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  2. Stress–strain curve - Wikipedia

    en.wikipedia.org/wiki/Stressstrain_curve

    In engineering and materials science, a stressstrain curve for a material gives the relationship between stress and strain. It is obtained by gradually applying load to a test coupon and measuring the deformation, from which the stress and strain can be determined (see tensile testing). These curves reveal many of the properties of a ...

  3. 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 ...

  4. Stress (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Stress_(mechanics)

    In continuum mechanics, stress is a physical quantity that describes forces present during deformation. For example, an object being pulled apart, such as a stretched elastic band, is subject to tensile stress and may undergo elongation. An object being pushed together, such as a crumpled sponge, is subject to compressive stress and may undergo ...

  5. Strain (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Strain_(mechanics)

    The (infinitesimal) strain tensor (symbol ) is defined in the International System of Quantities (ISQ), more specifically in ISO 80000-4 (Mechanics), as a "tensor quantity representing the deformation of matter caused by stress. Strain tensor is symmetric and has three linear strain and three shear strain (Cartesian) components." [6]

  6. Ramberg–Osgood relationship - Wikipedia

    en.wikipedia.org/wiki/Ramberg–Osgood_relationship

    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 ...

  7. Psychological stress - Wikipedia

    en.wikipedia.org/wiki/Psychological_stress

    Psychological stress. In psychology, stress is a feeling of emotional strain and pressure. [1] Stress is a type of psychological pain. Small amounts of stress may be beneficial, as it can improve athletic performance, motivation and reaction to the environment. Excessive amounts of stress, however, can increase the risk of strokes, heart ...

  8. Work hardening - Wikipedia

    en.wikipedia.org/wiki/Work_hardening

    The strain can be decomposed into a recoverable elastic strain (ε e) and an inelastic strain (ε p). The stress at initial yield is σ 0 . Work hardening , also known as strain hardening , is the process by which a material's load-bearing capacity (strength) increases during plastic (permanent) deformation.

  9. Strength of materials - Wikipedia

    en.wikipedia.org/wiki/Strength_of_materials

    The modulus of elasticity can be used to determine the stressstrain relationship in the linear-elastic portion of the stressstrain curve. The linear-elastic region is either below the yield point, or if a yield point is not easily identified on the stressstrain plot it is defined to be between 0 and 0.2% strain, and is defined as the ...