Exact formulation of axisymmetric interface-element stiffness matrix. Technical note

1993 ◽  
Vol 30 (2) ◽  
pp. A107
Keyword(s):  
Stiffness Matrix ◽  
Technical Note ◽  
Interface Element ◽  
Exact Formulation ◽  
Element Stiffness Matrix

Incorporation of Spinal Flexibility Measurements Into Finite Element Analysis

1990 ◽  
Vol 112 (4) ◽  
pp. 481-483 ◽  
Author(s):  
Mack G. Gardner-Morse ◽  
Jeffrey P. Laible ◽  
Ian A. F. Stokes
Keyword(s):  
Experimental Data ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stiffness Matrix ◽  
Beam Element ◽  
Technical Note ◽  
Element Analysis ◽  
Spinal Motion ◽  
Spinal Flexibility

This technical note demonstrates two methods of incorporating the experimental stiffness of spinal motion segments into a finite element analysis of the spine. The first method is to incorporate the experimental data directly as a stiffness matrix. The second method approximates the experimental data as a beam element.

Curved beam element stiffness matrix formulation

1985 ◽  
Vol 21 (4) ◽  
pp. 663-669 ◽  
Author(s):  
R. Palaninathan ◽  
P.S. Chandrasekharan
Keyword(s):  
Stiffness Matrix ◽  
Beam Element ◽  
Curved Beam ◽  
Matrix Formulation ◽  
Element Stiffness Matrix ◽  
Curved Beam Element

scholarly journals Research on Advanced Analysis Method of Semi-Rigid Steel Frames

2015 ◽  
Vol 9 (1) ◽  
pp. 12-16
Author(s):  
Liu Wei ◽  
Shu Ganping ◽  
Chan Siulai
Keyword(s):  
Stiffness Matrix ◽  
Mechanical Performance ◽  
Plastic Hinge ◽  
Geometrical Nonlinearity ◽  
Steel Frames ◽  
Test Results ◽  
Analysis Method ◽  
Validity And Reliability ◽  
Element Stiffness Matrix ◽  
Advanced Analysis

The advanced analysis method used to analyze semi-rigid steel frames is introduced, and the method could take account of many factors influencing structure mechanical performance. These factors include: initial imperfect mode of structure and members, geometrical nonlinearity (P-∆, P-δ effects), material nonlinearity and semi-rigid connections. The Curved Stability Function (CSF) element is built to take account of initial imperfect state, semi-rigid connections and plastic hinge, and derivatives of the second-order element stiffness matrix to extend the spatial element stiffness matrix. The nonlinearity behavior of semi-rigid connections and plastic hinge are simulated by the spring element. Judgment criteria of plastic hinge and spring stiffness values are determined, as well as of the structure failure. The three semirigid steel frames are directly analyzed by the program named NIDA, and the results of NIDA are comparatively analyzed with test results. It is indicated that the results of NIDA are better compared to the test results, verifying validity and reliability of the advanced analysis method used to analyze semi-rigid steel frames.

Sign in / Sign up

Export Citation Format

Share Document