3D FE Modeling of Hybrid-Fiber ECC Panels Subjected to Projectile Impact

Title: 3D FE Modeling of Hybrid-Fiber ECC Panels Subjected to Projectile Impact
Author(s): Siew C. Lee, Ser T. Quek, Mohamed Maalej
Paper category : conference
Book title: International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites in Structural Applications
Editor(s): G. Fischer and V. C. Li
Print-ISBN: 2-912143-93-4
e-ISBN: 2912143942
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 489 - 497
Total Pages: 9
Nb references: 10
Language: English

Abstract: In recent studies, ECCs were shown to demonstrate a good potential in giving better functionality compared to concrete under projectile impact. This indicates the need for extensive studies on the impact resistance of ECC targets. However, physical experiments on ECC to evaluate its performance in terms of penetration depth and crater diameter due to impact are still limited and costly.
In this paper, 3D FE modeling of hybrid-fiber ECC panels (representing part of a door or wall) subjected to small size hard projectile impact is presented. The panels of size 300 mm x 170 mm and of two different thicknesses (55 and 75 mm) were subjected to impacts by ogive-nose shape projectiles fired at 300-650 m/s. The objective of the FE model was to predict the penetration depth and crater diameter of the panels under such impacts. In the FE model, MAT 72, a concrete material model in LS-DYNA which allows strain-hardening is used to model the ECC material. Unavailable in previous releases, the latest version (beta v971) of MAT 72 now allows different Dynamic Increase Factor (DIF)-strain-rate enhancements for compression and tension to be specified. By comparing results from the FE analysis and those obtained recently from laboratory impact tests, a reasonable agreement has been observed between the two.

Online publication: 2005-05-15
Classification: Special Considerations
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143942.053