Computational and Experimental Composites
Composite structures are widely used in various disciplines such as aerospace, civil engineering, marine, automotive, and sports due to excellent stiffness to weight ratio, manufacturability, and corrosion resistance. There are various research works ongoing in terms of both computational composites using finite-element analysis (FEA) methods as well as experimental composites such as self-healing composites.
Furthermore, the uncertainty quantification and reliability analysis of composite structures are also performed.
Furthermore, the uncertainty quantification and reliability analysis of composite structures are also performed.
Computational Composite
Computational methods in composites are mainly as applications for Uncertainty Quantification
Topics related to computational composites:
Topics related to computational composites:
- Multi-scale modeling of composites using empirical and finite-element methods.
- Cohesive Zone Modeling for Interlaminar fracture
- Progressive failure analysis for Intralaminar fracture
Uncertainty Quantification for Composites Structure
Although composites have become widely popular in recent years in aerospace, civil engineering, marine, sports, automotive, and so on, the structural responses of composites are random due to difficulty in quality control while manufacturing, fabrication, transportation, environmental and loading conditions, etc. Therefore, the effect of randomness should be quantified starting from the bottom scale to micro-scale to macro-scale.
Progressive Failure Analysis
To obtain better designs of composite structure, the failure mechanism of composites should be studied in detail. Failure in composites can be classified as intra-laminar and inter-laminar. The intra-laminar failure includes fiber and matrix failure with different modes whereas the inter-laminar includes the failure between the plies and is also known as delamination.
As shown below, when the randomness in material properties are considered, the load-displacement response of the composite plates is different as indicated by curves with different color. The failure progression with increment in displacement is shown on the two right figures which yield different peak responses and must quantified properly.
As shown below, when the randomness in material properties are considered, the load-displacement response of the composite plates is different as indicated by curves with different color. The failure progression with increment in displacement is shown on the two right figures which yield different peak responses and must quantified properly.
Experimental Composite
Experimental results as applied to interlaminar fracture of composites.
Topics related to experimental composites:
Topics related to experimental composites:
- Mode-I interlaminar fracture
- Digital Image Correlation
This experimental project is in collaboration with Dr. Samit Roy and funded by Air-Force Office for Scientific Research.