Tangent stiffness matrix
This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)(Learn how and when to remove this template message)
In computational mechanics, a tangent stiffness matrix is a matrix that describes the stiffness of a system in response to small changes in configuration. It represents tangent in that the energy of the system can be thought of as a high-dimensional surface with the local slope of a plane tangent to it at the given point defined by the tangent stiffness matrix.
The tangent stiffness matrix appears when solving certain problems. For example, the tangent stiffness matrix is the generalization of slope that can be used with Newton's method.