Global Stiffness Explained Global stiffness refers to the overall ability of a structure to resist deformation and maintain its shape , regardless of the...
Global stiffness refers to the overall ability of a structure to resist deformation and maintain its shape, regardless of the direction of the applied load. In simpler terms, it tells us how the structure will recover its original shape after it is deformed.
Global stiffness is often determined by considering the structure's stiffness matrix. The stiffness matrix is a mathematical representation of the structure's stiffness and is used to calculate how the structure will deform under a given load.
Key points about global stiffness:
It is a scalar quantity, meaning it has only one value for the entire structure.
It is a function of the geometry and the material properties of the structure.
It is typically calculated based on the stiffness matrix of the structure.
It is used to predict the overall deformation of the structure, including its shape, size, and position of points on the structure.
It is an important concept in structural analysis and is used to design structures that can withstand applied loads without failing.
Examples:
A rigid bar has a high global stiffness because it can only deform in one direction.
A deformable beam has a lower global stiffness because it can deform in multiple directions.
A truss structure has a high global stiffness because it is made up of multiple rigid elements that are connected to each other