By Jianhu (Chris) Shen - WordPress.com · 2017. 10. 7. · Solution‐P3‐3 4. The stress state at...
Transcript of By Jianhu (Chris) Shen - WordPress.com · 2017. 10. 7. · Solution‐P3‐3 4. The stress state at...
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By Jianhu (Chris) Shen
Email: [email protected]: 99250421Office: 10.12.25 (city) 251.2.67 (Bundoora)
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Mode of delivery and consultation Lectures – mainly concepts, methodology, knowledge Tutorials –Practise by solving problems Brief review on lecture notes to be used in tutorialFeedback and comments on previous QuizQuiz on previous tutorialDemonstrate the solution process for tutorial problemsPractise time and answer questions for tutorial problems
My consultations Time Wednesday: 2:00 PM to 4:00 PMOther time, please confirm available with email: [email protected]
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Learning Progress for Structural Analysis
DD/F
Double integration method
Slope/Deflection Equations
BMD/F; SFD/F;
Statics‐FBD
Materials, Geometries, Sections, Applied Load
Section properties
Internal forcesN, Q, M
Equilibrium Eq
Constitutive Eq
Stress Transformation
Shear Stress on Beams
Bending Stress‐Normal
Stress
Safety of an Structure
Strength Rigidity Stability
Deflection
CapacityServiceability
Reliability
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Brief review on lecture notes Stress transformation-planar
-Stress state at one point on structure-Sign conventions-Stress components in different coordinate system with the same origin-Relation between those components
Principal stresses-Maximum normal stress-Maximum shear stress
Application of stress transformation
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Stress state at one point on structure‐planar
Bending stress Shear stress
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All stress components for 3D and planar
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Sign conventions for stress transformation
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Stress components in different coordinate system y
xO x’
y’
O
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Planar stress transformation
Mathematical representation of stress transformation
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Mohr’s Circle
Graphical representation of stress transformation
http://www.ijee.ie/OnlinePapers/Interactive/Philpot/mohr_learning_tool.htm
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In-plane principal stressesMaximum normal stress
Maximum shear stress
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Application of stress transformation
Explain orientation of crack Check grain strength for wood
Explain failure plane Design welding for pressure vessels
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Feedback and comments on Quiz 07‐Bending deflectionOverall PerformanceTotal correct answers (%) 59.46%Total incorrect answers (%) 40.54%Average score (points) 4588.43 points
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Leader BoardQuiz 07‐Bending Deflection
Rank Student No. Name Points Right Answer
1 (1) s3656282 Maglitto Michael Jo 8758 9
2 (2) S3643813 Fong Kee Zhen 8037 8
3 (3) s3668083 Piwowar Jacob Matthew 7392 9
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Most difficult quiz questions
17.0%
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Most difficult quiz questions
36.7%
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Most difficult quiz questions
53.4%
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Select a simple structure/a part of a structure
Approximate the selected structure to statically determinate structure
Simplify geometry, section, loads, supports etc
Section properties SFD/BMD; Bending stress Deflection Shear stress Principle stresses, failure planes
Update on satisfactory progress on your Video Project
Deliveries:Task 1-Photograph with Related Info
Due: 11th August
Task 2- Interim ReportDue: 15th September
Task 3 -Final Report and Video Presentation
Due: 20th October
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Now Quiz Time1. Use the internet explore in your mobile, ipad,
computer etc to explore the following webpagehttp://kahoot.it
2. Using the pin shown in the screen of your teacher to enter the quiz.
3. Please use your student number as your nickname, otherwise we cannot allocate marks to you. After you enter your name, your name should be shown on the screen of your teacher’s computer.
4. Then just wait the teacher to start the quiz.
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Tutorial problem 1 - simple
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Solution‐P1‐1
21
x
y
x'
y'
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Tutorial problem 2 – more complex
22
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Solution‐P2‐1
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Stress state:
Principal stresses-normal stress
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Principal stresses-shear stress:
Average stress:
Solution-P2-2
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Solution‐P2‐3
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Example 3‐application example
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Work out the stress state in structural coordinate system
y
x1. Solve reaction forces
2. Solve bending stress
Solve bending and shear force moment at A:
Solution‐P3‐1
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Solution‐P3‐23. Solve shear stress at A
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Solution‐P3‐34. The stress state at A
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Solution‐P3‐4
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