Yes, Stress is depends upon strain . This relation is easily explained through Hooke’s law. This law states that “the strain in a solid is proportional to the applied stress within the elastic limit of that solid”. ... When a force is applied to a body, after elastic limit the body starts to deform.
Does stress cause strain or strain cause stress?
Stress can cause strain , if it is sufficient to overcome the strength of the object that is under stress. Strain is a change in shape or size resulting from applied forces (deformation). Rocks only strain when placed under stress. Any rock can be strained.
How does stress vary with strain?
Strain is the deformation of a material from stress. It is simply a ratio of the change in length to the original length. Deformations that are applied perpendicular to the cross section are normal strains, while deformations applied parallel to the cross section are shear strains.
Which comes first stress or strain?
Stress strain curve is a behavior of material when it is subjected to load and frm SN curve we can say stress generates only when there is deformation (or it is about to deform) caused by some mechanical or physical forces. Therefore Strain always comes first then only stress generates .
Is stress dependent on strain or vice versa?
In stress-strain curve as strain or the deformation is independent and comes as result of the externally applied force, so it is taken in X-axis. Where as Stress comes in order to resist the deformation in terms of Resisting force. so it is dependent on strain and comes in Y-axis.
What is true stress and true strain?
True stress is the stress determined by the instantaneous load acting on the instantaneous cross-sectional area . True Strain (ε t ): True strain is logarithmic and engineering strain is linear. However it appears to be almost same for small deformation owing to small values in Taylor expansion.
What is true stress-strain curve?
The curve based on the original cross-section and gauge length is called the engineering stress-strain curve, while the curve based on the instantaneous cross-section area and length is called the true stress-strain curve.
How do you interpret a stress-strain curve?
The stress-strain curve also shown the region where necking occurs . Its starting-point also gives us the ultimate tensile strength of a material. Ultimate tensile strength shows the maximum amount of stress a material can handle. Reaching this value pushes the material towards failure and breaking.
What are the three types of strain?
In response to stress, rock may undergo three different types of strain – elastic strain, ductile strain, or fracture .
What are the 3 types of stress?
Common types of stress
There are three main types of stress. These are acute, episodic acute, and chronic stress . We explore each type of stress below.
What is tensional stress?
Tensional stress is the stress that tends to pull something apart . It is the stress component perpendicular to a given surface, such as a fault plane, that results from forces applied perpendicular to the surface or from remote forces transmitted through the surrounding rock.
Why strain is more important than stress?
To begin with these questions, consider the fact that first we have to apply a force to an object and it is only then that the object is observed to have been deformed or strained. Accordingly, one may say that forces produce strains, and therefore, it seems that stress has to be more fundamental.
What is shear strain?
Shear strain is the ratio of displacement to an object’s original dimensions due to stress , and is the amount of deformation perpendicular to a given line rather than parallel to it. ... Shear strain is strain that results from the use of opposing forces in a parallel direction to the surface of an object.
How do you know a true strain?
True strain equals the natural log of the quotient of current length over the original length as given by Eq4. obtained by dividing P by the cross-sectional area A of the deformed specimen becomes apparent in ductile materials after yield has started.
Why is true stress important?
The true stress-strain curve is ideal for showing the actual strain (and strength) of the material . ... In this case, the true stress-strain curve is better. This curve tells the actual state of stress in the material at any point. It also shows strain hardening without being affected by the changing area of the sample.
