EBK MANUFACTURING PROCESSES FOR ENGINEE
6th Edition
ISBN: 9780134425115
Author: Schmid
Publisher: YUZU
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Chapter 2, Problem 2.5Q
To determine
To choose between compression and tension that requires higher capacity testing machine.
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Your manager asked you to explain the difference between three-point bending test and four-pointbending test by using a standard specimen each one has the following dimensions:1. Force = 30 KN.2. Thickness= 5 cm.3. Width = 10 cm.4. Length = 25 cm.Calculate the stress on each specimen then justify your answer
Tensile test is a method to investigate the elasticity of a material. A test specimen is placed between two clamps and these clamps will move in opposite directions, hence straining the test specimen. This experiment will yield a stress-strain curve that shows each of the stages of the specimen for every load is applied.
With an aid of sketching diagrams, describe the stages that the specimen experiences before it breaks, and relate it with the stress-strain curve. It is expected that each stage comes with a sketching of the specimen and explanation of the current stage.
At operating stress of 420MPa, the number of cycles to fail a specimen is 65
cycles. At operating stress of 360MPa, the number of cycles to fail the
specimen is 390 cycles, and at operating stress of 130MPa, the number of
cycles to fail the specimen is 11,900 cycles. A test sequence as follows is
designed: first, operating stress of 420MPa for 7 cycles, second, operating
stress of 360MPa for 65 cycles, and third, operating stress of 130MPa for 325
cycles. Determine at what number of cycle and which operating stress level
the specimen would be expected to fail if the above sequence is repeated.
Chapter 2 Solutions
EBK MANUFACTURING PROCESSES FOR ENGINEE
Ch. 2 - Prob. 2.1QCh. 2 - Prob. 2.2QCh. 2 - Prob. 2.3QCh. 2 - Prob. 2.4QCh. 2 - Prob. 2.5QCh. 2 - Prob. 2.6QCh. 2 - Prob. 2.7QCh. 2 - Prob. 2.8QCh. 2 - Prob. 2.9QCh. 2 - Prob. 2.10Q
Ch. 2 - Prob. 2.11QCh. 2 - Prob. 2.12QCh. 2 - Prob. 2.13QCh. 2 - Prob. 2.14QCh. 2 - Prob. 2.15QCh. 2 - Prob. 2.16QCh. 2 - Prob. 2.17QCh. 2 - Prob. 2.18QCh. 2 - Prob. 2.19QCh. 2 - Prob. 2.20QCh. 2 - Prob. 2.21QCh. 2 - Prob. 2.22QCh. 2 - Prob. 2.23QCh. 2 - Prob. 2.24QCh. 2 - Prob. 2.25QCh. 2 - Prob. 2.26QCh. 2 - Prob. 2.27QCh. 2 - Prob. 2.28QCh. 2 - Prob. 2.29QCh. 2 - Prob. 2.30QCh. 2 - Prob. 2.31QCh. 2 - Prob. 2.32QCh. 2 - Prob. 2.33QCh. 2 - Prob. 2.34QCh. 2 - Prob. 2.35QCh. 2 - Prob. 2.36QCh. 2 - Prob. 2.37QCh. 2 - Prob. 2.38QCh. 2 - Prob. 2.39QCh. 2 - Prob. 2.40QCh. 2 - Prob. 2.41QCh. 2 - Prob. 2.42QCh. 2 - Prob. 2.43QCh. 2 - Prob. 2.44QCh. 2 - Prob. 2.45QCh. 2 - Prob. 2.46QCh. 2 - Prob. 2.47QCh. 2 - Prob. 2.48QCh. 2 - Prob. 2.49PCh. 2 - Prob. 2.50PCh. 2 - Prob. 2.51PCh. 2 - Prob. 2.52PCh. 2 - Prob. 2.53PCh. 2 - Prob. 2.54PCh. 2 - Prob. 2.55PCh. 2 - Prob. 2.56PCh. 2 - Prob. 2.57PCh. 2 - Prob. 2.58PCh. 2 - Prob. 2.59PCh. 2 - Prob. 2.60PCh. 2 - Prob. 2.61PCh. 2 - Prob. 2.62PCh. 2 - Prob. 2.63PCh. 2 - Prob. 2.64PCh. 2 - Prob. 2.65PCh. 2 - Prob. 2.66PCh. 2 - Prob. 2.67PCh. 2 - Prob. 2.68PCh. 2 - Prob. 2.69PCh. 2 - Prob. 2.70PCh. 2 - Prob. 2.71PCh. 2 - Prob. 2.72PCh. 2 - Prob. 2.73PCh. 2 - Prob. 2.74PCh. 2 - Prob. 2.75PCh. 2 - Prob. 2.76PCh. 2 - Prob. 2.78PCh. 2 - Prob. 2.79PCh. 2 - Prob. 2.80PCh. 2 - Prob. 2.81PCh. 2 - Prob. 2.82PCh. 2 - Prob. 2.83PCh. 2 - Prob. 2.84PCh. 2 - Prob. 2.85PCh. 2 - Prob. 2.86PCh. 2 - Prob. 2.87PCh. 2 - Prob. 2.88PCh. 2 - Prob. 2.89PCh. 2 - Prob. 2.90PCh. 2 - Prob. 2.91PCh. 2 - Prob. 2.92PCh. 2 - Prob. 2.93PCh. 2 - Prob. 2.94PCh. 2 - Prob. 2.95PCh. 2 - Prob. 2.96PCh. 2 - Prob. 2.97PCh. 2 - Prob. 2.98PCh. 2 - Prob. 2.99PCh. 2 - Prob. 2.100PCh. 2 - Prob. 2.101P
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- There may be cases where an extensometer is used in the metal tensile test and cases where it is not. At this time, explain the part where the most difference appears in analyzing the results of the two experiments.arrow_forwardIn what situations would you use a hardess test instead of a Tensile test?arrow_forwardThe measured value of %El for a metal in a tensile test (Test 1) = 25%. The gauge length of the tensile sample was 50 mm. The same metal was tested in tension (Test 2) using a gauge length of 25 mm. The measured %El = 30%. Determine the AL after necking for Test 1. Show all workarrow_forward
- 5) Extensometer in the Universal Testing Machine is used to measure the deformation on the experimental specimen. Select one: True Falsearrow_forwardThe results of a tensile test are: Diameter of the specimen Gauge length Load at limit of Proportionality Extension at the limit of Proportionality Maximum Load : 10mm :40 mm :80kN : 0.06mm. :100 kN Calculate ultimate tensile stress and young's modulus.arrow_forwardWhich one of the following is the correct definition of ultimate tensile strength, as derived from the results of a tensile test on a metal specimen: O the stress encountered when the stress strain curve transforms from elastic to plastic behavior the maximum load divided by the final area of the specimen the maximum load divided by the original area of the specimen O the stress observed when the specimen finally failsarrow_forward
- What are the benefits of performing the tension test?aarrow_forwardQUESTION ONE (a) Distinguish between physical and mechanical properties of materials. Give two examples of each. (b) Explain why in a stress versus strain curve, the plastic portion of the graph after necking tends to drop (ie the force drops) despite that the tension is increasing. (c) A tensile test uses a copper test specimen that has a gauge length of 80 mm and a di.ameter of 16 mm. During the test, the specimen yields under a load of 9,600 N. The corresponding gauge length is 80.24 mm. The maximum load reached is 148,000 N at a gauge length of 94.2 mm, while fracture happens at a load of 12,800 N and a gauge length of 102 6 mm Determine the following: (i) Modulus of elasticity E (ii) Yield strength Oy (iii) Fracture strength, ơt (iv) Tensile strength OTs. 1arrow_forwardThe results of a tensile test are: Diameter of the specimen Gauge length Load at limit of Proportionality Extension at the limit of Proportionality Maximum Load : 10mm :40 mm : 70kN :0.08mm. :100 kN Calculate stress at limit of proportionality and young's modulus.arrow_forward
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