Discussion: “A Distortion Energy Failure Theory for Orthotropic Materials” (Forman, G. W., 1972, ASME J. Eng. Ind., 94, pp. 1073–1076)

1972 ◽  
Vol 94 (4) ◽  
pp. 1077-1077
Author(s):  
T. A. Cruse
Keyword(s):  
Orthotropic Materials ◽  
Failure Theory ◽  
Distortion Energy ◽  
Energy Failure

scholarly journals A Distortion Energy Failure Theory for Orthotropic Materials

1972 ◽  
Vol 94 (4) ◽  
pp. 1073-1076 ◽  
Author(s):  
G. W. Forman
Keyword(s):  
Experimental Studies ◽  
Three Dimensional ◽  
Algebraic Method ◽  
Orthotropic Materials ◽  
Rational Basis ◽  
State Of Stress ◽  
Failure Theory ◽  
Distortion Energy ◽  
Energy Theory ◽  
Energy Failure

Of the numerous methods developed to predict failure of isotropic materials exposed to a three-dimensional state of stress, experimental studies tend to confirm the validity of the distortional energy theory. To date no rational basis of predicting inelastic action in an orthotropic material exposed to principle stresses coincident with the material axes has been proposed. This study assumes that distortion energy may be used to predict failure of orthotropic materials, and a usable algebraic method of predicting failure is developed.

A Fracture Theory for Brittle Anisotropic Materials

1974 ◽  
Vol 96 (2) ◽  
pp. 91-96 ◽  
Author(s):  
T. G. Priddy
Keyword(s):  
Orthotropic Materials ◽  
Necessary Condition ◽  
Material Strength ◽  
Interaction Coefficients ◽  
Cubic Equation ◽  
Simple Cubic ◽  
Failure Theory ◽  
Tension And Compression ◽  
Fracture Theory ◽  
Macroscopic Failure

This paper outlines the development of a general macroscopic failure theory. The result is a relatively simple cubic equation where interaction coefficients for tension-tension and compression-compression strengths may be defined separately. Approximations for biaxial and triaxial normal stress interactions are included to reduce the number of experimental data to nine for brittle three-dimensionally orthotropic materials and to two for brittle isotropic materials. A necessary condition that the theory closely describe brittle isotropic material strength is satisfied for a comprehensive set of cast iron biaxial strength data. The surface is graphically illustrated for various materials.

Multiaxial fatigue analysis of orthotropic materials

2010 ◽  
Vol 107 (9) ◽  
pp. 369-375 ◽  
Author(s):  
C. Gaier ◽  
B. Unger ◽  
H. Dannbauer
Keyword(s):  
Fatigue Analysis ◽  
Multiaxial Fatigue ◽  
Orthotropic Materials
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