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Chapter 20

Bending

Изгиб
Изгиб
Pure bending occurs when a prismatic member possesses a plane of symmetry and experiences couples of equal magnitudes acting within that plane. This type ...
Симметричный элемент при изгибе
Симметричный элемент при изгибе
Consider a prismatic member subjected to two couples, equal in magnitude but in opposite directions, acting within the symmetric plane of the member. A ...
Деформации симметричного элемента при изгибе
Деформации симметричного элемента при изгибе
Consider the deformations of a symmetric prismatic member subjected to equal and opposite couples. As the member bends uniformly, the lines on the wider ...
Напряжение при изгибе
Напряжение при изгибе
Consider a bending moment where a symmetric member endures stress within the elastic limit. The longitudinal stress can be expressed using Hooke's ...
Деформация в поперечном сечении
Деформация в поперечном сечении
When a material is subjected to uniaxial stress, the material undergoes elongation or contraction in the direction of the applied stress. At the same ...
Изгиб материала: решение задач
Изгиб материала: решение задач
Consider two metallic pipes having an inner radii of 1.5 cm and 1 cm, respectively, and an outer radii of 1.8 cm. If both pipes can withstand a maximum ...
Изгиб элементов, изготовленных из нескольких материалов
Изгиб элементов, изготовленных из нескольких материалов
Consider a member of two different materials that have the same cross-sectional area. The equation of stress for such a member is expressed in terms of ...
Концентрация напряжений
Концентрация напряжений
The equation for stress for a member under pure bending having a plane of symmetry and a uniform cross-section assumes that the stress is evenly ...
Пластические деформации
Пластические деформации
For pure bending, when maximum stress exceeds the yield strength of the member's material, it undergoes plastic deformation. The strain at any point ...
Конструкции из упругопластического материала
Конструкции из упругопластического материала
Consider a member made up of an elastoplastic material with a rectangular cross-section. Within the elastic limit, the stress distribution across the ...
Пластические деформации элементов с одной плоскостью симметрии
Пластические деформации элементов с одной плоскостью симметрии
Consider a member experiencing plastic deformation due to bending and having one plane of symmetry. The stresses are uniformly distributed above and below ...
Остаточные напряжения при изгибе
Остаточные напряжения при изгибе
If a sufficiently large bending moment is applied to an elastoplastic member, plastic zones will develop in the member. Now, if the bending moment is ...
Эксцентрическая осевая нагрузка в плоскости симметрии
Эксцентрическая осевая нагрузка в плоскости симметрии
Eccentric axial loading refers to the application of an axial load that is not aligned with the centroidal axis of the member. Consider a member having a ...
Несимметричный изгиб
Несимметричный изгиб
Unsymmetric bending occurs when the bending moment is not acting along the plane of the symmetry of the member or if the member does not possess any plane ...
Несимметричный изгиб: угол нейтральной оси
Несимметричный изгиб: угол нейтральной оси
Consider a member with a vertical plane of symmetry subjected to bending couples in a plane at an angle θ with respect to the vertical axis of the ...
Общий случай эксцентричной осевой нагрузки
Общий случай эксцентричной осевой нагрузки
Consider a member subjected to equal and opposite eccentric forces. These forces are applied at a horizontal distance of a and a vertical distance of b ...
Изгиб криволинейных элементов: анализ деформации
Изгиб криволинейных элементов: анализ деформации
Consider a curved member having a transverse section symmetric with the y-axis. Its upper and lower surfaces intersect with xy-planes along arcs of ...
Гибка изогнутых элементов: нейтральная поверхность
Гибка изогнутых элементов: нейтральная поверхность
For a curved member with a uniform cross-section, the strain equation along the section shows that it varies non-linearly with the distance from the ...
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