# Register now to access 7 million high quality study materials (What's Course Hero?) Course Hero is the premier provider of high quality online educational resources. With millions of study documents, online tutors, digital flashcards and free courseware, Course Hero is helping students learn more efficiently and effectively. Whether you're interested in exploring new subjects or mastering key topics for your next exam, Course Hero has the tools you need to achieve your goals.

5 Pages

### Final_F01

Course: ASE 324, Fall 2008
School: University of Texas
Rating:

Word Count: 802

#### Document Preview

MATERIALS AEROSPACE LABORATORY (ASE 324L) Final December 14, 2001 2-4 pm WRW 113 Please attempt all four questions. The points assigned to each question are shown in ( ). This is a closed notes/homework/book exam. Space for your answers is provided in this booklet. NAME: Section T W Th (circle one) 1. The compliance matrix of a unidirectional fiber reinforced composite is given by 1 E1 12 E1 0 21...

Register Now

#### Unformatted Document Excerpt

Coursehero >> Texas >> University of Texas >> ASE 324

Course Hero has millions of student submitted documents similar to the one
below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.

Course Hero has millions of student submitted documents similar to the one below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.
MATERIALS AEROSPACE LABORATORY (ASE 324L) Final December 14, 2001 2-4 pm WRW 113 Please attempt all four questions. The points assigned to each question are shown in ( ). This is a closed notes/homework/book exam. Space for your answers is provided in this booklet. NAME: Section T W Th (circle one) 1. The compliance matrix of a unidirectional fiber reinforced composite is given by 1 E1 12 E1 0 21 E2 1 E2 0 0 1 G12 0 E1 = 39, E2 = 8.7,G12 = 3.8 GPa and 12 = 0.28 (a) Describe what experiments you would conduct in order to determine all the quantities in the compliance matrix. (6) (b) Show how the transverse modulus is controlled by the fiber and matrix moduli and the respective fiber volume fractions. (4) (c) The fiber and matrix moduli are 200 and 4 GPa, respectively. Find the volume fraction of fibers that was used in this composite. (3) (d) A panel is subjected to the stress state shown below. The shear stress increases in proportion to the normal stress a through = 1.5 a . Determine the ratio of b : a that should be applied so that the transverse strain is always zero. Determine the levels of a and when the panel fails at a fiber strain of 1.5%. (7) b a a b 2. Shown below are three beams. They are identical except that one is notched and one is cracked. The height and thickness are h=2 in. and b=0.5 in., respectively. The 6M unnotched height h1 = 0.75h . The stress at the root of the notch is n = 2.5 2 due to the bh1 stress concentration there. The stress intensity factor for an edge cracked beam with a 1.12 * 6M crack length a is K = a . 2 bh (a) Determine which of the three beams fails first if one set is made of aluminum and the other steel. Indicate what the dominant failure mechanism is for each each material. (10) Material Toughness (ksiin) 59 31 Yield Strength (ksi) 297 47 Steel Aluminum K . 2r Determine the size of the plastic zone ahead of the cracked steel and aluminum bars and use this information to further explain the results in (a). (10) (b) The normal stress a distance r ahead of a crack is given by = M h M M h h1 M M h h1 M Thickness=b 3. The S-N curve of a material follows the relationship a = fat + b . Nc (a) Explain what the terms in the expression are and how the material properties in it are found. (5) (b) Mean stress effects in this material are accounted for by the Goodman line fat = 1 m . Explain how you would conduct experiments to fat uts determine the effect of mean stress and how it appears on S-N curves. (3) (c) The pressure vessel shown below is subjected to an internal pressure p and an axial compressive force F . It has a radius R = 72in. and wall thickness t = 0.05in. The pressure fluctuates between p0 and zero. The force is R 2 p0 applied continuously at a level F = . The ultimate tensile strength and 2 endurance limit of the material are 140 and 70 ksi, respectively, with b = 200 ksi and c = 0.15. How many more cycles can be applied at p0 = 310 psi if the following pressure/load history has already been applied? (10) Pressure p0 (ksi) 0.25 0.28 0.33 0.36 Cycles 6.96E+05 6.84E+04 1.75E+03 3.37E+02 (d) If F = R 2 p0 , indicate what the main change would be to your calculations in (c) above. (2) Hint: Ignore any potential biaxial stress effects and recall that the axial stress due pR to an internal pressure p is = . 2t t F R F 4. We have all seen windshields that have been struck by a stone. Quite often there are several cracks emanating from the impact zone as shown schematically below (for example, there are 8 cracks in this case). After some time, one crack often dominates and grows out of the star burst zone. Since the driving stress (often residual stress) may be constant, environmentally assisted crack growth is a possible mechanism. (a) Explain how you would characteriz...

Textbooks related to the document above:
Find millions of documents on Course Hero - Study Guides, Lecture Notes, Reference Materials, Practice Exams and more. Course Hero has millions of course specific materials providing students with the best way to expand their education.

Below is a small sample set of documents:

University of Texas - ASE - 324
AEROSPACE MATERIALS LAB (ASE 224L) FINAL EXAM SPRING 1996 Monday, May 13, 9:00 11:00 a.m.Location: ENS 145There are four questions in this exam. The number of points assigned to each question is shown in parenthesis. This is a closed exam, so yo
University of Texas - ASE - 324
AEROSPACE MATERIALS LAB (ASE 224L) FINAL EXAM FALL 1994 Saturday, December 17, 79 p.m.Location: CPE 2.206There are four questions in this exam. The number of points assigned to each question is shown in parenthesis. This is a closed exam, so you
University of Texas - ASE - 324
Why aircraftfailby S. J. Findlay and N. D. HarrisonFailure of an aircraft structural component can have catastrophic consequences, with resultant loss of life and of the aircraft. The investigation of defects and failures in aircraft structures i
University of Texas - KC - 135
Effects of Buoyancy on an Acoustically Pulsed Non-Premixed Laminar Jet FlameFaculty Advisor Dr. Noel Clemens University of Texas Combustion Team Carlos Dostal Phillip Mader Eric Rogstad Tyson Roll Elvis SilvaSpring 2004 Department Visiting Committ
University of Texas - KC - 135
Effects of Buoyancy on an Acoustically Pulsed Non-Premixed Laminar Jet FlameFaculty Advisor Dr. Noel Clemens University of Texas Combustion Team Jerrod Kogut Phillip Mader Eric Rogstad Elvis SilvaWhat is Gravity? Gravity is a form of attraction b
University of Texas - KC - 135
Effects of Buoyancy on an Acoustically Pulsed Non-Premixed Laminar Jet FlameFaculty Advisor Dr. Noel Clemens University of Texas Combustion Team Carlos Dostal Phillip Mader Eric Rogstad Tyson Roll Elvis SilvaMeasurements PresentationOutline
University of Texas - KC - 135
Effects of Buoyancy on an Acoustically Pulsed Non-Premixed Laminar Jet FlameA Fundamental Study of Combustion ScienceUT Combustion TeamThe University of Texas at Austin Department of Aerospace Engineering and Engineering Mechanics W. R. Woolrich
University of Texas - ASE - 369
ASE 369K Measurements and InstrumentationProbability and Statistics for Analysis of Experimental Data Consider a variable u that is a real valued and in the range u . The probability distribution function F (x ) associated with u is defined as
University of Texas - ASE - 369
Sample Mid-TermClosed book section (15 minutes)U1. Define accuracy and precision (use a suitable sketch to illustrate your answer) 2. What is the purpose of calibration? 3. What is meant by the frequency response? Why is it useful to know the fre
University of Texas - DGS - 363
Inorg. Chem. 2002, 41, 3463-3468Carbon Dioxide as a Solubility &quot;Switch&quot; for the Reversible Dissolution of Highly Fluorinated Complexes and Reagents in Organic Solvents: Application to CrystallizationPhilip G. Jessop,*, Marilyn M. Olmstead, Christo
University of Texas - STUDIO - 4
susanne.kraft@austin.utexas.edu 1 FCP DVD Workflow for Standard and High Definition DVDs5/24/07In Final Cut Pro export a quicktime reference movieUse &gt;Current Settings and make sure that Make Movie Self-Contained is uncheckedSave to a l
University of Texas - PROTOOLS - 5
Susanne Kraft skraft@mail.utexas.eduSusanne KraftPage 13/21/07How to set up the 702T or the 744T for Double System Recording for VIDEO1. Turn on the 702T or the 744T 2. Click on MenuUSE THIS TO SELECT3. Select 1) Quick Setup 4. Click on Lo
University of Texas - STUDIO - 4
Susanne Kraft Page 1 HOW TO ONLINE HD Footage IN FINAL CUT PROAdapted from Excerpts by Larry Jordan and Charles Roberts4/24/07Final Cut HD does not reliably create a perfect copy of sequences when onlining. It is often off by a frame either way.
University of Texas - STUDIO - 4
Susanne Kraft Page 1 4/24/07 HOW TO ONLINE DIGIBETA source Footage IN FINAL CUT PROAdapted from Excerpts by Larry Jordan and Charles RobertsFinal Cut HD does not reliably create a perfect copy of sequences when onlining. It is often off by a frame
LSU - CS - 7602
CS 7602 Wireless Networks Project Assignment #1Notes and instructions: 1. This assignment is due on October 31, 6:00pm. 2. This assignment carries 20% of your final grade. 3. This is a individual assignment. You should not collaborate with others. 4
LSU - DA - 07
CSC 3102Advanced Data Structures and Algorithm AnalysisBijaya B. KarkiTuesday and Thursday 12:10 PM to 1:30 PM 132 JC MillerCSC 31020.1B.B. Karki, LSUOffice Hours Instructor: Bijaya B. Karki 1:00 PM to 3:00 PM, Monday and Wednesday Or at
LSU - CSC - 4999
Programming Embedded Interfaces : Project 1 BriefProf. Brygg Ullmer, ullmer@lsu.edu Assigned on February 4, 2005, toward March 4 or 16 final deadline. Summary: Develop the firmware (inclusive serial-based API) + assemble a supporting blade and UI bo
LSU - CSC - 4999
EMBINT CALENDARM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 24-Jan 31-Jan 7-Feb 14-Feb 21-Feb 28-Feb 7-Mar 14-Mar 21-Mar 28-Mar 4-Apr 11-Apr 18-Apr 25-Apr 2-May W 19-Jan 26-Jan 2-Feb 9-Feb 16-Feb 23-Feb 2-Mar 9-Mar 16-Mar 23-Mar 30-Mar 6-Apr 13-Apr 20-A
LSU - CSC - 4999
Programming Embedded InterfacesProf. Brygg Ullmer, ullmer@csc.lsu.edu CSC4999 s16, spring 2005 Mon-Wed-Fri 10:40-11:30, Coates 237 http:/csc.lsu.edu/~ullmer/courses/csc4999/20%: mid-term exam: ~Mar 9 25%: first project (programming PIC blades in C
LSU - APPL - 003
Peer Institutions Parking Fees (Existing)Institution Rank 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Employee Employee Student Visitor Reserved Regular Commuter Annual Annual Annual Hourly \$1,332 \$1,332 \$684 \$2.50 \$1,188 \$303.60
LSU - APPL - 003
LSU - APPL - 003
OFFICE OF FACILITY SERVICESOperating Instruction 6104 Revision 4 Louisiana State University (Baton Rouge) Effective: July 15, 2003 Page 1 of 2 _ SUBJECT: EXCAVATION PERMIT __ Purpose: To provide a method that locates the known underground utilities
LSU - TRB - 82
Delatte and Sehdev Submission Date: November 12, 2002 Word Count: 7,4501Mechanical Properties and Durability of BCO and UTW Concrete Norbert Delatte, Assistant Professor (Corresponding Author) Department of Civil and Environmental Engineering, Th
LSU - ETD - 0130103
CHAPTER 1. INTRODUCTION. VAUDEVILLE IN THE RUSSIAN THEATRE HISTORIOGRAPHY Historical Overview Vaudeville as a theatre genre emerged on the Russian stage around 1812 and became a dominant genre for the next four decades. These decades reveal the illus
LSU - APPL - 003
February 2004 As part of our ongoing effort to reach the goals set forth in our long-range planning, the Office of Student Media makes periodic assessments of our progress. We monitor program growth, advertising/underwriting revenue, and our students
LSU - APPL - 003
Office of Student Media Strategic Plan 2003-2010 Introduction Chancellor Mark Emmert, in his presentation &quot;The Making of a National Flagship University,&quot; identified the most fundamental characteristic of academic distinction as a &quot;collection of highl
LSU - APPL - 003
STRATEGIC PLAN2005-06Department of student mediaLouisiana state university _VISION STATEMENT The Department of Student Media of Louisiana State University seeks to develop a student-run media that is more self-supporting, that provides diverse
University of Texas - ISSUE - 0404
Cutlines a quick referenceThe basicsIn the first sentence, state: Who is doing the action. What is going on. Where and when the action is taking place (provided the sentence isnt too long, then put the when and where in the second sentence). In
LSU - CH - 2
CH 2 DoD 4000.25-7-M~.y.:. ,; ,. .APPENDIX C42 REQUEST FOR SUMMARY LEVEL BILLING ADJUSTMENT Billing Advice Code &quot;42&quot; Duplicate Summary Level Billing Field Legend DI Code Position(s) 1-3 Entry and InstructionsIEnter &quot;FDE&quot; for initial request. E
LSU - I - 773061
Department of DefenseINSTRUCTIONNUMBER 7730.61August 7, 1990DA&amp;MSUBJECT: Reports on General and Flag Officer Positions References: (a) DoD Instruction 7730.61, subject as above, August 20, 1981 (hereby canceled) (b) DoD Directive 5000.11, &quot;Dat
LSU - CH - 4
CH 4 DoD 4000.25-7-MAPPENDIXB1BILLING FOR ISSUE FROM STOCKField Legend Position(s) 1-3 4-6 Entry and Instructions or FA201 C o d e RI C o d eEnter FA1 (charge) (credit).For DoD shipments, enter R I code of the billing office. For GSA, en