An Analytical Method to Predict Dynamic Response of Cylindrical Composite Shells Subjected to Internal Blast Loading

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Qi Sun ◽  
Qi Dong ◽  
Sha Yang
Keyword(s):  
Analytical Solution ◽  
Dynamic Response ◽  
Analytical Method ◽  
Composite Shell ◽  
Fiber Composite ◽  
Blast Loading ◽  
Composite Shells ◽  
Element Analysis ◽  
Internal Blast Loading ◽  
The Impact

Abstract The dynamic response of composite explosion containment vessels has been widely reported by experimental observations. In this study, we propose an analytical method to predict the dynamic response of open-ended cylindrical composite shells subjected to internal blast loading. The cylindrical composite shell has an out fiber composite shell with an inner steel liner, in which the outer fiber composite shell is simplified as a single elastic layer by an effective modulus in the hoop direction. Considering the impact between two layers during the dynamic response, the analytical solution for response histories of two layers could be obtained. Finite element analysis on the double-layer model is also conducted by ls-dyna. The analytical solution and the simulation result agree well, which demonstrates that the current analytical method can be employed in the design of this composite structure under blast loading.

Dynamic Failure Behavior of Cylindrical Glass Fiber Composite Shells Subjected to Internal Blast Loading

2016 ◽  
Vol 138 (6) ◽  
Author(s):  
Qi Dong ◽  
Penglai Wang ◽  
Chenhong Yi ◽  
Bayi Hu
Keyword(s):  
Glass Fiber ◽  
Fiber Composite ◽  
Blast Loading ◽  
Failure Behavior ◽  
Composite Shells ◽  
Fiber Fracture ◽  
Cylindrical Glass ◽  
Glass Fiber Composite ◽  
Steel Liner ◽  
Internal Blast Loading

The dynamic response of open-ended cylindrical glass fiber composite shells subjected to internal blast loading is studied in the current paper. The experimental observation on response characteristics of cylindrical glass fiber shells is presented, in which failure modes of composite structures are especially concerned. It is found that dynamic buckling may occur in the inner steel liner, which may consequently cause delamination and fiber fracture of the outer glass fiber shell and thus limits the blast loading resistant capability of glass fiber explosion containment vessels. The other failure mode is obvious circular plastic expansion of the inner steel liner and fiber fracture of the outer fiber shell. There exists an interesting case that hoop winding fibers fail but fibers with a winding angle do not fail, based on which the hybrid filament wound method for cylindrical composite containment vessels is proposed. The current study may contribute to further understanding on the design and application of glass fiber composite explosion containment vessels (CECVs).

The Finite Element Analysis of Dynamic Interaction of High-Speed Shinkansen, the Rail, and Bridge

1993 ◽  
Author(s):  
Makoto Tanabe ◽  
Hajime Wakui ◽  
Nobuyuki Matsumoto
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
High Speed ◽  
Response Analysis ◽  
Element Formulation ◽  
Element Analysis ◽  
Finite Element Program ◽  
The Finite Element Analysis ◽  
Element Program ◽  
The Impact

Abstract A finite element formulation to solve the dynamic behavior of high-speed Shinkansen cars, rail, and bridge is given. A mechanical model to express the interaction between wheel and rail is described, in which the impact of the rail on the flange of wheel is also considered. The bridge is modeled by using various finite elements such as shell, beam, solid, spring, and mass. The equations of motions of bridge and Shinkansen cars are solved under the constitutive and constraint equations to express the interaction between rail and wheel. Numerical method based on a modal transformation to get the dynamic response effectively is discussed. A finite element program for the dynamic response analysis of Shinkansen cars, rail, and bridge at the high-speed running has been developed. Numerical examples are also demonstrated.

EFFECT OF RELATIVE DENSITY AND VELOCITY TOWARDS DYNAMIC RESPONSE OF METAL FOAM

2015 ◽  
Vol 76 (9) ◽  
Author(s):  
Mohd Azman Y. ◽  
Juri S. ◽  
Hazran H. ◽  
NorHafiez M. N. ◽  
Dong R.
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Theoretical Prediction ◽  
Relative Density ◽  
Impact Velocity ◽  
Impact Test ◽  
Metal Foam ◽  
Element Analysis ◽  
Static Tests ◽  
The Impact

Dynamic response of ALPORAS aluminium foam has been investigated experimentally and numerically. The dynamic response is quantified by the force produced as the foam deforms as a function of time. Quasi-static tests are conducted to determine the quasi-static properties of the foam. In the impact test, the aluminium foams are fired towards a rigid load-cell and the force signals developed are recorded. Experimental dynamic stress is also compared with theoretical prediction using existing theory. Finite element model is constructed using LS-DYNA to simulate the impact test. Results from the experiment, finite element analysis and theoretical prediction are in acceptable agreement. Finally, parametric studies have been conducted using the verified model to investigate the effect of impact velocity and relative density towards the dynamic response of the foam projectile. It is found that the dynamic response of the foam is more sensitive towards impact velocity as compare with the foam relative density.

Finite Element Analysis of a Single-Layer Reticulated Dome under Impact Loading

2010 ◽  
Vol 163-167 ◽  
pp. 327-331 ◽  
Author(s):  
Liang Zheng ◽  
Zhi Hua Chen
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Impact Force ◽  
Impact Load ◽  
Residual Deformation ◽  
Time History ◽  
Single Layer ◽  
Element Analysis ◽  
Deformation Stage ◽  
The Impact

Finite element model of both the single-layer Schwedler reticulated dome with the span of 50m and a Cuboid impactor were developed, incorporating ANSYS/LS-DYNA. PLASTIC_KINEMATIC (MAT_003) material model which takes stain rate into account was used to simulate steel under impact load. The automatic point to surface contact (NODES TO SURFACE) was applied between the dome and impact block. Three stages of time history curve of the impact force on the apex of the single-layer Scheduler reticulated dome including the impact stage, stable stalemate stage, the decaying stage were generalized according to its dynamic response. It must be pointed out that the peak of the impact force of the single-layer reticulated dome increase with the increase of the weight and the velocity of the impact block, but the change of the velocity of the impact block is more sensitive than the change of weight of the impact block for the effect of the peak of the impact force, and a platform value of the impact force of the single-layer reticulated dome change near a certain value, and the duration time of the impact gradually increase. Then four stages of time history curve of the impact displacement were proposed according to the dynamic response of impact on the apex of the single-layer reticulated dome based on numerical analysis. Four stages include in elastic deformation stage, plastic deformation stage, elastic rebound stage, free vibration stage in the position of the residual deformation.

Impact Experiment and Analysis of the Carbon Fiber Composite Plate with the Central Hole

2013 ◽  
Vol 821-822 ◽  
pp. 158-161
Author(s):  
Kuo Yi Huang ◽  
Gwo Chung Tsai
Keyword(s):  
Composite Plate ◽  
Fiber Composite ◽  
Impact Resistance ◽  
Central Hole ◽  
Carbon Fiber Composite ◽  
Element Analysis ◽  
Absorption Energy ◽  
The Finite Element Analysis ◽  
Teflon Sheet ◽  
The Impact

The composite material plate with the central hole is made by the composite prepreg. During the laying, the circle Teflon sheet is installed into the center of the composite plate. After curing, the center circle area was cut-out and the composite plate with the central hole was observed. Three different central holes are designed by the diameter of 12 mm, 14 mm, and 16 mm. The composite plate with central hole is stroke by the impact-or to measure the absorption energy, and acceleration to compare their impact resistance. The finite element analysis is also used to analyze the mechanical behavior of the plate during and after the impact. The results showed that the energy absorption capability is lower when the central hole became bigger.

scholarly journals Dynamic response and damage analysis of steel box wall under internal blast loading

2019 ◽  
Vol 11 (1) ◽  
pp. 168781401882260
Author(s):  
Duo Zhang ◽  
Shujian Yao ◽  
Fangyun Lu ◽  
Jiangjie Song ◽  
Yuqing Ding
Keyword(s):  
Numerical Methods ◽  
Dynamic Response ◽  
Plate Thickness ◽  
Blast Loading ◽  
Damage Mechanism ◽  
Dimensionless Number ◽  
Damage Mode ◽  
Two Dimensional ◽  
Box Models ◽  
Internal Blast Loading

Different loading conditions, different structural dimensions, or different structural materials will lead to different damage results. In this study, blast experiment of steel box model under internal explosion was conducted and the numerical methods are validated through comparison of experimental and numerical results. Then, a series of multi-box models were built, and a large number of numerical simulations considering two kinds of steel, different plate thickness ranging from 0.005 to 0.025 m, and different TNT explosive mass ranging from 5 to 2000 kg were carried out using the validated numerical methods. Two damage modes, convex damage and concave damage, were observed. The dynamic response and damage mechanism were analyzed, and the results show that the different damage modes of the first wall will lead to different damage results of the second wall. Through dimensional analysis, a two-dimensional dimensionless number for internal blast analysis was suggested. Clear physical meanings are conveyed in the dimensionless number. After that, prediction of the damage modes was studied using the proposed dimensionless number. A damage mode map was plotted based on the two-dimensional dimensionless number, and an empirical equation for rapid prediction of damage mode of steel box wall under internal blast loading is proposed.

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

Check on Structural Strength of Carbon Fiber Composite Field Kitchen Units

2013 ◽  
Vol 690-693 ◽  
pp. 1810-1814
Author(s):  
Xiang Hong Zhang ◽  
Han Yang ◽  
Si Lian Sheng ◽  
Zhan Sheng Gong
Keyword(s):  
Carbon Fiber ◽  
Structural Strength ◽  
Fiber Composite ◽  
Simulation Test ◽  
Carbon Fiber Composite ◽  
Element Analysis ◽  
Composite Field ◽  
Mechanics Analysis ◽  
Box Structure ◽  
The Impact

Field kitchen units is used to guarantee the diet in field operations for troops, a set of field kitchen units includes 3 boxes and 1 tent for kitchen work, cooking staple and non-staple food for 150 people in 1 hour. The weight of units has to be reduced so as to guarantee its application in Tibetan plateau of 5000m as it can be loaded on the vehicle by 2-soldier moving laterally or 3-soldier lifting. Mechanics analysis is carried out in this paper for the structural of latest applied carbon fiber composite units, in an effort to ensure the box can bear the impact generated in the course of transportation and loading, software LS-DYNA is applied to make finite-element analysis to simulate drop simulation test, checking if the strength of box structure reaches the designed requirements.

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