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Assigned: 5/26 Due: Tuesday 5.31
Review: Design of simple structures
1. Determine the required dimension h of
member BC and the required diameter of the
pins at A and B given that the allowable normal
stress in BC is 3.0 ksi and the
Defects and Dislocations
Crystalline Material: atoms arranged in perfect order;
repetitive three-dimensional pattern
Such materials dont exist all contain number of defects
Defects effect material propertie
Think about various reasons due to which the device (or)
equipment may fail
Identify and understand the failure mechanism
Propose ways to prevent failure
Two Types of Failure Mechanisms:
Statically Determinate Problems
Problems 1 & 2 are from Beer, Johnston, DeWolf and Mazurek, 7/e [scanned copies follow]
1. 2.7 ALSO: indicate the resulting strain in the rod in units of micr
Mechanical Properties of Metals
Structural organization of atoms and molecules govern the
properties of a material (e.g. soft and ductile vs. hard and
Mechanics of Materials
4 Problems on 4 Pages
One 8- 11 sheet of notes may be used. No other notes or textbooks may be referenced.
Students may not share notes sheets.
A scientific calculator may be used. It
Homework 1: Review of Statics, Intro. to Stress
1. Bar AB is supported by a frictionless wheel
resting against a ramp at A and by a pin at B.
Two external loads are applied: a 390 lb point
EXAM REVIEW #1
The first exam, covering Chapters 1, 2 and 3 (plus necessary review material from statics as covered in class and on the
homework assignments), will be held on Tuesday, June 7 at the beginning of class. The exam will last for 1h
Name: 4/ MAE 308301 Exam 1, Page 1
l. Q/ths) Consider the loaded Lshaped member CAB shown in the sketch. It is supported at point A by a
pinned connection to a bracket that cannot move in either the horizontal or vertical directions and by
Uniform road AB has axial stiffness EA and a length L when unstressed. The bar is xed at
point A, and an initial gap s exists between point B and the wall before load is applied.
a) Determine the minimum force P that must be applied at point C for point B
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Bar AB is supported by a frictionless wheel resting against a ramp atA and by a pin at B. Two external
loads are applied: a 390 lb point force and a 800 lb-ft couple, as shown.
a) Draw a clear, completely labeled Free Body Diagram (FBD) of barAB.
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Problems 1-3 are from Beer, Johnston and DeWolf, 7th ed, Ch. 1 [Scanned copies of these
problems are included at the end of the assignment page for your convenience.]
All problems must inclu
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NOTE: Exam 1 is scheduled for Tuesday, June 7 at the beginning of class.
Chapter 2 Review: Statically indeterminate problem:
1. Uniform road AB has axial stiffness EA and a length L when unstressed.
I have neither received nor given help on this exam. Signature _
Golf club manufacturers are examining the possibility of replacing some titanium (Ti) clubheads with Ti carbide.
1) A) (2 pts.) What kind of defect or dislocation does a carb