The principle of Saint-Venant postulates that the stress distribution within a structural member does not rely on the precise method of load application except in the vicinity of the load application points. Consider a scenario where loads are centrally applied on two plates. In this case, the plates move toward each other without any rotation. This movement causes the member to contract in length and expand in width and thickness. Uniform deformation across all elements and maintaining straight members and plane sections facilitate a consistent distribution of strains and stresses.
However, when loads are concentrated, the elements close to the application points endure large stresses, while those positioned further away stay largely unaffected. Yet, deformations tend to equalize in the case of elements distant from the ends, leading to a more even distribution of strain and stress. Interestingly, beyond a distance equivalent to the member's width, the stress distribution becomes detached from the mode of load application, a key aspect of Saint-Venant's principle. While applying this principle, it is important to remember that the actual loading and the loading used to calculate the stresses must be statically equivalent. Furthermore, this principle does not apply to computing stresses near the load application points.
来自章节 18:
Now Playing
Stress and Strain - Axial Loading
433 Views
Stress and Strain - Axial Loading
383 Views
Stress and Strain - Axial Loading
478 Views
Stress and Strain - Axial Loading
469 Views
Stress and Strain - Axial Loading
710 Views
Stress and Strain - Axial Loading
233 Views
Stress and Strain - Axial Loading
296 Views
Stress and Strain - Axial Loading
160 Views
Stress and Strain - Axial Loading
151 Views
Stress and Strain - Axial Loading
110 Views
Stress and Strain - Axial Loading
311 Views
Stress and Strain - Axial Loading
300 Views
Stress and Strain - Axial Loading
111 Views
Stress and Strain - Axial Loading
290 Views
Stress and Strain - Axial Loading
649 Views
See More
版权所属 © 2025 MyJoVE 公司版权所有,本公司不涉及任何医疗业务和医疗服务。