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Stress is the load per unit area acting within a material. It can be thought of as the internal resistive response of a material to an externally applied pressure.
Strain is the change in shape of an object in response to external pressure or internal stress. To complicate matters, strain causes the transmission of stress through an object (as in simple terms the strain causes an internal "movement" causing one part of the inside of an object to press against the material next to it generating stress in this region, this in turn can cause more strain and so on!).
There are a number of differing types of strain, for example axial strain is defined as the change in length relative to the original length of an object (e.g. a steel wire being stretched). This change in shape is also called deformation. Volumetric strain occurs when an object is squashed or pulled on all sides leading to a change in volume.
Wiki User
∙ 11y ago
Wiki User
∙ 15y agoStress is load per unit Area Its unit is N/M2 in SI system And Strain is Change in Dimension(dL) Divided by Original Dimension(L). dL/L. Its a dimensionless quantity. When a body is loaded within its elastic limit Stress is directly preportional to strain.
Wiki User
∙ 11y agoStress is the force that causes deformation of an object.
Strain is the deformation caused by stress on the object.
Wiki User
∙ 11y agosimply that is hooks law i..e stress is proportional to the strain.
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What is the difference between E and nu in engineering geology?
E is generally taken to be the elastic constant known as Young's modulus which describes the relationship between axial stress and axial strain where Hooke's law still applies (i.e. linear elasticity). Nu is Poisson's ratio which is the relationship between axial strain and radial or transverse strain. For more information, please see the related link.
What is relastion between strees and strain?
In material science, strain does not depend on stress; rather it's the reverse. Stress is proportional to strain, as stated by Hooke's Law, until the material reaches its elastic limit.
Is the ratio of stress-strain in the region below the proportional limit on the stress-strain curve?
stress is directly proportional to strain up to the proportional limit. Their ratio is young's modulus.
How do you calibrate strain gauges?
The strain gage indicates strain, and the stress is from Hooke's law; stress = modulus times strain so you need to know the modulus of elasticity
Which comes first either stress or strain in an object?
When you have stress you also have strain - stress cannot exist without strain, so they come at the same time You can have strain without stress - like expanding something under temperature in a free state. If the state is not free, then you have stress occurring at the same time.
What is the relationship between bending and strain?
From the Hooke law, stress s is proportional to strain e; s = Ee where E is elastic modulus of the material; the stress is the bending stress which varies from plus on one surface to minus on the opposite surface.
Strain-stress diagram of copper and steel?
difference between Strain-stress diagram of copper and steel?
What is hysteresis loop in stress and strain?
the leading or lagging between the stress and strain is called hysteresis loop
Describe stress strain relationship for a loaded steel wire?
F = {YA(dl)}/L Stress = Restoring Force/Area Stress = {Y(dl)}/L (Strain) x (Y) = Stress Strain = (dL)/L Y : Young's Modulus A : Area dL or dl : Change in length
What is the ratio between stress and strain called?
Young's modulus
What is the difference between E and nu in engineering geology?
E is generally taken to be the elastic constant known as Young's modulus which describes the relationship between axial stress and axial strain where Hooke's law still applies (i.e. linear elasticity). Nu is Poisson's ratio which is the relationship between axial strain and radial or transverse strain. For more information, please see the related link.
What is the difference between the modulus of rigidity and modulus of elasticity?
We knew from Hook's law- "stress is proportional to strain." So, stress = k * strain [here, k is a constant] or, stress/strain= k Now, if the stress and strain occurs due to axial force then k is known as modulus of elasticity and it is denoted by E. if the stress and strain occurs due to shear force then k is known as modulus of rigidity and it is denoted by G.
Relationship between the shear stress and angle of shear?
Shear Stress divided by the Angle of Shear is equals to Shear Stress divided by Shear Strain which is also equals to a constant value known as the Shear Modulus. Shear Modulus is determined by the material of the object.
What is relastion between strees and strain?
In material science, strain does not depend on stress; rather it's the reverse. Stress is proportional to strain, as stated by Hooke's Law, until the material reaches its elastic limit.
Details about stress strain curve?
stress strain curve details
What is the difference between repetitive stress injury and repetitive strain injury?
there is no difference
Can stress exists without strain and vice versa. eg a heated bar held rigidly at both ends has no strain but there is stress?
Wherever there is stress there is strain. In the example you noted, if heated bar expands freely without one end constained it changes its strain without stress; that strain is called eigenstrain. If the same bar is held rigidly then the eigenstrain resisted and you get stress and strain. So stress cannot exist without strain; but strain can exist without stress if it is eigenstrain.
