Abstract
A three-dimensional constitutive model has been developed for modeling orthotropic composites subject to impact loads. It has three distinct components—a deformation model involving elastic and plastic deformations; a damage model; and a failure model. The model is driven by tabular data that is generated either using laboratory tests or via virtual testing. A unidirectional composite—T800/F3900, commonly used in the aerospace industry, is used in the verification and validation tests. While the failure model is under development, these tests indicate that the implementation of the deformation and damage models in a commercial finite element program, LS-DYNA, is efficient, robust and accurate.
Highlights
Modeling and simulation of composites during an impact event is a huge challenge given the wide variety of composites and the associated complexity in characterization of the behavior of the constituent materials as well as the interaction between them
A new material model and computational framework have been developed for modeling orthotropic composites subject to impact loads
The algorithm has been implemented in a special version of LS-DYNA as MAT213 material model
Summary
Modeling and simulation of composites during an impact event is a huge challenge given the wide variety of composites and the associated complexity in characterization of the behavior of the constituent materials as well as the interaction between them. A major reason for these challenges is the lack of mature material models that should be able to predict, with some degree of certainty, the deformation, damage and failure of composite systems. Material models are driven entirely by a few sets of material properties properties capturing many orthotropic deformation and damage behavior. The from present approach, the composite impact model is divided into a deformation model, a. In the present the composite is divided into deformation damage model and approach, a failure model (Figure 1).impact. Such a model partitioning allows for athe elastic and model, plastic adeformations damage model and a failureby model (Figure 1). A commonly used unidirectional laminate, T800/F3900 graphite/epoxy composite, is used in the numerical studies
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
