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  2. Stress–strain curve - Wikipedia

    en.wikipedia.org/wiki/Stressstrain_curve

    The stress and strain can be normal, shear, or a mixture, and can also be uniaxial, biaxial, or multiaxial, and can even change with time. The form of deformation can be compression, stretching, torsion, rotation, and so on. If not mentioned otherwise, stressstrain curve typically refers to the relationship between axial normal stress and ...

  3. Deformation (engineering) - Wikipedia

    en.wikipedia.org/wiki/Deformation_(engineering)

    This is not true since the actual area will decrease while deforming due to elastic and plastic deformation. The curve based on the original cross-section and gauge length is called the engineering stressstrain curve, while the curve based on the instantaneous cross-section area and length is called the true stressstrain curve. Unless ...

  4. Ramberg–Osgood relationship - Wikipedia

    en.wikipedia.org/wiki/Ramberg–Osgood_relationship

    The Ramberg–Osgood equation was created to describe the nonlinear relationship between stress and strain—that is, the stressstrain curve—in materials near their yield points. It is especially applicable to metals that harden with plastic deformation (see work hardening), showing a smooth elastic-plastic transition.

  5. Compressive strength - Wikipedia

    en.wikipedia.org/wiki/Compressive_strength

    As the load increases, the machine records the corresponding deformation, plotting a stress-strain curve that would look similar to the following: True stress-strain curve for a typical specimen. The compressive strength of the material corresponds to the stress at the red point shown on the curve.

  6. Forming limit diagram - Wikipedia

    en.wikipedia.org/wiki/Forming_limit_diagram

    Thus the basic influence parameters for the forming limits are, the strain hardening exponent, n, the initial sheet thickness, t 0 and the strain rate hardening coefficient, m. The lankford coefficient, r, which defines the plastic anisotropy of the material, has two effects on the forming limit curve. On the left side there is no influence ...

  7. Necking (engineering) - Wikipedia

    en.wikipedia.org/wiki/Necking_(engineering)

    The Considère construction for prediction of the onset of necking, expressed as the gradient of the (true) stress-strain curve falling to the true stress, for a material conforming to the Ludwik-Hollomon relationship, with the parameter values shown. The condition can also be expressed in terms of the nominal strain:

  8. Toughness - Wikipedia

    en.wikipedia.org/wiki/Toughness

    Toughness as defined by the area under the stressstrain curve for one unit volume of the material. In materials science and metallurgy, toughness is the ability of a material to absorb energy and plastically deform without fracturing. [1] Toughness is the strength with which the material opposes rupture.

  9. Stress–strain analysis - Wikipedia

    en.wikipedia.org/wiki/Stressstrain_analysis

    Stressstrain analysis (or stress analysis) is an engineering discipline that uses many methods to determine the stresses and strains in materials and structures subjected to forces. In continuum mechanics , stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other ...