Answer:
222.5 Gpa
Explanation:
From definition of engineering stress,
where F is applied force and A is original area
Also, engineering strain, where l is original area and is elongation
We also know that Hooke's law states that
Since A=20 mm* 20 mm= 0.02 m*0.02 m
F= 89000 N
l= 100 mm= 0.1 m
By substitution we obtain
Answer:
The biggest expectation of an engineer when he tests out a new design is that he expects the product to not fail, and all the stress and strains does not exceed the failure criteria.
Explanation:
In engineering design, failure of materials is considered, and the designed is usually designed to not reach or exceed the failure region of its stress strain relationship. This is why factor of safety is usually determined for each material, and it serves as a guideline for the designing of new designs. This factor of safety is the value, below which the material properties is able to cope with design stress and strain, and above which failure is likely to occur.
Answer:
The correct answer will be "DC". The further explanation is given below.
Explanation:
- Ohm's law, that also specifies that perhaps the flow of current via the capacitor is equal to the PD (potential difference) between the opposite edges including its conductor while the heat, as well as the other physical state of that same conductor, stay the very same. Throughout the experiment, this linear change in electrical current with such a PD is better identified by changing the difference unidirectional.
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- The linear or dimensional dependency of current onto PD wasn’t simple and easy to grasp. The supply voltage used would also be DC tube.
Answer
For isotropic material plastic yielding depends upon magnitude of the principle stress not on the direction.
Tresca and Von Mises yield criteria are the yield model which is widely used.
The Tresca yield criterion stated that yielding will occur in a material only when the greatest maximum shear stress reaches a critical value.
max{|σ₁ - σ₂|,|σ₂ - σ₃|,|σ₃ - σ₁|} = σ_f
under plane stress condition
|σ₁ - σ₂| = σ_f
The Von mises yielding criteria stated that the yielding will occur when elastic energy of distortion reaches critical value.
σ₁² - σ₁ σ₂ + σ₂² = σ²_f
Answer: 2A
Explanation: Current, i in amperes, A can be got by dividing the charge, Q by time, t
Therefore
i = Q/t
i = 60/30
i = 2A