Procedure:1. Measure the dimensions of the specimen and the record them in the date sheet2. Turn the specimen on its side with respect to its position as molded and center in on life supportblocks.3. Center the loading system in relation to the applied force.4. Bring the load applying-block in contact with the surface of the specimen at the center andapply a load between 3 and 6% of the estimated load.5. Grind cap, or use leather shims on the specimen contact surface to eliminate any gap in excessof 0.004 inch (0.10 mm). Gaps in excess of 0.15 inch (0.38 mm) shall be eliminated by cappingor grinding.6. Apply the load on the specimen continuously and without shock. The load shall be applied atthe constant rate to the breaking. Apply the load at such a rate that constantly increases theextreme fiber stresses between 125 and 175 psi/min. (0.86 and 1.21 MPa/min) when calculateduntil rupture occurs.7. Take three measurements across each dimension (one at each edge and at the center) to thenearest0.05 in. (1 mm) to determine the average width and depth of the specimen at the pointof fracture. If the fracture occurs at a capped section, include the cap thickness in measurement. Calculation:For center Loading:MR = 3PL / 2bd?Where:MR- modulus of rupture, psi (MPa)P= maximum load applied as indicated by testing machine, in Ib (N)L= span length, in inches (mm)b= average width of specimen in inches (mm)d= average depth of specimen, at the fracture, in inches (mm)Note: The weight of the beam is not included in the above calculation.Tabulated Data and ResultSample No.L (mm)B (mm)D (mm)P (N)MR (MPa)145015015023000245015015021000345015015019000

Answered: Image /qna-images/answer/65d5585a-ed1c-4334-9e9c-11b0f52b2c9b.jpg

Calculation: For center Loading: MR = 3PL / 2bd? Where: MR- modulus of rupture, psi (MPa) P= maximum load applied as indicated by testing machine, in Ib (N) L= span length, in inches (mm) b= average width of specimen in inches (mm) d= average depth of specimen, at the fracture, in inches (mm) Note: The weight of the beam is not included in the above calculation. Tabulated Data and Result Sample No. L (mm) В (mm) D (mm) P (N) MR (MPa) 1 450 150 150 23000 450 150 150 21000 3 450 150 150 19000

Calculation: For center Loading: MR = 3PL / 2bd? Where: MR- modulus of rupture, psi (MPa) P= maximum load applied as indicated by testing machine, in Ib (N) L= span length, in inches (mm) b= average width of specimen in inches (mm) d= average depth of specimen, at the fracture, in inches (mm) Note: The weight of the beam is not included in the above calculation. Tabulated Data and Result Sample No. L (mm) В (mm) D (mm) P (N) MR (MPa) 1 450 150 150 23000 450 150 150 21000 3 450 150 150 19000

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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