scholarly journals A numerical study of bioinspired nacre-like composite plates under blast loading

2015 ◽  
Vol 126 ◽  
pp. 329-336 ◽  
Author(s):  
E.A. Flores-Johnson ◽  
Luming Shen ◽  
Irene Guiamatsia ◽  
Giang D. Nguyen
Keyword(s):  
Numerical Study ◽  
Blast Loading ◽  
Composite Plates

Experimental and numerical study of a RC member under a close-in blast loading

2016 ◽  
Vol 127 ◽  
pp. 145-158 ◽  
Author(s):  
Ramón Codina ◽  
Daniel Ambrosini ◽  
Fernanda de Borbón
Keyword(s):  
Numerical Study ◽  
Blast Loading

NUMERICAL AND EXPERIMENTAL STUDY ON FREE VIBRATION OF DELAMINATED WOVEN FIBER GLASS/EPOXY COMPOSITE PLATES

2012 ◽  
Vol 12 (02) ◽  
pp. 377-394 ◽  
Author(s):  
J. MOHANTY ◽  
S. K. SAHU ◽  
P. K. PARHI
Keyword(s):  
Experimental Study ◽  
Aspect Ratio ◽  
Free Vibration ◽  
Boundary Conditions ◽  
Natural Frequencies ◽  
Numerical Study ◽  
Shear Deformation Theory ◽  
Composite Plates ◽  
Fiber Glass ◽  
Number Of Layers

This paper presents a combined experimental and numerical study of free vibration of industry-driven woven fiber glass/epoxy (G/E) composite plates with delamination. Using the first-order shear deformation theory, an eight-noded two-dimensional quadratic isoparametric element was developed, which has five degrees of freedom per node. In the experimental study, the influence of various parameters such as the delamination size, boundary conditions, fiber orientations, number of layers, and aspect ratio on the natural frequencies of delaminated composite plates are investigated. Comparison of the numerical results with experimental ones shows good agreement. Fundamental natural frequencies are found to decrease with the increase in the delamination size and fiber orientation and increases with the increase in the number of layers and aspect ratio of delaminated composite plates. The natural frequency of the delaminated composite plate varies significantly for different boundary conditions.

Numerical study on dynamic behaviors of NRC slabs in containment dome subjected to close-in blast loading

2019 ◽  
Vol 135 ◽  
pp. 269-284 ◽  
Author(s):  
Chunfeng Zhao ◽  
Qiang Wang ◽  
Xin Lu ◽  
Jingfeng Wang
Keyword(s):  
Numerical Study ◽  
Blast Loading ◽  
Dynamic Behaviors

An experimental and numerical study of steel tower response to blast loading

Shock Waves ◽  
2009 ◽  
pp. 809-814
Author(s):  
J.D. Baum ◽  
O.A. Soto ◽  
C. Charman
Keyword(s):  
Numerical Study ◽  
Blast Loading

Effect of Helmet Pads on the Load Transfer to Head Under Blast Loadings

2014 ◽  
Author(s):  
Timothy G. Zhang ◽  
Sikhanda S. Satapathy
Keyword(s):  
Load Transfer ◽  
Numerical Study ◽  
Single Layer ◽  
Blast Loading ◽  
Performance Criterion ◽  
Ballistic Performance ◽  
Commercial Code ◽  
Head Assembly ◽  
Computational Simplicity ◽  
Blast Loadings

Recent wars have highlighted the need to better protect dismounted soldiers against emerging blast and ballistic threats. Current helmets are designed to meet ballistic performance criterion. Therefore, ballistic performance of helmets has received a lot of attention in the literature. However, blast load transfer/mitigation has not been well understood for the helmet/foam pads. The pads between the helmet and head can not only absorb energy, but also produce more comfort to the head. The gap between the helmet and head due to the pads helps prevent or delay the contact between helmet shell and the head. However, the gap between the helmet shell and the head can produce underwash effect, where the pressure can be magnified under blast loading. In this paper, we report a numerical study to investigate the effects of foam pads on the load transmitted to the head under blast loading. The ALE module in the commercial code, LS-DYNA was used to model the interactions between fluid (air) and the structure (helmet/head assembly). The ConWep function was used to apply blast loading to the air surrounding the helmet/head. Since we mainly focus on the load transfer to the head, four major components of the head were modeled: skin, bone, cerebrospinal fluid (CSF) and brain. The foam pads in fielded helmets are made of a soft and a hard layer. We used a single layer with the averaged property to model both of those layers for computational simplicity. Sliding contact was defined between the foam pads and the helmet. A parametric study was carried out to understand the effects of material parameters and thickness of the foam pads.

scholarly journals Structural Analysis of a Freight Wagon with Composite Walls

2019 ◽  
Vol 57 (2) ◽  
pp. 140-151
Author(s):  
Alexandru Ionut Patrascu ◽  
Anton Hadar ◽  
Stefan Dan Pastrama
Keyword(s):  
Finite Element ◽  
Total Mass ◽  
Mechanical Response ◽  
Numerical Study ◽  
Composite Plates ◽  
The Body ◽  
Finite Element Analyses ◽  
Vehicle Structure ◽  
Composite Walls ◽  
Different Thickness

The paper presents a numerical study regarding the mechanical response of the body of a freight wagon to the usual loads encountered during service. The main goal of the present research is to investigate the possibility to replace the steel walls of the wagon with walls made of laminated composites. In this way, the total mass of the wagon can be decreased, leaving room for supplementary load of goods. Finite element analyses of the wagon with steel walls is presented first, in order to show that most of the load is taken by the structure of the wagon, while the stresses in the walls are low. Further, composite plates with different thickness are studied to find the minimum value of thickness for which the displacements have values below a certain range. These thicknesses are further considered in the finite element analyses of the entire wagon with composite walls to investigate if the new walls significantly change the stresses in the vehicle structure. It was concluded that the replacement does not alter the stress state in the structure, and, consequently, it is a good solution for diminution of the total mass of the vehicle.

Experiment and numerical study on dynamic response of liquid cabin under internal blast loading

2019 ◽  
Vol 145 ◽  
pp. 106405 ◽  
Author(s):  
Ying Li ◽  
Lei Zhang ◽  
Dengbao Xiao ◽  
Tian Zhao ◽  
Zhipeng Du ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Numerical Study ◽  
Blast Loading ◽  
Internal Blast Loading
Sign in / Sign up

Export Citation Format

Share Document