Lamination Theory for the Strength of Fiber Composite Materials

2017 ◽  
Vol 84 (7) ◽  
Author(s):  
Richard M. Christensen
Keyword(s):  
Composite Materials ◽  
Failure Criterion ◽  
Composite Laminates ◽  
Fiber Composite ◽  
Relative Volume ◽  
Complete Failure ◽  
Lamination Theory ◽  
Laminated Materials ◽  
Fiber Composite Materials ◽  
Special Case

Building upon the previous work for the failure of quasi-isotropic fiber composite laminates, the much more difficult and more important general case of orthotropic laminates is now taken up. The full and complete failure criterion is derived for fiber dominated, general 0, 90, ±45-deg laminated materials, with the relative volume fractions to be specified for each direction. Quasi-isotropy is a special case of the orthotropic formalism, and the general orthotropic results are just as rigorous as the previous specialized quasi-isotropic results. The orthotropic failure criterion results are of direct and immediate relevance in composite materials applications.

A Unique and Rational Applications Methodology for Fiber Composite Laminates

2017 ◽  
Vol 84 (10) ◽  
Author(s):  
Richard M. Christensen
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Composite Laminates ◽  
Fiber Composite ◽  
Matrix Composites ◽  
Specific Design ◽  
Failure Theory ◽  
Lamination Theory ◽  
Polymeric Matrix Composites ◽  
Fiber Composite Materials

An applications methodology is synthesized from the research-based development of failure theory for orthotropic fiber composite laminates. In effect, this work continues and completes the work of Christensen (2017, “Lamination Theory for the Strength of Fiber Composite Materials,” ASME J. Appl. Mech., 84(7), p. 071007). This failure theory applies for the condition of fiber-dominated behavior, appropriate to carbon fiber—polymeric matrix composites and such similar systems. A lamination theory for stiffness and a separate lamination theory for strength are the outcomes derived here. Final forms are given for 0, 90, ± 45 type orthotropic laminates, with the four lamina orientation volume fractions to be specified in any particular application of interest. Many examples are given of using the new methodology in specific design cases.

The Kink Band Mechanism for the Compressive Failure of Fiber Composite Materials

1997 ◽  
Vol 64 (1) ◽  
pp. 1-6 ◽  
Author(s):  
R. M. Christensen ◽  
S. J. DeTeresa
Keyword(s):  
Composite Materials ◽  
Failure Criterion ◽  
Fiber Composite ◽  
Kink Band ◽  
Compressive Failure ◽  
Kink Bands ◽  
Physical Variables ◽  
Fiber Misalignment ◽  
Fiber Composite Materials ◽  
The Ideal

A simple strain-based yield/failure criterion for fiber composite materials is incorporated into a kink band analysis of compressive failure. Under realistic conditions of fiber misalignment the analysis predicts compressive failure at load levels about one–fifth of the ideal value, and with kink band inclinations of about 20 deg. Some parametric variations of the relevant physical variables are given in simple graphical forms, and comparisons are made with newly obtained micrographs of kink bands.

Wood-Glass Fiber Composite Materials in Structural Elements of Tram Tracks

2019 ◽  
Vol 777 (12) ◽  
pp. 73-77
Author(s):  
B.A. BONDAREV ◽  
◽  
T.N. STORODUBTSEVA ◽  
D.A. KOPALIN ◽  
S.V. KOSTIN ◽  
...  
Keyword(s):  
Composite Materials ◽  
Glass Fiber ◽  
Fiber Composite ◽  
Structural Elements ◽  
Glass Fiber Composite ◽  
Fiber Composite Materials
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