hi ..
this Q I have asked you to answer it .....
how can I answer it if I have knowing the answer so why I aske you to answer me ...
stress is directly proportional to strain up to the proportional limit. Their ratio is young's modulus.
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.
An infinite amount... for any given Strain, there is a corresponding Stress value. To see what I mean, plot a Stress Strain graph in excel using 10 sets of values, then do another using 20... the one with 20 has a smoother curve, see where I'm coming from?
Brittle materials such as ceramics do not have a yield point. For these materials the rupture strength and the ultimate strength are the same, therefore the stress-strain curve would consist of only the elastic region, followed by a failure of the material.
Theoretically, the yield strength of the material is the stress at which the stress-strain curve stops being linear. In actual testing of most materials, the transition to non-linear is not very clear in that area. The .2% offset line is used to intercept a yield stress for reporting a yield strength. Though arbitrary to a certain extent, it has become the traditional method.
stress strain curve details
when the material fails
stress is directly proportional to strain up to the proportional limit. Their ratio is young's modulus.
The carbon fiber stress-strain curve is important because it shows how carbon fiber materials respond to applied force. By analyzing this curve, engineers can determine the strength, stiffness, and durability of carbon fiber, which are crucial for designing and using these materials in various applications.
By using stress-strain curve.
The elastic limit on a stress-strain curve is important because it represents the point at which a material can deform reversibly without permanent damage. Beyond this limit, the material will undergo permanent deformation or even failure. Understanding the elastic limit helps engineers design structures and materials to withstand stress without breaking.
The stress-strain curve of a rubber band shows how the stress (force applied) and strain (deformation) are related. Initially, as stress increases, strain also increases proportionally. This is the elastic region where the rubber band returns to its original shape when the stress is removed. However, beyond a certain point, the rubber band reaches its limit and starts to deform permanently, known as the plastic region. The relationship between stress and strain on the curve helps us understand the material's behavior under different conditions.
becuase its suppose to
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.
An infinite amount... for any given Strain, there is a corresponding Stress value. To see what I mean, plot a Stress Strain graph in excel using 10 sets of values, then do another using 20... the one with 20 has a smoother curve, see where I'm coming from?
see the following questionWhat_the_difference_between_true_strain_and_engineering_strain
This question probably is referring to a 2% secant modulus, which can be the tensile, flexural or compressive modulus (slope of a stress/strain curve) of a material that is determined from calculating the slope of a line drawn from the origin to 2% strain on a stress/Strain curve.