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Journal articles on the topic 'LS-DYNA impact simulation'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Likhonina, Raissa. "FINITE ELEMENT MODELLING AND SIMULATION OF VEHICLE IMPACT ON STEEL SAFETY BARRIERS." Acta Polytechnica 56, no. 6 (December 31, 2016): 455–61. http://dx.doi.org/10.14311/ap.2016.56.0455.

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This paper deals with a FEA simulation of the vehicle crash with steel safety barriers in ANSYS LS-DYNA® 15.0. Two types of safety barriers are used: JSNH4/H2 and JSAM-2/H2. A geometrical model of the barrier in the Modeler ANSYS® Workbench™ 15.0 was created and after that it was transformed into LS-DYNA® 15.0 to complete the crash test simulation. After computation in solver ANSYS LS-DYNA® 15.0 the results of the simulation such as impact forces, a body displacement and an integral energy were analyzed.

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2

Gentry, T. Russell, and Lawrence C. Bank. "Finite-Element Modeling and Model Verification of Steel W-Beam Guardrails Subject to Pendulum Impact Loading." Transportation Research Record: Journal of the Transportation Research Board 1647, no. 1 (January 1998): 147–57. http://dx.doi.org/10.3141/1647-18.

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The experimental and simulated response of steel W-beam guards to pendulum impact loading for impact velocities of 20 km/h, 30 km/h, and 35 km/h are presented. The guardrails were supported by four posts and cable-anchored at each end to ensure that the full tension capacity of the rail could be developed. Experiments carried out with a 912-kg impact pendulum are compared with LS-DYNA finite-element simulations of the impact events. Pendulum tests were completed at the Turner Fairbank Highway Research Center of the Federal Highway Administration. Acceleration, velocity, and displacement time histories are compared for the pendulum impact test and the LS-DYNA simulations. Comparison of the experimental and simulation acceleration records is made using the Numerical Analysis of Roadside Design time-domain statistics. The comparative statistics show that the simulations are in good agreement with the experiments. Guardrail tension data and cable tension data are presented from the LS-DYNA simulations. Results show that the guardrail was close to its tension yield point when impacted an initial velocity of 35 km/h.

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3

Zhao, Gui Fan, Zi Peng Zhang, and Tso Liang Teng. "Finite Elements Analysis on the Impact Absorption Behavior of Composite Vehicle Longeron." Advanced Materials Research 183-185 (January 2011): 1913–17. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1913.

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In this paper, an experimental model was built in the nonlinear finite element software LS-DYNA. A metal tube wrapped fiberglass epoxy composite outside (called “composite tube” for short) was impacted in its axial direction in the simulation. The key problems about building the model were discussed later. Comparing the simulation and experiment results, we proved the validity of the model. Furthermore, we applied the material type of the composite tube to vehicle longeron, and carried on the simulation of automobile frontal collisions in LS-DYNA. The simulation results showed using the new type composite material could reduce the longeron weight to original 33.76% without lowering the safety.

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4

Yoo, Tae Kwang, and Tong Qiu. "Optimization of constitutive model parameters for simulation of polystyrene concrete subjected to impact." International Journal of Protective Structures 9, no. 2 (June 20, 2017): 121–40. http://dx.doi.org/10.1177/2041419617716496.

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This article presents the results of a series of experimental testing and numerical modeling studies to optimize the parameters of a constitutive material model to accurately simulate the behavior of polystyrene crushable concrete during impact loading using LS-DYNA. Quasi-static compression tests and confined drop impact tests were conducted. To model the quasi-static compression tests, the response surface methodology was used to optimize Poisson’s ratio and friction angle in the pseudo-tensor model in LS-DYNA. Using the optimized model parameters, the simulated compression stress versus strain relationship showed an excellent agreement with those from the compression tests. To model the confined drop impact tests, the strain rate sensitivity parameter in LS-DYNA was optimized by comparing the drop impact simulations at different strain rate sensitivity values with the drop impact tests. This study suggests that the pseudo-tensor material model is potentially suitable for modeling crushable concrete. Although the optimized constitutive model parameters are specific for the polystyrene concrete mix used in this study, similar approach can be used to optimize model parameters for other polystyrene concrete mixes.

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5

Zhu, Xiu Yun, Rong Pan, and Feng Sun. "FEM Analysis of Impact Tests for Steel Plate Concrete Panels against Scaled-Aircraft Impact." Applied Mechanics and Materials 477-478 (December 2013): 777–83. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.777.

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Due to the rear-face steel plate of the steel plate concrete wall (SC) is very effective in preventing the perforation and scabbing of concrete, in order to resist the impact of commercial aircraft crash, steel plate concrete structures are usually used in the design of external walls of nuclear power plants. In this paper, the simulation analysis of the impact test of 1/7.5 scaled aircraft model impacting the steel plated concrete panels is carried out by using finite element code ANSYS/LS-DYNA. The Winfrith material model (*MAT_84) in ANSYS/LS-DYNA is used to simulate the concrete. The damage profile of panels and residual velocity of aircraft engine comparisons between the simulations and tests are presented in this paper. The results indicate that the damage modes from the impact simulations are very good agreement with the experimental result. It is verified that not only the selection of the material parameters needed for the steel plated concrete wall and aircraft model but also the entire analysis method was appropriate and effective. This paper provided the effective methodology for simulation of the response of the steel plated concrete structure of nuclear power plant due to commercial aircraft crash impact.

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6

Chen, Yu Feng, and Guang Xiang Yi. "Dynamic Response Analysis of the Reinforced Concrete Column under the Effect of Explosive Impact Load." Advanced Materials Research 681 (April 2013): 99–104. http://dx.doi.org/10.4028/www.scientific.net/amr.681.99.

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This paper does the data simulation analysis by using the large-scale finite element nonlinear ANSYS/LS-DYNA software. It chooses the MAT111(MAT-JOHNSON-HOLMQUIST -CONCRETE）concrete materials and the MAT3 (MAT-PLASTIC-KINEMATIC) reinforcement material model in ANSYS/LS-DYNA finite element software, builds the separating RC column finite element model, dynamically simulates the hurting process of RC column under the effect of explosive impact load, and mainly does research into the damage degree of RC column under different effects of explosive load of different peak pressures.

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7

McKown, S., and Robert A. W. Mines. "Measurement of Material Properties for Metal Foam Cored Polymer Composite Sandwich Construction." Applied Mechanics and Materials 1-2 (September 2004): 211–16. http://dx.doi.org/10.4028/www.scientific.net/amm.1-2.211.

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Material properties are required for the numerical simulation of the impact progressive collapse of metal foam cored polymer composite sandwich beams, using LS-DYNA. As far as the metal foam, Alporas, is concerned, multi-axial tension and compression data is required. This includes large scale crush and tensile rupture. An Arcan test fixture was developed, in which a sample of foam can be subject to tensile and shear deformation simultaneously. The data was also used to calibrate the crushable foam material model in LS-DYNA. For the skin, tensile and compression data was generated for a cross ply glass fibre thermoplastic laminate. The data was then used to calibrate the composite damage material model in LS-DYNA. Inclusion of calibrated material models into the simulation of the progressive collapse of metal foam cored composite sandwich beams will be briefly discussed.

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8

Marcicki, James, Min Zhu, Alexander Bartlett, Xiao Guang Yang, Yijung Chen, Theodore Miller, Pierre L'Eplattenier, and Iñaki Caldichoury. "A Simulation Framework for Battery Cell Impact Safety Modeling Using LS-DYNA." Journal of The Electrochemical Society 164, no. 1 (2017): A6440—A6448. http://dx.doi.org/10.1149/2.0661701jes.

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9

Wang, X. G., Wei Guo, and Jian Qin Liu. "Explicit Dynamics Simulation Research on Soil Cutting of Shield Machine Based on LS-DYNA." Materials Science Forum 697-698 (September 2011): 642–45. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.642.

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In this paper, the universal nonlinear finite element software LS-DYNA is applied to the explicit dynamics simulation of shield’s soil cutting in tunneling, and using Non-reflective boundary of DYNA’s module, accurately conduct the dynamic analysis of shield’s tunneling. Finally Making visualization processing on the computed results with the post-processing soft LS-PREPOST. Compared with results of static’s simulation and small-sized shield experiment indoor, the explicit dynamics simulation used in the paper is in good agreement with them. Through the alleosis chat of internal energy, we can see that LS-DYNA can be commendably utilized to explicit dynamics simulation of soil cutting of shield’s cutter, simultaneously, we also concluded that moderately increasing the cutter opening rate will have a significant impact on improving the unearthed rate of soil residue, tunneling efficiency and lowering the total thrust force of the shield.

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10

Lin, Min, Bao Jun Pang, and Jin Cheng. "Experimental and Numerical Study on the Mesh Bumper by Hypervelocity Impact." Advanced Materials Research 457-458 (January 2012): 108–12. http://dx.doi.org/10.4028/www.scientific.net/amr.457-458.108.

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In order to systematically explore the properties of the mesh bumper under hypervelocity impact, the quantitative research of protect characteristics was carried out with the numerical simulation. The experiments, in which the projectile impacted the multi-layers mesh bumper at hypervelocity, were simulated using the Ls-Dyna hydro-codes. The results for simulations and experiments were compared and analyzed. The effectiveness and accuracy of the simulation model is proved. It is shown that the morphologies of debris cloud were obviously varied with the change of impact position.

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11

He, Yan Bin, Xiao Hu Yao, Xuan Liu, and Ling Feng He. "Simulation for the Bird-Strike Damage of Drone Radome Composite Structure." Applied Mechanics and Materials 151 (January 2012): 305–9. http://dx.doi.org/10.4028/www.scientific.net/amm.151.305.

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The low and medium speed bird-strike impact damage of sandwich composite structure of drone radome during takeoff and landing is examined by numerical simulations, using nonlinear dynamic finite element analysis software LS-DYNA. For different impact velocities, the aircraft radome’s dynamic responses are obtained and the damage in composite panel is clearly demonstrated. The relations of impact energy, maximum impact force and the damage state are analyzed. The simulation results can provide some references for the aircraft radome design.

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12

Zhang, Wenna, Feng Liu, and Feng Xi. "Lateral Torsional Buckling of Steel Beams under Transverse Impact Loading." Shock and Vibration 2018 (2018): 1–15. http://dx.doi.org/10.1155/2018/4189750.

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This study employs experiments and numerical simulation to analyze the dynamic response of steel beams under huge-mass impact. Results show that lateral torsional buckling (LTB) occurs for a narrow rectangular cross-section steel beam under transverse impact. The experiments were simulated using LS-DYNA. The numerical simulation is in good agreement with experimental results, thus indicating that the LTB phenomenon is the real tendency of steel beams under impact. Meanwhile, the study shows that LS-DYNA can readily predict the LTB of steel beams. A numerical simulation on the dynamic response of H-shaped cross-section steel beams under huge-mass impact is conducted to determine the LTB behavior. The phenomenon of dynamic LTB is illustrated by displacement, strain, and deformation of H-shaped steel beams. Thereafter, a parametric study is conducted to investigate the effects of initial impact velocity and momentum on LTB. The LTB of H-shaped cross-section steel beams under transverse impact is primarily dependent on the level of impact kinetic energy, whereas impact momentum has a minor effect on LTB mode.

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13

Zhang, Zi Peng, Gui Fan Zhao, Tso Liang Teng, and Yang Wang. "Analysis and Application of the Impact Absorption Behavior of the Composite Tube." Applied Mechanics and Materials 470 (December 2013): 510–15. http://dx.doi.org/10.4028/www.scientific.net/amm.470.510.

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Composite tube is one new kind of multi-material shell structures. It has both of metal and composite energy absorption advantage. In order to find the energy absorption characteristic of composite tube and put it into use, the Drop-Weight Tear Test (DWTT) was carried out. The LD2Y aluminum was chosen as the inner metal material which was wrapped fiberglass epoxy composite outside. During the test, the displacement signal and velocity signal, acceleration signal were got by piezoelectric acceleration transducer. Furthermore, the DWTT test of the composite tube was simulated in LS-DYNA, and proved the validity of the model by comparing the simulation results with the experiment results. We established the vehicle front longitudinal beam model with the material type of the composite tube, and carried out the simulations of whole car collisions in LS-DYNA according to FMVSS 208. Through the analysis of occupant head injury got from the simulations, we got the result that using the composite tube material could not only elevate the cars safety but also reduce front longitudinal beam weight effectively.

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14

Oloeriu, Florin, Oana Mocian, Roxana Nedelcu, Dănuţ Grosu, and Constantin Ilie. "Ballistic Impact: A Comparative Case Study Using Lagrangian Method with Erosion Criterion and SPH." Advanced Materials Research 1036 (October 2014): 568–73. http://dx.doi.org/10.4028/www.scientific.net/amr.1036.568.

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The ballistic simulation attempted in this work is among the most difficult as both the projectile and the target experience significant deformations. Traditionally these simulations have been performed using a Lagrangian approach, i.e. a deformable mesh with large mesh deformations. There are three often used techniques when studying ballistic problems with the Lagrangian method: remeshing (generally not available for 3D hexahedra meshes), the 'pilot hole' technique and material erosion. Because these techniques imply element removal, in order to allow the calculation to continue, the Lagrangian method lacks a physical basis. Moreover, no general guidance exists for selecting one of the three techniques mentioned before. The Smoothed Particle Hydrodynamic method as implemented in the commercial code LS-DYNA has been used in this paper to solve the problem of the impact between different caliber projectiles and various types of metal targets. The results are compared to those produced by dynamic analysis using conventional finite element methods with material erosion as implemented in LS-DYNA.

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15

Liu, Wei, Jie Song, Hua Guan, Xiao Han, Jian Zhong Wu, Wen Ge Yang, and Xiao Pan Li. "Strain Measurement in the Steel Shell Surface Impacted by a Falling Ball." Applied Mechanics and Materials 548-549 (April 2014): 401–5. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.401.

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In order to study the maximum strain of steel shell surface under the impact of a falling ball, a thin shell model and the strain time history curves of impact are achieved by ANSYS/LS-DYNA. A deformation behavior of the shell was calibrated from the test which uses a ball free fall and some resistance strain gauges pasted to the inner surface of an iron shell box. The gauges are connected as inputs to a Wheatstone bridge circuit and an Oscilloscope is used to observe the output. The results show the impact test and ANSYS/LS-DYNA simulation results are smoothly consistent with the strain of the test at the maximum strain amplitude of the model, and the maximum difference is 9.5%. Accurate results can be achieved by combining the test method and the simulation approach as an industrial application.

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16

Qi, Xiaoli, and Xiaochun Yin. "Sub-impacts of simply supported beam struck by steel sphere—part II: Numerical simulations." Advances in Mechanical Engineering 9, no. 1 (January 2017): 168781401668335. http://dx.doi.org/10.1177/1687814016683351.

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This part of the article describes numerical simulations of the problem investigated experimentally. A three-dimensional finite element model of elastic–plastic for sphere falling on beam has been implemented using the nonlinear dynamic finite element software LS-DYNA. From the numerical simulations, it was found that the LS-DYNA is suitable to study complex sub-impact phenomenon, and good agreement is in general obtained between the simulation and experimental results. The numerical simulations show that the initial impact velocity, equivalent elasticity modulus, contact curvature radius of the sphere, and equivalent mass have great influence on the contact–impact time of the sub-impact, and an applicable range of the theoretical expression of contact–impact time of the sub-impact was determined. In addition, the numerical simulations demonstrate the ratios of maximum amplitudes of the first-, second-, and third-order vibrations to the maximum amplitudes of the beam vibrations, and the phase angle of the first-order vibration will change suddenly when the sub-impacts occur. Furthermore, the occurrence conditions of the sub-impacts were clarified numerically. It was found that the occurrence conditions of the sub-impacts can be represented by a mass ratio threshold, and the thickness or length of the beam has also a great influence on the occurrence of the sub-impacts. Once the sub-impacts occur, which would result in an uncertain behavior of the apparent coefficient of restitution.

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17

Bakulina, Arina, and Andrey Buzyurkin. "A comparative analysis of several material models in LS-DYNA at high velocity impact." EPJ Web of Conferences 221 (2019): 01007. http://dx.doi.org/10.1051/epjconf/201922101007.

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The questions of application of the LS-DYNA finite element analysis package for describing the interaction of a spherical projectile and a massive metal obstacle are considered. Based on a comparison of the results of numerical simulation with experimental data, a qualitative possibility has been shown to determine the magnitude of the dynamic hardness of the obstacle material.A simulation of the collision of a spherical impactor and a massive metal barrier shaped as a cube is performed. Data are obtained on the penetration of the striker into the barrier.Using the simulation curve, the values of the dynamic hardness of the obstacle were restored and a comparison was made with their experimental values. The qualitative correspondence is shown.

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18

Zhang, Xiao Qing, Xuan Liu, and Xiao Hu Yao. "The FEM Analysis on the Damage of Wing Leading Edge under Hail Impact." Advanced Materials Research 460 (February 2012): 330–33. http://dx.doi.org/10.4028/www.scientific.net/amr.460.330.

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The low and medium speed impact damage of composite structure of wing leading edge under hail impact is examined by numerical simulations, using nonlinear dynamic finite element analysis software LS-DYNA. For different impact velocities, the dynamic responses of wing leading edge are obtained and the damage in composite panel is clearly demonstrated. The relations of impact energy, maximum displacement and the damage state are analyzed. The simulation results can provide some references for the design of wing leading edge.

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19

Yang, Yun Chuan, and Xu Wang. "3D Numerical Simulation of Point Impact Breakage of a Glass Ball." Advanced Materials Research 299-300 (July 2011): 1012–15. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.1012.

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Based on the 3D plane impact and 2D MCA numerical simulation, the 3D ANSYS/LS-DYNA software is applied to conduct numerical simulations on two kinds of impact breaking process of a glass ball, during which spallation phenomenon occur. The Von Misses stress of each node changes with the time as the result of the stress waves spreading, reflecting and overlapping within the material. The stereograms and profiles from the simulation results reveal that the stress of each node changes with the time. By comparing the simulation results of plane impact and 2D point impact, differences and similarities between these processes are illustrated in this paper, which reflects the complexity of mechanics in the processes.

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20

Guo, H., W. Yang, L. Liu, X. K. Yang, Y. G. Wang, L. Chen, and H. Ge. "Simulation Analysis of RuT450 Drilling Force Based on LS-DYNA Gun Drilling." Key Engineering Materials 764 (February 2018): 271–78. http://dx.doi.org/10.4028/www.scientific.net/kem.764.271.

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Cutting force is one of the most important parameters in the machining process, it significantly influenced machining precision of the workpiece, power consumed in the machining process, wear of the cutting tools and so on. There are many factors that affect the cutting force, such as the performance of the workpiece material, cutting speed, usage of the cutting fluid, etc. Single factor variable method was used in this paper, RuT450 was used as workpiece, welded cemented carbide gun drill was used as cutting force and LS-DYNA was used as simulation platform to established the cutting simulation model to analyzed the impact of the cutting speed and feed rate to the drilling force. Simulation results show that, at the low speed drilling stage, drilling force increases with the increase of the feed rate and decreases with the increase of the rotation feed, from the stress cloud it could be seen that the equivalent stress near the drill tip reached the maximum in the drilling process.

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21

Jr, Norman F. Knight, Navin Jaunky, Robin E. Lawson, and Damodar R. Ambur. "Penetration simulation for uncontained engine debris impact on fuselage-like panels using LS-DYNA." Finite Elements in Analysis and Design 36, no. 2 (September 2000): 99–133. http://dx.doi.org/10.1016/s0168-874x(00)00011-1.

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22

Madurapperuma, M. A. K. M., and Kazukuni Niwa. "Concrete Material Models in LS-DYNA for Impact Analysis of Reinforced Concrete Structures." Applied Mechanics and Materials 566 (June 2014): 173–78. http://dx.doi.org/10.4028/www.scientific.net/amm.566.173.

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Performance of three widely used concrete material models available in LS-DYNA is compared using experimental results of drop-weight impact on a reinforced concrete (RC) beam and high speed aircraft engine missile impact on an RC wall. An overview of these material models and typical concrete material behavior shown by these models using single element analysis are also presented. The study is useful for users who have limited experience on the selection of an appropriate material model for concrete in impact simulation of RC structures.

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23

Zhang, Xiao Qing, and Xuan Liu. "The Damage of Sandwich Composite Structure of Aircraft Radome under Debris-Strike." Applied Mechanics and Materials 63-64 (June 2011): 515–18. http://dx.doi.org/10.4028/www.scientific.net/amm.63-64.515.

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The low and medium speed impact damage of sandwich composite structure of aircraft radome shield under debris-strike during takeoff and landing along runway is examined by numerical simulations, using nonlinear dynamic finite element analysis software LS-DYNA. For different impact velocities, the dynamic responses of aircraft radome shield are obtained and the damage in composite panel is clearly demonstrated. The relations of impact energy, maximum impact force and the damage state are analyzed. The simulation results can provide some references for the design of aircraft radome.

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Wang, Zi Jian, and Sheng Xie Xiao. "Rockfall on the Slope of the Embankment of Finite Element Analysis of the Impact of the Impact." Advanced Materials Research 261-263 (May 2011): 1119–23. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1119.

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This article in a typical road slope model as an example, through large-scale general-purpose finite element simulation software ANSYS/LS-DYNA rockfall on the slope of the roadbed impact for three-dimensional dynamic analysis in the roadbed, slope geological parameters and falling stone initial state is not at the same time on the roadbed impact the results of comparative analysis. The result is the mountain slope of the road construction project provides reference.

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Wang, Jin Long. "Buckling Analysis of the Copper Pipe Under the Action of Axial Impact Loading." Advanced Materials Research 368-373 (October 2011): 303–6. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.303.

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The numerical simulation on buckling test copper pipe is carried out with dynamic finite element software LS-DYNA. The results clearly reflect deformation, stress, and strain of copper pipe in different moment. This method overcomes the weaknesses and shortcomings of experimental analysis, which provides a new method for buckling analysis of under the action of axial impact loading.

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Chen, Jin Xin, Jun Xun Zhang, Zai Xiang Zheng, and Xue Dong Qi. "Optimization and Experimental Research on FOPS of Engineering Vehicle Cab." Applied Mechanics and Materials 621 (August 2014): 187–94. http://dx.doi.org/10.4028/www.scientific.net/amm.621.187.

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The engineering vehicle cab FOPS (falling-object protective structures) mainly contain two parts: top guard and front guard. According to the characteristics of the engineering vehicle cab security architectures, the simulation that top guard is impacted by the falling hammer is made by non-linear analysis software – LS-DYNA. The breakage phenomenon is also researched. The stiffness of the top guard is so weak that the hammer’s displacement is too large, which leads to the impact resistance of top guard is unqualified. Based on this, the cause of the stiffness insufficient is researched. By orthogonal experimental design for the dominant factors, it makes the simulation performance of the top guard meet the requirements of the national standard. On this basis, the simulation mechanical bearing capacity of the front guard is done by LS-DYNA, while the experimental research is also accomplished. By contrasting the result of simulation and experiment, it turns that simulative result coincides with the experimental well.

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Tong, Hai Long, Zhong Hai Liu, Li Yin, and Quan Jin. "The Dynamic Finite Element Analysis of Shearer’s Running Gear Based on LS-DYNA." Advanced Materials Research 402 (November 2011): 753–57. http://dx.doi.org/10.4028/www.scientific.net/amr.402.753.

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Base on contact kinetics finite element theory, proceed secondary development of road wheel and pin mesh’s nonlinear dynamic contact analysis in LS-DYNA module, and carry out contrast of simulation analysis, achieved stress, strain and dynamic identities that caused by meshing impact in the whole meshing process, accord with practice, can instruct product practice design.

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Zhang, Yong Kang, and Yu Long Li. "Analysis of the Anti-Bird Impact Performance of Typical Beam-Edge Structure Based on ANSYS/LS-DYNA." Advanced Materials Research 33-37 (March 2008): 395–400. http://dx.doi.org/10.4028/www.scientific.net/amr.33-37.395.

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The 3-D finite element analysis model of beam-edge structure with spaced multiple layers under bird impact is established. Numerical simulations are implemented by using the non-linear contact-impact code ANSYS/LS-DYNA when the birds collide at three locations of the structure respectively. The failure process of the structure and the equivalent plastic strain at supports are obtained. The residual strength of the structure after impact is predicted. The results show that the front spars are penetrated or cracked after the leading edge is perforated. The equivalent plastic strain at the support is much higher when the bird impacts the structure at the central location. Both the structure deformation and failure mode from the simulation are consistent with the results of full scale test, which proves the validity of the method proposed in this paper.

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Raguraman, M., A. Deb, and G. Jagadeesh. "A numerical study of projectile impact on thin aluminium plates." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 11 (July 27, 2009): 2519–30. http://dx.doi.org/10.1243/09544062jmes1523.

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This article deals with a simulation-based study of the impact of projectiles on thin aluminium plates using LS-DYNA by modelling plates with shell elements and projectiles with solid elements. In order to establish the required modelling criterion in terms of element size for aluminium plates, a convergence study of residual velocity has been carried out by varying mesh density in the impact zone. Using the preferred material and meshing criteria arrived at here, extremely good prediction of test residual velocities and ballistic limits given by Gupta et al. (2001) for thin aluminium plates has been obtained. The simulation-based pattern of failure with localized bulging and jagged edge of perforation is similar to the perforation with petalling seen in tests. A number of simulation-based parametric studies have been carried out and results consistent with published test data have been obtained. Despite the robust correlation achieved against published experimental results, it would be prudent to conduct one's own experiments, for a final correlation via the present modelling procedure and analysis with the explicit LS-DYNA 970 solver. Hence, a sophisticated ballistic impact testing facility and a high-speed camera have been used to conduct additional tests on grade 1100 aluminium plates of 1 mm thickness with projectiles of four different nose shapes. Finally, using the developed numerical simulation procedure, an excellent correlation of residual velocity and failure modes with the corresponding test results has been obtained.

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Rahman, Mustafizur, Evgeny V. Morozov, Krishna Shankar, and Alan Fien. "Computational Analysis of Low Velocity Impact Response of Composite Panels." Applied Mechanics and Materials 157-158 (February 2012): 1135–38. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.1135.

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The present work deals with the finite element modelling of low velocity impact response of different types of composite panels for body armour application. The response of these composites panels including bonded, unbonded and partially bonded laminates has been simulated using non-linear finite element package LS-DYNA. 2D shell elements in LS-DYNA have been used to represent both resin bonded glass fabric targets and dry woven glass fabric panels. The hemispherical shaped projectile is being modelled with 3D solid elements. The results of the numerical analysis showed that the value of contact force for the fully bonded composites panels was significantly higher than that observed for the panels consisting of dry woven glass fabric. However, the corresponding displacement was substantially lower. The similar simulation of the partially bonded composite panels has shown a reduction of both the contact force and the displacement. In addition, it has been shown that the partially bonded composite panels are capable of absorbing higher levels of energy than the rigid panels.

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Lei, Zheng Bao, Lan Yang, and Mu Xi Lei. "Rules of CST Blunt Edge Roundness and the Influence on Collision Characteristics." Applied Mechanics and Materials 204-208 (October 2012): 4831–34. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.4831.

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This study is based on UG and finite element simulation software VPG and LS-DYNA to simulate,finally get how the automotive quality,impact speed and angle influence on rounded cutting edge rules of CST and collision characteristics .So provide a strong basis to the application of CST and car safety.

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Chen, Chaoming, Fadong Zhao, Hongtao Bao, and Hongwei Zhuang. "Comparative Study on Numerical Simulation of Thorax Blunt Impact Based on LS-DYNA Software Technology." Journal of Physics: Conference Series 2010, no. 1 (September 1, 2021): 012039. http://dx.doi.org/10.1088/1742-6596/2010/1/012039.

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Chordiya, Yash M., and Manmohan Dass Goel. "Numerical Simulation of Low Impact Velocity Behaviour of Polymeric Syntactic Foam." Advanced Science, Engineering and Medicine 12, no. 8 (August 1, 2020): 1044–49. http://dx.doi.org/10.1166/asem.2020.2666.

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In this study a FE model is prepared for drop weight impact hammer testing of polymeric syntactic foam. The foam is modelled using crushable foam material and hammer is modelled using bilinear material model of LS-DYNA®. A series of simulation is performed by varying density of foam and impact velocity of hammer. Based on the prepared FE model and the force-displacement relation, energy absorption of the foam is computed and compared for three densities and three velocities. A comparative study is presented based on the displacement, reaction force-time history, and forcedisplacement behaviour.

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Fu, Yu, Yun Peng, and Yong Yao. "Numerical Simulation and Analysis of Penetrating Concrete Slabs." Advanced Materials Research 446-449 (January 2012): 3833–36. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.3833.

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By using the FEM code LS-DYNA, Hanchak’s test of penetrating concrete slabs was simulated with two concrete models respectively. The two models were K&C and HJC (MAT72R3 and MAT111) which have been added the maximum principal strain as a material erosion criterion. The impact response of concrete slab and projectile has been compared with the test data for different models with the different control parameter settings, and finally, the optimal model and the parameter settings were determined.

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Fang, Yuan, and Fan Tian Xia. "Dynamic Research of Knitting Element for Computerized Flat Knitting Machine Based on ANSYS/LS-DYNA." Advanced Materials Research 472-475 (February 2012): 488–93. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.488.

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Based on research on the knitting processes, an impact mechanic model for knitting elements was established to investigate the variation of the impact force in vertical direction between the cam and the select jack. The variation of the displacement, velocity, acceleration of the select jack and the stability for the needles’ moving has been confirmed by the simulation of knitting process based on the software ANSYS/LS-DYNA. Furthermore, the variation of the select jack has been confirmed by experimental measurement during the knitting process. The data of the experiment results were in accordance with the ANSYS’ simulation which verified the correctness of the ANSYS’ analysis. It provided a theoretic basis for the design of computerized flat knitting machines.

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Wilde, Krzysztof, Kazimierz Jamroz, Dawid Bruski, Marcin Budzyński, Stanisław Burzyński, Jacek Chróścielewski, and Wojciech Witkowski. "Curb-to-Barrier Face Distance Variation an a TB51 Bridge Barrier Crash Test Simulation." Archives of Civil Engineering 63, no. 2 (June 27, 2017): 187–99. http://dx.doi.org/10.1515/ace-2017-0024.

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Abstract This paper addresses the problem of road safety regarding barrier placement as relative to the curb. A short summary of existing regulations is presented. Numerical simulations using the explicit finite element system Ls-Dyna are shown. In the analysis, variable distance between the barrier and the curb is assumed. The obtained result reveals that the distance has little impact on the working width of the barrier.

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Chang, Liu Hong, Chang Bo Jiang, Man Jun Liao, and Xiong Xiao. "Nonlinear Dynamic Response of Buoys under the Collision Load with Ships." Applied Mechanics and Materials 204-208 (October 2012): 4455–59. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.4455.

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The explicit dynamic finite element theory is applied on the collision of ships with buoys for computer simulation. Using ANSYS/LS-DYNA finite element analysis software, the numerical simulation of the collision between the ton ship and the buoy with different structures and impact points. The collision force, deformation, displacement parameters and the weak impact points of a buoy are obtained. Based on the numerical simulation results, analysis of buoys and structural collision damages in anti-collision features are discussed, and several theoretical sugestions in anti-collision for the design of buoy are provided.

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Zou, Roger, Dong Ruan, and Guo Xing Lu. "Finite Element Simulation of Aluminium Foam Sandwich Panels Subjected to Impact Loading." Advanced Materials Research 261-263 (May 2011): 761–64. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.761.

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One potential application of aluminium foam sandwich panels in civil engineering is the cladding system which is employed to protect other structures again impact and blast loadings. Finite element (FE) simulation of these sandwich panels subjected to impact loading was conducted by using a commercial software package, LS-DYNA (version 971). The FE model was verified by experimental results conducted previously. Good agreement was achieved between the FE and experimental results. Parametric study was conducted to investigate the effects of skin thickness, core thickness and boundary conditions on the deformation modes and energy absorption of sandwich panels with aluminum foam core.

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Buang, Ziamah B., and S. M. Kashif. "Simulation of Low Velocity Impact Test on Carbon/Epoxy Composite Plates." Advanced Materials Research 1115 (July 2015): 523–26. http://dx.doi.org/10.4028/www.scientific.net/amr.1115.523.

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Composite materials that have low weight and high strength properties are currently one of the promising materials for a vehicle’s body. However, the effect of low velocity impact on composite may cause failure through matrix cracking, fibre breakage and delamination which may reduce the structure strength. Low velocity impact can be analysed either by experimentation or numerical simulation. Numerical simulation which is also known as finite element analysis can show the degradation of the composite structure properties after an impact loading condition without doing any experimentation. Thus, in this paper, LS-DYNA is the finite element analysis software that is used to simulate a low velocity impact on composite structures.

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Mi, Peng, Sen Liang, and Sarah Zhang. "Numerical Simulation of Embedded and Co-Cured Composite Damping Structure under Low Velocity Impact." Advanced Materials Research 311-313 (August 2011): 1961–66. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1961.

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Embedded and co-cured composite damping structure is a novel damping processing structure, which possesses excellent damping properties and mechanical performances. In this paper, explicit dynamic analysis software LS-DYNA is employed to simulate low velocity impact on embedded co-cured composite damping structure panels. To illustrate the validity of modeling and calculation method, the simulation results are compared with the experimental data. And the results show that the impact resistance of embedded co-cured composite damping structure is much better than composite panel without damping material.

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Nguyen, Huan Khac. "Investigation of material effects on the passenger car’s frame structures in case of collision by Ansys LS-DYNA." Science and Technology Development Journal 18, no. 4 (December 30, 2015): 65–71. http://dx.doi.org/10.32508/stdj.v18i4.987.

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This paper evaluated the effect of auto framing materials to passenger in collisions by Ansys LS-DYNA simulation software and analysis data by Hyperview software. Process simulation helps authors problem research, survey the feasibility of replacing traditional steel materials in the automotive manufacturing industry in Vietnam by carbon fiber composite materials. In addition, the simulation also allows the author to easily change the contact angle, the velocity of impact on a flexible, easy to achieve high economic efficiency during the actual test.

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Liu, Peng, Hong Wang, and Chao Zhu. "Numerical Simulation Analysis of Collision between Ship and Steel Sheet Pile Quay-Wall." Applied Mechanics and Materials 744-746 (March 2015): 1175–79. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.1175.

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The impact process of 50000t ship and steel sheet pile bulkhead is simulated by finite element software ANSYS/LS-DYNA. This article acquires the impact force-time curve, equivalent force-time curve of steel sheet pile and the pressure-time curve of breast wall. Comparing the impact force of numerical simulation with the result of ship-bridge collision specifications, and general rules and characteristics are obtained. At the same time, put forward some measures to prevent the damage of wharf structure under the ship of large velocity impact, which provide theoretical references during the design, maintenance, and transformation of similar wharf.

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Rabbani, Khawar, Mike Daniels, Neil Walker, and Bez Shirvani. "Material Behaviour Modelling for Finite Element Vehicle Crash Simulation." Key Engineering Materials 410-411 (March 2009): 521–32. http://dx.doi.org/10.4028/www.scientific.net/kem.410-411.521.

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Vehicle safety has increasingly become an economical factor for vehicle manufacturers and this has become most apparent in car safety [1-4]. Manufacturers are now spending considerable resources on safety research. Government requirements on safety have compelled manufacturers to carry out considerable number of crash tests to validate the safety of their cars [6-7]. The data from these tests is important in the development of simulation models employing finite element (FE) software. Many companies predict crashworthiness using commercially available software such as PAMCARSH and LS-DYNA. These simulations are based on mathematical constitutive equations and hence any simulation created is only as representative as the constitutive equations used. This project has studied the reliability of the material models used by LS-DYNA. Material models selected for analysis are used extensively by impact simulations software and were namely: Power Law Plasticity and Cowper/Symonds. Piecewise Linear Plasticity was also selected because it is based on a true stress/strain and is expected that the simulation would be representative. The models were developed using Belytschko-Lin-Tsay shell elements and were compared with experimental tests employing uni-axial tension strips carried out on three materials – aluminium, high strength steel and mild steel. The tests were carried out using a DARTEC tensile testing machine (up to strain rate of 2.0s-1) at UCE in Birmingham. Testing for the higher strain rates (aluminium up to 269.1s-1, mild steel up to 460s-1, and high strength steel up to 456.9s-1), were carried out at The Royal Military College, Shrivenham using a ROSAND tester.

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Wu, Hong Xiao, Hao Zhe Xing, and Zhi Fang Yan. "Experimental Study and Numerical Simulation for Explosion and Phenomena of RC Slabs." Applied Mechanics and Materials 501-504 (January 2014): 1096–103. http://dx.doi.org/10.4028/www.scientific.net/amm.501-504.1096.

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The blast impact dynamic experiment of reinforced concrete rectangular plate with simply supported boundary conditions was performed using explosion pressure simulator. With 3-D FEM software LS-DYNA, the separate solid models of concrete and steel were established and 3-D FEM dynamic analysis of the experiment process was carried out. Compared calculation results to experiment results synthetically, the damage mechanism and failure characteristics of reinforced concrete plate under explosion impact loading condition were got and it is also verified that the H-J-C model can approximately simulate the concrete properties well under explosion impact loading condition.

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Du, Xue Jing, and Jin Peng Li. "Simulation of Pedestrian Colliding with Microbus Windshield." Key Engineering Materials 572 (September 2013): 574–77. http://dx.doi.org/10.4028/www.scientific.net/kem.572.574.

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In order to research the injury of pedestrian collided with microbus windshield, the finite element model of pedestrian and windshield are established based on the characteristics of pedestrian collision with microbus windshield in traffic accident to simulate the collision process by ANSYS/LS-DYNA. In the condition of different impact velocities, HIC, TTI and stress intensity of pedestrian are studied in simulation test. The results illustrate that with the impact velocitys increasing the original impact energy, stress intensity, acceleration, HIC, and TTI increase. Also, the collision time is prolonged. Collision in head, the head of pedestrian would suffer serious injury with more than 29 km/h impact velocity. The chest would suffer serious injury with more than 25 km/h impact velocity in condition of colliding on chest.

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Li, Qing Fen, Yan Jie Liu, Hai Dou Wang, and Sheng Yuan Yan. "Optimum Design and Numerical Simulation of Automotive Front Side-Door Impact Beam." Key Engineering Materials 452-453 (November 2010): 169–72. http://dx.doi.org/10.4028/www.scientific.net/kem.452-453.169.

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In the present work, the structure optimum design and simulation analysis of automobile side-door impact beam was carried out by using Finite Element (FE) method. The model of the side-door impact beam impacting with the rigid pole was set up according to the requirement of the Federal Motor Vehicle Safety Standards intensity test of side door (FMVSS214). The numerical simulations were carried out using the software LS-DYNA. Attention was focused upon finding an optimum cross- section shape of the beam in order to improve the energy absorption character. Several types of impact beams were studied and compared. Results show that the energy absorption characters of the beam improved obviously when square cross section with the wall slope 10° and a 9 mm long curled edge was adopted.

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LEE, JUNG-HEE, JAE-HOON KIM, JE-JUN LEE, YOUNG-SHIN LEE, SONG-HOE KOO, and SOON-IL MOON. "IMPACT SIMULATION AND ANALYSIS OF A GLASS CERAMIC SPHERICAL DOME." International Journal of Modern Physics B 22, no. 09n11 (April 30, 2008): 1483–88. http://dx.doi.org/10.1142/s0217979208046967.

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The dome port cover of a ramjet engine is used to seal off the ram air inlet during booster operation. When the ramjet engine undergoes the transition leading to ramjet operation phase, the port cover is fragmented by the ram pressure. Lately, the dome port cover has been made using a MACOR glass-filled ceramic that has high heat resistance and high compression strength, as well as low density. In this study, fracture simulations of a ceramic dome under shock pressure were performed through the finite element method, using the nonlinear code LS-DYNA. The material properties of the simulations were applied to the experimental results of a tensile test for the MACOR glass-filled ceramic. The simulation was carried out on the spherical dome model using various impact pulses. The fracture strength and fracture behavior mode were compared for each case. The type-A spherical dome fractured earlier than the other kinds of domes.

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Hou, Man Yi, Shu Lin Li, Yang Yi Jiang, and Shou An Li. "Simulation Study on Impact Damage of Aircraft Panel Structure under Stress." Key Engineering Materials 324-325 (November 2006): 391–94. http://dx.doi.org/10.4028/www.scientific.net/kem.324-325.391.

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Based on ANSYS/LS-DYNA code, the finite-element models were created to simulate the response of the aircraft panel structure impacted by high velocity projectile. The models proved to be effective through the comparison between the results of simulation and relative experiments. Then the impact process was simulated respectively considering the states of various types of stress in the panel. Through analyzing the simulation results, the influence of various stress states in the panel on impact response and damage mechanism was summed up. The conclusions indicated that the stress and particularly compression stress in aircraft panel structure can facilitate much more deformation and damage when the panel suffers high velocity impact.

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Deb, A., M. Raguraman, N. Gupta, and V. Madhu. "Numerical Simulation of Projectile Impact on Mild Steel Armour Plates using LS-DYNA: Part I: Validation." Defence Science Journal 58, no. 3 (May 24, 2008): 422–32. http://dx.doi.org/10.14429/dsj.58.1664.

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Raguraman, M., A. Deb, N. Gupta, and D. Kharat. "Numerical Simulation of Projectile Impact on Mild Steel Armour Platesusing LS-DYNA, Part II: Parametric Studies." Defence Science Journal 58, no. 4 (July 25, 2008): 573–81. http://dx.doi.org/10.14429/dsj.58.1679.

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