Plastic Strain Concentrations in Perforated Structures Subjected to Alternating Loads

1982 ◽  
Vol 104 (3) ◽  
pp. 161-167 ◽  
Author(s):  
R. D. Kichko ◽  
M. Badlani ◽  
F. Spaniel ◽  
W. J. O’Donnell ◽  
J. S. Porowski
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Plastic Strain ◽  
Shear Loading ◽  
Monotonic Loading ◽  
The Finite Element Method ◽  
Perforated Plates ◽  
Strain Concentration ◽  
Elastic Plastic ◽  
Concentration Factors

Perforated plates with a uniform triangular penetration pattern subjected to alternating loads are analyzed. The cases of equibiaxial and shear loading are considered and the finite element method is used to obtain elastic-plastic solutions for various ligament efficiencies. The plastic strain concentrations for alternating loads are compared to those for monotonic loading. Useful methods of obtaining plastic strain concentration factors for alternating loads using the results for monotonic loading are given.

Beams in Receding/Advancing Contact: Dundurs Problems

1985 ◽  
Vol 52 (4) ◽  
pp. 933-936 ◽  
Author(s):  
T. P. Pawlak ◽  
N. J. Salamon ◽  
F. F. Mahmoud
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Monotonic Loading ◽  
Incremental Algorithm ◽  
The Finite Element Method ◽  
Element Method

The response of beams constrained unilaterally by a foundation and upper barriers while under monotonic loading is treated. Several scenarios featuring gaps and clearances are solved and shown to agree with Dundurs’ predictions. The solutions are generated by a numerical simulation featuring a direct incremental algorithm in conjunction with the finite element method.

Study of Elastic–Plastic Fracture Problem Using Finite Element Technique

1984 ◽  
Vol 106 (4) ◽  
pp. 476-482
Author(s):  
F. T. C. Loo
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stiffness Matrix ◽  
Graphical Form ◽  
The Finite Element Method ◽  
Finite Element Technique ◽  
Elastic Plastic ◽  
Center Crack ◽  
Initial Stress Method ◽  
Element Technique

Numerical methods for the analysis of the elastic-plastic fracture problem using a special finite element technique are presented. A brief description of some concepts in elastic-plastic fracture mechanics and of the finite element method is followed by the formulation procedure of the stiffness matrix using eight-noded quadrilateral isoparametric elements. After a terse discussion of the initial stress method, the procedure of computation is extended in the analysis by using an incremental load process. The size and the shape of the plastic zone of a center crack specimen is investigated. Results are presented in graphical form.

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