Quantitative validation of carbon-fiber laminate low velocity impact simulations
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Simulations of low velocity impact with a flat cylindrical indenter upon a carbon fiber fabric reinforced polymer laminate are rigorously validated. Comparison of the impact energy absorption between the model and experiment is used as the validation metric. Additionally, non-destructive evaluation, including ultrasonic scans and three-dimensional computed tomography, provide qualitative validation of the models. The simulations include delamination, matrix cracks and fiber breaks. An orthotropic damage and failure constitutive model, capable of predicting progressive damage and failure, is developed in conjunction and described. An ensemble of simulations incorporating model parameter uncertainties is used to predict a response distribution which is then compared to experimental output using appropriate statistical methods. Lastly, the model form errors are exposed and corrected for use in an additional blind validation analysis. The result is a quantifiable confidence in material characterization and model physics when simulating low velocity impact in structures of interest.
- Research Organization:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1236477
- Alternate ID(s):
- OSTI ID: 1396754
- Report Number(s):
- SAND-2015-3964J; SAND-2015-3367J; PII: S0263822315008764
- Journal Information:
- Composite Structures, Vol. 135, Issue C; ISSN 0263-8223
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Progressive damage modeling and optimization of fibrous composites under ballistic impact loading
|
journal | August 2019 |
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