Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 11, Problem 11.4P
To determine
The length of internal cracks.
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A 150mm diameter cylindrical concrete specimen was tested for compressive strength. What would be the maximum applied force in kN when the stress at failure is 41.4 MPa?
A center point loading is used to test concrete for flexure. The sample is 150mm x 150mm and has a clear span of 600mm. The sample failed when the load applied is 100,000N. What is the flexure stress at failure in MPa?
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Chapter 11 Solutions
Materials Science And Engineering Properties
Ch. 11 - Prob. 1CQCh. 11 - Prob. 2CQCh. 11 - Prob. 3CQCh. 11 - Prob. 4CQCh. 11 - Prob. 5CQCh. 11 - Prob. 6CQCh. 11 - Prob. 7CQCh. 11 - Prob. 8CQCh. 11 - Prob. 9CQCh. 11 - Prob. 10CQ
Ch. 11 - Prob. 11CQCh. 11 - Prob. 12CQCh. 11 - Prob. 13CQCh. 11 - Prob. 14CQCh. 11 - Prob. 15CQCh. 11 - Prob. 16CQCh. 11 - Prob. 17CQCh. 11 - Prob. 18CQCh. 11 - Prob. 19CQCh. 11 - Prob. 20CQCh. 11 - Prob. 21CQCh. 11 - Prob. 22CQCh. 11 - Prob. 23CQCh. 11 - Prob. 24CQCh. 11 - Prob. 25CQCh. 11 - Prob. 26CQCh. 11 - Prob. 27CQCh. 11 - Prob. 28CQCh. 11 - Prob. 29CQCh. 11 - Prob. 30CQCh. 11 - Prob. 1ETSQCh. 11 - Prob. 2ETSQCh. 11 - Prob. 3ETSQCh. 11 - Prob. 4ETSQCh. 11 - Prob. 5ETSQCh. 11 - Prob. 6ETSQCh. 11 - Prob. 7ETSQCh. 11 - Prob. 8ETSQCh. 11 - Prob. 9ETSQCh. 11 - Prob. 10ETSQCh. 11 - Prob. 11.1PCh. 11 - Prob. 11.2PCh. 11 - Prob. 11.3PCh. 11 - Prob. 11.4PCh. 11 - Prob. 11.5PCh. 11 - Prob. 11.6PCh. 11 - Prob. 11.7PCh. 11 - Prob. 11.8PCh. 11 - Prob. 11.9PCh. 11 - Prob. 11.10PCh. 11 - Prob. 11.11PCh. 11 - Prob. 11.12PCh. 11 - Prob. 11.13PCh. 11 - Prob. 11.14P
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- Determine the cracking moment of a rectangular concrete beam that is 18-inches tall and 6-inches wide. Take f’c as 5000 psi. What is the moment of inertia (Ig) of the beam if during a flexure test, the tension face of the beam developed a 2-inch deep crack, but was quickly unloaded and did not completely fail?arrow_forwardA concrete test cylinder is 150mm in diameter and 300mm in length. During an axial compression test the diameter increased by 0.1399 mm and the length decreased by 0.397 mm. The concrete has an ultimate compressive strength of 21Mpa, Ec=20,000Mpa. Compute the compressive load that caused the above deformationsarrow_forward100mm diameter cylindrical concrete specimen was tested for compressive strength. The sample failed when a maximum applied force was 200,000N. What is the stress at failure of the specimen in MPa?arrow_forward
- Determine the cracking moment of a rectangular concrete beam that is 18-inches tall and 6-inches wide. Take f’c as 5000 psi. Next, draw the normal stress distribution through the cross-section of the beam and label the minimum and maximum stresses on the normal stress distribution Diagram. What is the new moment of inertia (Ig) of the beam if during a flexure test, the tension face of the beam developed a 2-inch deep crack, but was quickly unloaded and did not completely fail?arrow_forwardDetermine the cracking moment of a rectangular concrete beam that is 18-inches tall and 6-inches wide. Take f’c as 5000 psi. Next draw the normal stress distribution through the cross section of the beam and label the minimum and maximum stresses on the normal stress distribution diagram.arrow_forwardA concrete specimen with b = d is supported at both ends 600mm apart. It is tested for flexure strength with load at midspan of 100kN and failed with a flexural stress of 52.083 MPa. What is the dimension b and d of the specimen in mm?arrow_forward
- A cylindrical block of concrete is 300mm long and has a circular cross section of 100mm in diameter. It carries a total compressive load of 67KN and under this load contract 0.2mm. Estimate the compressive stress and strain .arrow_forwardA certain concrete beam has the following data: Cracked Moment of Inertia, I¬cr = 7,800 x 10^6 mm^4 Grossed Moment of Inertia, Ig = 9,000 x 10^6 mm^4 Applied Moment, Ma = 80 kN-m Cracking Moment, Mcr = 100 kN-m 28. Determine the effective moment of inertia.arrow_forwardThe cantilever-reinforced concrete beam shown in Figure 1 is subjected to a uniform load (including beam weight) and a concentrated load at the free end of the beam. 1.) Determine the cracking moment capacity, . 2.) Calculate the maximum unfactored applied moment and state whether the concrete beam has cracked under the applied loads. 3.) Compute the maximum compressive stress of concrete at the bottom of the beam and the maximum tensile stress at the centroid of the steel bars. Can you work it out and show all the steps on paper, and any other helpful little steps to explain the process.arrow_forward
- The cross section of a beam constructed using Grade 50 concrete (Ec = 34800 MPa) is 300 mm x 450 mm (b x D) as shown in figure 1. Assuming d = 390 mm, Esteel = 200 GPa and the beam behaves elastically, determine the following: 1. Use the transformed method to determine position of neutral axis and cracking moment Mcr. 2. Determine the maximum concrete and steel stresses produced by a positive bending moment of 40 kNm in the uncracked section.arrow_forwardA concrete cylinder of diameter 150mm and length 300mm when subjected to an axial compressive load of 240KN resulted in an increase of diameter by 0.127mm and a decrease in length of 0.28mm.compute the values 1.poison ratio 2.modulus elasticityarrow_forwardA cylindrical steel pressure vessel 500 mm in diameter with a wall thickness of 25 mm, is subjected to an internal pressure of 6.5 MN/m2. (a) Calculate the tangential and longitudinal stresses in the steel. (b) To what value may the internal pressure be increased if the stress in the steel is limited to 120 MN/m2? (c) If the internal pressure were increased until the vessel burst, sketch the type of fracture that would occurarrow_forward
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