Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 10, Problem 10.23QP
a)
To determine
Draw the graph between load and deflection using spread sheet.
b)
To determine
Plot the proportional limit on the graph.
c)
To determine
The modulus of rupture of the wood specimen.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A wood specimen was subjected to bending until failure by applying a load inthe middle of its span. The specimen has a cross section of 25 mm * 25 mm(actual dimensions) and a span of 350 mm between the simple supports. Theload and the deflection in the middle of the span were recorded as shown inTable P10.22.a. Using a computer spreadsheet program, plot the load–deflectionrelationship.b. Plot the proportional limit on the graph.c. Calculate the modulus of rupture (flexure strength).
Three wooden beams and two steel plates are securely bolted together to form the composite member shown. Using the data given in
the table, determine the largest permissible bending moment when the member is bent about a horizontal axis. Take x = 6.5 in.
Modulus of elasticity
Allowable stress
Wood
2 x 10° psi
2000 psi
2 in. 2 in. 2 in.
Lin.
X
Steel
29 × 10° psi
22,000 psi
The largest permissible bending moment when the member is bent about a horizontal axis is
134.770 kip-in.
In the figure below, a joint is made by gluing two plywood gussets of thickness t to wood boards. The tensile working stresses are 1245psi for the plywood and 725psi for the boards. The working shear stress for the glue is 52psi.
Determine the dimension b so that the joint is as strong as the boards.____________inches in 2 decimal places.
Chapter 10 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 10 - What are the two main classes of wood? What is the...Ch. 10 - Prob. 10.2QPCh. 10 - Prob. 10.3QPCh. 10 - Discuss the anisotropic nature of wood. How does...Ch. 10 - Prob. 10.5QPCh. 10 - Prob. 10.6QPCh. 10 - Prob. 10.7QPCh. 10 - Prob. 10.8QPCh. 10 - Prob. 10.9QPCh. 10 - Prob. 10.10QP
Ch. 10 - Prob. 10.11QPCh. 10 - Prob. 10.12QPCh. 10 - Prob. 10.13QPCh. 10 - Prob. 10.14QPCh. 10 - Prob. 10.15QPCh. 10 - Prob. 10.16QPCh. 10 - Prob. 10.17QPCh. 10 - Prob. 10.18QPCh. 10 - Prob. 10.19QPCh. 10 - Prob. 10.20QPCh. 10 - Prob. 10.21QPCh. 10 - Prob. 10.22QPCh. 10 - Prob. 10.23QPCh. 10 - A wood specimen was prepared with actual...Ch. 10 - A pine wood specimen was prepared with actual...Ch. 10 - Prob. 10.26QPCh. 10 - Prob. 10.27QPCh. 10 - Prob. 10.28QPCh. 10 - Prob. 10.29QPCh. 10 - Prob. 10.30QPCh. 10 - Prob. 10.31QPCh. 10 - Prob. 10.32QPCh. 10 - Prob. 10.33QP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- During an experiment on a square timber specimen 75 mm x 75 mm in cross – section, a shortening deflection of 0.22 mm was recorded on a gauge length L of 300 mm when a load 36 KN was applied. The modulus of elasticity of the timber E will equal to. O a. 8626.3 MPa O b. 8727.3 MPa O C. 8878.3 MPa O d. 8525.3 MPaarrow_forwardThe figure shows a glued joint, known as a finger joint, in a 200 mm. by 25 mm piece of lumber. Find the normal and shear stresses acting on the surface of the joint.arrow_forward3.* Figure 3 shows a tapered glued joint between two pieces of wood subjected to a tensile force. If the glue can sustain a maximum average tensile stress of 30 MPa and/or a maximum average shear stress of 50 MPa, what is the maximum angle that will permit the joint to transmit a tensile force F = 25 kN with a safety factor of 3.0? [Ans: 23⁰] F 1.6 A 3.4 Ө all dimensions in cm Farrow_forward
- The rectangular wood beam is loaded as shown in the figure. What is the maximum bending stress in the beam? * 12 kN. 8 kN/m 150 mm A C 250 mm B 1.0 m 2 m O 10.24 MPa O 5.68 MPa O 15.57 MPa O 0.80 MPaarrow_forwardA wood specimen having a square cross section of 2-inch x 2-inch (actual dimensions) was tested in bending by applying a load at the middle of the span, where the span between the simple supports was 28 inches. The deflection under the load was measured (see below). Plot the load versus deflection relationship. Identify the proportional limit on the diagram. Calculate the modulus of rupture. Does the modulus of rupture truly represent the extreme fiber stresses in the specimen? Comment on the assumptions used to compute the modulus of rupture and the actual response of the wood specimenarrow_forwardA wood specimen was subjected to bending until failure by applying a loadin the middle of its span. The specimen has a cross section of 1 in. * 1 in.(actual dimensions) and a span of 14 in. between the simple supports. Theload and the deflection in the middle of the span were recorded as shown inTable P10.22.a. Using a computer spreadsheet program, plot the load–deflectionrelationship.b. Plot the proportional limit on the graph.c. Calculate the modulus of rupture (flexure strength).arrow_forward
- A 100 mm * 100 mm wood lumber was subjected to bending with a span of 1.5 m until failure by applying a load in the middle of its span. The load and the deflection in the middle of the span were recorded as shown in Table P10.21. a. Using a computer spreadsheet program, plot the load–deflection relationship. b. Plot the proportional limit on the graph. c. Calculate the modulus of rupture (flexure strength).arrow_forwardA 32-mm rebar with a gauge length of 200 mm was subjected to tension to fracture according to ASTM E-8 method. The load and deformation data were as shown in TableUsing a spreadsheet program obtain the following:a. A plot of the stress–strain relationship. Label the axes and show units.b. A plot of the linear portion of the stress–strain relationship. Determine modulus of elasticity using the best-fit approach.c. Proportional limit.d. Yield stress.e. Ultimate strength.f. If the rebar is loaded to 390 kN only and then unloaded, what is the permanent change in length?arrow_forwardProperties: Rod 1 8F D = 40 mm d = 20 mm L = 1.3 meter E = 80 Gpa ROD 1 ROD 2 Rod 2 D = 80 mm d = 20 mm L = 1.0 meters E = 80 Gpa 3F 2. The composite rod shown in the figure is composed of three rods rigidly welded together. Applied forces in terms of "F" are exerted in different parts of the composite rod. Compute the maximum safest value of "F" if the allowable total deformation of the composite rod is limited to 0.50 mm only. ROD 3 2F Rod 3 D = 60 mm d = 20 mm L = 1.2 meters E = 80 GPa 7Farrow_forward
- In the figure below, the wood pole is supported by cables of 0.32-in diameter. The turnbuckles in the cables are tightened until the stress in the cables reaches 60000psi. If the working compressive stress for the wood is 216psi. Determine the smallest permissible diameter of the pole.___________inches in 2 decimal places. Take note: Write it on a paper, hand written showing answer. Thanksarrow_forwardQ: A composite section shown in Figure consisted of a rectangular and triangular sections with a semicirele hole as shown. Locate the centroid (x, y) of this section using the below table. Y 90 mm 10 mm 20 mm 10 mm 60 mm Xị Yi Part Area Ai (mm) (mm) (mm) A, Xi (mm') A, Yi (mm') +Yellow rectangle + Blue triangle - White semicircle Totalsarrow_forwardA wood beam reinforced by an aluminum channel section is shown in the figure. 150 mm 232 mm 38 mm 6.5 mm 163 mm- The beam has a cross section of dimensions 150 mm x 232 mm, and the channel has a uniform thickness of 6.5 mm. If the allowable stresses in the wood and aluminum are 8 MPa and 46 MPa, respectively, and if their moduli of elasticity are in the ratio 1 to 6, what is the maximum allowable bending moment for the beam? Enter the magnitude in kN • m. (Assume that the component parts of the beam are securely bonded by adhesives or connected by fasteners. Also, be sure to use the transformed-section method in the solution.) kN marrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Structural Analysis (10th Edition)Civil EngineeringISBN:9780134610672Author:Russell C. HibbelerPublisher:PEARSONPrinciples of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
- Fundamentals of Structural AnalysisCivil EngineeringISBN:9780073398006Author:Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel LanningPublisher:McGraw-Hill EducationTraffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:9780134610672
Author:Russell C. Hibbeler
Publisher:PEARSON
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:9780073398006
Author:Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning