Dynamic material properties for numerical modelling of impact behavior of light-alloy structures

2019 ◽  
Author(s):  
Nuno Peixinho ◽  
Bruno Azevedo
Keyword(s):  
Numerical Modelling ◽  
Material Properties ◽  
Impact Behavior ◽  
Light Alloy ◽  
Dynamic Material Properties

SIMULATION OF DYNAMIC EVENT OF IMPACT USING EXPLICIT 3D FEM MODEL AND VALIDATION BY EXPERIMENT AND CONTACT MODELS

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Akshay Mallikarjuna ◽  
Dan Marghitu ◽  
P.K. Raju
Keyword(s):  
Material Properties ◽  
Permanent Deformation ◽  
Oblique Impact ◽  
Coefficient Of Restitution ◽  
Impact Behavior ◽  
3D Fem ◽  
Dynamic Event ◽  
Contact Models ◽  
Explicit Dynamic ◽  
The Impact

— In this study, an optimized method to simulate the dynamic 3D event of the impact of a rod with a flat surface has been presented. Unlike the 2D FEM based contact models, in this study both the bodies undergoing the impact are considered elastic(deformable) and simulation is the dynamic event of the impact, instead of predefined 2D symmetric contact analysis. Prominent contact models and plasticity models to define material properties in ANSYS are reviewed. Experimentation results of normal and oblique impact of the rod for different rods provided the coefficient of restitution. Experimental results of permanent deformation on the base for different impact velocity is derived out of a prominent impact study. The simulation results are in co-relation with experiment and both indentation and flattening models on the coefficient of restitution (COR) and permanent deformation of the base and rod after the impact. Thus, the presented 3D Explicit Dynamic simulation of impact is validated to analyze the impact behavior of the 2 bodies without any predefined assumptions with respect to boundary conditions or material properties.

scholarly journals The multiaxial behavior of filled polypropylene parts by drop-weight impact test

2018 ◽  
Vol 210 ◽  
pp. 05013 ◽  
Author(s):  
Ales Mizera ◽  
Martin Mizera ◽  
Milan Navratil ◽  
Stepan Sanda ◽  
Michal Opocensky
Keyword(s):  
Polymeric Material ◽  
Glass Fibre ◽  
Impact Loading ◽  
Material Properties ◽  
Impact Test ◽  
Impact Behavior ◽  
Suitable Choice ◽  
Penetration Test ◽  
Weight Impact ◽  
The Impact

This study deals with the multiaxial behaviour of reinforced polypropylene with 30 % of glass fibre (PP30GF) and virgin polypropylene (PP). The impact behavior of these two materials is very needed to know for the possible modification of these two materials to obtain the better material properties. The injection moulded PP, and PP30GF samples were subjected to the penetration test at different set potential energies, and the results were subsequently evaluated and discussed. It was found out that PP has better behaviour at the multiaxial stress than PP30GF. It is possible to claim that for the application more demanding to the impact loading, pure PP is more suitable choice of the polymeric material.

scholarly journals Characterizations of dynamic material properties on compact pulsed power generator CQ-4

2018 ◽  
Vol 183 ◽  
pp. 02057
Author(s):  
Guiji Wang ◽  
Binqiang Luo ◽  
Xuping Zhang ◽  
Jintao Cai ◽  
Tao Chong ◽  
...  
Keyword(s):  
Material Properties ◽  
Hot Spot ◽  
Short Circuit ◽  
Pulsed Power ◽  
Isentropic Compression ◽  
Power Generator ◽  
High Pressure High Temperature ◽  
Dynamic Material Properties ◽  
Pulsed Power Generator ◽  
Compact Pulsed Power

Over last two decades, the techniques of magnetically driven quasi-isentropic compression and launching high velocity flyer plates based on pulsed high current generators have being extensively used to do dynamic material experiments under extreme conditions, such as high pressure, high temperature and high strain rate. A compact pulsed power generator CQ-4 was developed to do quasi-isentropic compression experiments of materials at Institute of Fluid Physics of CAEP, which can deliver maximum peak current of about 4 MA to short-circuit loads and produce approximate 100 GPa pressure on the metallic samples. On CQ-4, several types of dynamic material experiments have being conducted for equation of states, phase transitions, constitutive relationships, micro-structure evolutions of matter under quasi-isentropic compression and shock loadings. Meanwhile the dynamic behaviors of solid plastic bonded explosives and their components have also being researched for better understanding the interaction of explosive components under stress waves and the hot spot originations and evolutions mechanism of PBX explosives under dynamic loadings. Several typical applications in dynamic material properties were shown in this paper to exhibit the capabilities of CQ-4.

Study on the Mechanical Properties of High Performance Hybrid Fiber Reinforced Cementitious Composite (HFRCC) under Impact Loading

2014 ◽  
Vol 629-630 ◽  
pp. 79-84 ◽  
Author(s):  
Hui Xian Yang ◽  
Jing Li ◽  
Yan Sheng Huang
Keyword(s):  
Impact Loading ◽  
Material Properties ◽  
High Performance ◽  
Steel Fibers ◽  
Cementitious Composites ◽  
Peak Strain ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Dynamic Material Properties ◽  
Fiber Reinforced Cementitious Composites

The dynamic material properties of high performance hybrid fiber reinforced cementitious composites (HFRCC) with various volumetric fractions of steel and polyvinyl alcohol (PVA) fibers were studied by the Split Hopkinson Press Bar (SHPB) test. The results show that HFRCC with higher volumetric fraction of steel fibers are more sensitive to stain rate and the dynamic compressive strength increase more prominently with the strain rate increasing, but peak strain shows the opposite trend. The PVA fibers increase the ductility of HFRCC more effectively than steel fibers. Compared to PVA fiber reinforced cementitious composites (FRCC), HFRCC present better dynamic material properties under impact loading.

Improved expanding ring technique for determining dynamic material properties

2013 ◽  
Vol 84 (6) ◽  
pp. 065114 ◽  
Author(s):  
M. Z. Liang ◽  
X. Y. Li ◽  
J. G. Qin ◽  
F. Y. Lu
Keyword(s):  
Material Properties ◽  
Dynamic Material Properties
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