Constitutive modelling of UHPCC material under impact and blast loadings. (July 2021)
- Record Type:
- Journal Article
- Title:
- Constitutive modelling of UHPCC material under impact and blast loadings. (July 2021)
- Main Title:
- Constitutive modelling of UHPCC material under impact and blast loadings
- Authors:
- Yang, Shangbin
Kong, Xiangzhen
Wu, Hao
Fang, Qin
Xiang, Hengbo - Abstract:
- Highlights: A new dynamic tensile damage model for UHPCC material with consideration of fiber bridging mechanism is proposed and incorporated into the Kong-Fang material model. All the parameters needed in the modified Kong-Fang material model are carefully calibrated. The modified Kong-Fang material model can well predict the dynamic response and failure in UHPCC structures subjected to intensively dynamic loadings. Existing material models originally developed for traditional concrete, without carefully parameter calibration or model modification, should be cautiously used for UHPCC material. Abstract: Ultra-high performance cement based composite (UHPCC) is a prospective material for protective structures subjected to intensive loadings such as impact and blast due to its prominent dynamic mechanical properties. With the aid of an accurate material model, numerical simulation plays an increasingly important role in prediction of dynamic responses of UHPCC structures. It is known that existing concrete material models are developed for traditional concrete and cannot be applied to UHPCC material directly. In the present study, a new constitutive model of UHPCC material under impact and blast loadings is developed, which involves proposing a new tensile damage model for UHPCC which is then incorporated into the Kong-Fang material model recently developed (Int J Impact Eng 2018, 120: 60-78), and calibrating parameters of this modified material model based on existing testHighlights: A new dynamic tensile damage model for UHPCC material with consideration of fiber bridging mechanism is proposed and incorporated into the Kong-Fang material model. All the parameters needed in the modified Kong-Fang material model are carefully calibrated. The modified Kong-Fang material model can well predict the dynamic response and failure in UHPCC structures subjected to intensively dynamic loadings. Existing material models originally developed for traditional concrete, without carefully parameter calibration or model modification, should be cautiously used for UHPCC material. Abstract: Ultra-high performance cement based composite (UHPCC) is a prospective material for protective structures subjected to intensive loadings such as impact and blast due to its prominent dynamic mechanical properties. With the aid of an accurate material model, numerical simulation plays an increasingly important role in prediction of dynamic responses of UHPCC structures. It is known that existing concrete material models are developed for traditional concrete and cannot be applied to UHPCC material directly. In the present study, a new constitutive model of UHPCC material under impact and blast loadings is developed, which involves proposing a new tensile damage model for UHPCC which is then incorporated into the Kong-Fang material model recently developed (Int J Impact Eng 2018, 120: 60-78), and calibrating parameters of this modified material model based on existing test data. The modified material model for UHPCC is implemented into the finite element code LS-DYNA through user defined material model. Single element tests including unconfined uniaxial compression and tension and triaxial compression are firstly conducted to demonstrate the improved performances of the modified material model for UHPCC material. Then three selected experiments on UHPCC structures subjected to impact and blast loadings are numerically simulated and compared with corresponding experimental data. Numerical predictions by the modified material model are well consistent with experimental data in terms of impact force, deflection and failure. … (more)
- Is Part Of:
- International journal of impact engineering. Volume 153(2021)
- Journal:
- International journal of impact engineering
- Issue:
- Volume 153(2021)
- Issue Display:
- Volume 153, Issue 2021 (2021)
- Year:
- 2021
- Volume:
- 153
- Issue:
- 2021
- Issue Sort Value:
- 2021-0153-2021-0000
- Page Start:
- Page End:
- Publication Date:
- 2021-07
- Subjects:
- UHPCC -- Constitutive model -- Tensile damage -- Parameter calibration -- Impact and blast loadings
Impact -- Periodicals
Shock (Mechanics) -- Periodicals
Impact -- Périodiques
Choc (Mécanique) -- Périodiques
Impact
Shock (Mechanics)
Periodicals
620.1125 - Journal URLs:
- http://www.sciencedirect.com/science/journal/0734743X ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.ijimpeng.2021.103860 ↗
- Languages:
- English
- ISSNs:
- 0734-743X
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 4542.302500
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 22340.xml