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nominal stress is the engineering stress, which is the force divided by the original Area. true stress is the force divided by the area of the deformed specimen as it deforms. Since the area of the deformed specimen is usually smaller than the original area true stress is higher than the nominal stress... Ali D
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What is nominal stress?
direct stress is based on the value obtained by dividing the load by originalcross-sectional area. That is the reason why the value of stress started dropping after neck is formedin mild steel (or any ductile material).But actually as material is stressed itscross-sectional area changes. We should divide load by the actual cross-sectional area to get truestress in the material. To distinguish between the two values we introduce the terms nominal stress and true stress True Stress =Load/ActualCross-sectionalArea Nominal Stress =Load/Original Cross-sectionalArea
Explain why in tensile test the level of the true stress-strain curve is higher than that of engineering stress - stain curve?
see the following questionWhat_the_difference_between_true_strain_and_engineering_strain
What is true size?
it is the nominal size?
You nominal rate the same as true rate?
No. Nominal interest rate is the rate before adjustments for inflation.
What is the differenc between nominal and effective interest rate?
The nominal interest rate is the stated interest rate on a loan or investment without taking inflation or compounding into account. In contrast, the effective interest rate reflects the true cost of borrowing or the actual return on an investment, incorporating the effects of compounding over a specific period. This means that the effective rate is typically higher than the nominal rate when compounding occurs more frequently than annually. Understanding both rates is essential for accurately assessing financial products.
Why is fracture stress less than ultimate tensile strength?
Fracture stress is only less than ultimate tensile strength in an engineering stress-strain diagram. This is because the material will experience a maximum stress before it undergoes necking. After necking, stress will decrease again until the material snaps.
What is the difference between engineering stress and true stress?
The difference between true stress & engineering stress is summarised as follows: Engineering stress assumes that the area a force is acting upon remains constant, true stress takes into account the variation in the cross sectional area as a result of the stress induced deformation (strain) of a material. For example a steel bar in tension once its yield point or stress is reached will start to "neck". Necking is the localized concentration of strain in a small region of the material, causing a reduction in cross sectional area at this point. To calculate the engineering stress in the above case, the applied load is divided by the original cross sectional area, however the true stress would be equal to the load divided by the new deformed cross sectional area. Therefore true stress is likely to be significantly higher than engineering stress. Note that while the material is deforming elastically before the yield point is reached there will be some difference between true and engineering stress (as the material is changing shape) but it will be much smaller than the difference after the yield point is reached. A rock core in a uni-axial compression test will typically expand radially under loading. Therefore in this case, the engineering stress (based on the original diameter) will be larger than the true stress within the material.
Are fall tides are higher than neap tides?
true
How does the price level affect nominal GDP?
The price level directly affects nominal GDP because nominal GDP measures a country's economic output using current prices, without adjusting for inflation. When the price level rises, nominal GDP increases simply due to higher prices, even if the actual quantity of goods and services produced remains unchanged. Conversely, if the price level falls, nominal GDP may decrease even if production levels stay the same. Thus, changes in the price level can distort the true growth of an economy as reflected in nominal GDP figures.
Real GDP is nominal GDP adjusted for inflation true or false?
yes
Why compressive strength is always greater than tensile strength in a beam?
Compressive strength is greater than tensile strength not just in beams, but in metals, concrete, ceramics, ice, and many other materials. Consider a uniaxial test of tension or compression. Because the cross-sectional area of the sample increases with the load, the stress is actually lower than what we would expect from dividing the load by the area of an unloaded sample. The opposite is true for a tension test. The cross section gets smaller with increasing load. Remember this is true regardless of whether the deformations are reversible and elastic or irreversible and plastic. Therefore the nominal compressive strength is greater than the nominal tensile strength even in a perfectly isotropic material.
Suppliers have an incentive to increase output when price is higher than cost of production .true or false?
true
