Composite Material Models in LS-DYNA and Damage Development: An Evaluation Based on the OCT Geometry

2020 ◽  
pp. 525-533
Author(s):  
A. Floyd ◽  
R. Vaziri ◽  
A. Poursartip
Keyword(s):  
Composite Material ◽  
Damage Development ◽  
Material Models

Challenges Towards Developing a High Fidelity Database for Validating High Strain Rate Composite Material Models

2021 ◽  
Author(s):  
Mark Pankow ◽  
Joseph Giliberto ◽  
Brandon Hearley ◽  
Brian Justusson ◽  
Joseph Schaefer ◽  
...  
Keyword(s):  
Composite Material ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
High Fidelity ◽  
Material Models

Damage development in a noncrimp-glass fabric reinforced epoxy composite material

2009 ◽  
Vol 30 (12) ◽  
pp. 1800-1808 ◽  
Author(s):  
G. Cruz-Santos ◽  
J. Rodríguez-Laviada ◽  
C.R. Rios-Soberanis
Keyword(s):  
Composite Material ◽  
Epoxy Composite ◽  
Glass Fabric ◽  
Damage Development

The Fatigue Performance of Notched Composite Material Systems

1990 ◽  
Vol 204 (1) ◽  
pp. 57-69 ◽  
Author(s):  
S Kellas ◽  
J Morton ◽  
P T Curtis
Keyword(s):  
Composite Material ◽  
Fatigue Damage ◽  
Residual Strength ◽  
Characteristic Parameter ◽  
Fatigue Performance ◽  
Material System ◽  
Epoxy System ◽  
Damage Development ◽  
Material Systems

In this work results are reported from an experimental fatigue programme. The role of the constituent materials upon the fatigue performance of a given composite material system was studied. This involved comparisons of the residual strength, damage development, and in some cases fatigue life. A new method of approach, based upon a unique characteristic fatigue parameter, termed the damage transition stress, St, was also introduced. It has been shown that the employment of the characteristic parameter can simplify the comparison of different material systems considerably. Four graphite reinforced material systems were evaluated: (a) standard epoxy system, (b) toughened epoxy system, (c) thermoplastic system and, (d) high temperature system. It was found that three of the four material systems examined (a, b, and d) were more sensitive to hygrothermal environments, so far as the development of fatigue damage is concerned. In general, the tensile residual strength, in all material systems, showed a marked improvement, whereas the effect of environment and fatigue damage combination upon the compressive strength was more complex. Presentation of the fatigue data in the form of linear S-N plots allowed the determination of St, and its dependence upon environment and material systems. A material dynamic toughness was also identified.

scholarly journals Unknown Qualities

2013 ◽  
Vol 135 (08) ◽  
pp. 44-49
Author(s):  
Jean Thilmany
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Rocket Engine ◽  
Weight Ratio ◽  
Software System ◽  
Material Models ◽  
Software Packages

This article reviews various tools that are evolving to help engineers work with complex composite materials. Specialized composite analysts are needed to help find the best material for a particular use and to determine if it can be manufactured with the chosen material and in a particular shape. The Falcon Heavy spaceflight system is planned to launch on a SpaceX-designed rocket engine. As composite materials are lighter than metal, SpaceX engineers realized that composites could improve the strength-to-weight ratio of its materials. In order to help engineers choose the best composite for the design, the software system contains a large library of material models that designers can use to explore a composite material and determine how it might behave under a variety of circumstances. Predicting how the cracks will affect the part long-term still cannot be done within software packages and must be prototyped.

Sign in / Sign up

Export Citation Format

Share Document