engineering practicum baltimore polytechnic institute m. scott a single iron rod, radius r, has a...
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![Page 1: Engineering Practicum Baltimore Polytechnic Institute M. Scott A single iron rod, radius R, has a critical buckling load B and a tensile fracture force](https://reader036.vdocuments.mx/reader036/viewer/2022082817/56649e605503460f94b5a8e5/html5/thumbnails/1.jpg)
Engineering Practicum Baltimore Polytechnic Institute M. Scott
• A single iron rod, radius R, has a critical buckling load B and a tensile fracture force Tmax = T
• If you bond together seven such rods in the following two configurations, what will be their new failure loads? Explain your answers.
a)
b)
11-29-10 Drill
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Engineering Practicum Baltimore Polytechnic Institute M. Scott
1. ASTM A36 steel has an ultimate tensile strength of 400 MPa and a Young’s Modulus of 200 GPa. If you create 1 m long rods of the following configurations, what will be their critical buckling and tensile fracture loads?
R = 1 cm R = 2 cm Ro = 2 cmRi = 1 cm
R = 1 cm
Additional Problems
AB
C D
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Engineering Practicum Baltimore Polytechnic Institute M. Scott
• How would you solve for these two configurations?
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Engineering Practicum Baltimore Polytechnic Institute M. Scott
2. With a 5% uncertainty in each measured value, what is the uncertainty that propagates through your calculations to your final answers?
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Engineering Practicum Baltimore Polytechnic Institute M. Scott
3. Now at a cost of $1 per pound and a density of 7.8 g/cm3, what is the difference in costs among the four configurations?
R = 1 cm R = 2 cm Ro = 10 cmRi = 7.5 cm
R = 1 cm
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Engineering Practicum Baltimore Polytechnic Institute M. Scott
Materials Test Wednesday
• Anything covered in lecture and lab• A couple error/uncertainty problems• Multiple choice, matching, short answer
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Engineering Practicum Baltimore Polytechnic Institute M. Scott
Materials ReviewObjectives
1. Review major concepts from materials lecture and materials lab
2. Understand the implications of material properties and tension/compression equations on design
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Engineering Practicum Baltimore Polytechnic Institute M. Scott
• Review PowerPoint “U2-2 Materials 2”