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Why true stress higher than the nominal stress?
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
What is true stress and stain?
I'm assuming you mean the difference between true stress and engineering stress: Engineering stress is only accounting for the area given at the time before deformation. True stress accounts for the change in area that occurs as the material is stressed. If you stay in the elastic region, there will be almost no difference between the two.
Why the engineering stress-strain curve in shear is the same as the true stress-strain curve?
The engineering stress-strain curve in shear is the same as the true stress-strain curve because, in shear, the definitions of stress and strain do not change significantly with the material's deformation. True stress accounts for the instantaneous area under load, while engineering stress uses the original area; however, in shear, the relationship remains linear up to the yield point, and the area reduction effect is minimal for typical shear tests. Thus, both curves reflect the same material behavior in shear deformation, leading to equivalent representations.
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 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.
Is it true that engineering is not a career for girls?
It is absolutely not true.
What is the true stress and true strain formula used to calculate the mechanical properties of a material under deformation?
The true stress formula is: True Stress Load / Area The true strain formula is: True Strain ln(Length after deformation / Original Length)
Is ethical rules stress particularism true?
true
True or false Situations that produce stress are called stressors?
True: Stressors is any agent that causes stress to an organism
True or false is stress contributes to a mental disorder?
true
Ulcers in the stomach can develop from stress True or false?
True.
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.
