a complicated frame that was difficult to analyse. Using a rectangular strain gauge rosette, the actual strains at point A have been recorded while being subjected to test loads. It is necessary to determine the normal stresses and shear stresses in the actual beam subject to the test loads to check whether the stresses assumed in the...
The strain rosette shown was used to obtain normal strain data at a point on the free surface of a machine component. Given the values εa= -185 με, εb= -150 με, εc= 55 με, E = 10,800 ksi, and v = 0.33, determine (a) the stress components σx, σy, and τxy at the point. (b) the principal stresses and the maximum in-plane shear stress at the point; on paper, show these stresses on an appropriate sketch that indicates the orientation...
Question 4 - (25 marks) 4a) The 60° strain rosette, shown in Figure 6, -is mounted on a beam. The following readings are obtained from each gauge: Ea= 250 u ; Eb= -400 u ; Ec= 280 u Determine:- (9) i. The in-plane principal strains and their orientation, and ii. The maximum in-plane shear strain and the average normal strain. of the principal plane. (6) b a 60° 60° 60°
18 pts total 10.3-4. A 60-degree rosette has the given strain gauge measurement values. Determine a,b,c) normal strains in x & y directions and xy-shear strain, d) average normal strain, e) maximum physical shear strain (not the radius in Mohr's circle), and f) maximum principal strain. You entered/3pts > = Normal strain in X-direction & (LL inlin) You entered/3 pts > = Normal strain in Y-direction &y (L inlin) J'ou entered/3pts > = Shear strain in XY-plane Yay (L inlin)...
Question 2 I (a) Using a 459 strain gauge rosette placed on a mild steel structure, the following strains were established from the measurements taken:£x = 75x10", Eyy =-115x10-6 = 210 10-6 and Yxy yy (i) Determine the corresponding normal stresses Ox and and shear stress txy. For mild steel, use Young's modulus E= 205 GPa , Poisson's ratio v=0.3 and shear modulus G = 78.8 GPa. [6 marks] (ii) Using the values obtained in (i), determine the principal stresses...