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Showing 1 to 20 of 75 for “"LS-Dyna"”.
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LS-Dyna for Crashworthiness of Composite Structures
<p>Composite materials have excellent mechanical and thermal properties and are the materials of choice for many applications. Even though, the low inter-laminar mechanical properties and poor impact resistance of fiber reinforced composite materials has limited their use. The study of axial …
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Evaluation of Site Response Analysis for Vertical Ground Motions in LS-DYNA Using Geotechnical Downhole
… were selected for validation. Utilizing the LS-DYNA finite element analysis engine, the arrays were modeled as soil columns. The analysis were run under infield and outcrop boundary conditions, and under total and effective stress regimes. Initial Poisson's ratio was estimated using …
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Assessment of LS-DYNA and Underwater Shock Analysis (USA) Tools for Modeling Far-Field Underwater Explosion Effects on Ships
… the use of the numerical modeling tools LS-DYNA and USA in modeling general far-field underwater explosions (UNDEX) by modeling a three-dimensional box barge that is subjected to a far-field underwater explosion. Past UNDEX models using these tools have not been validated by experiment …
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Finite element modeling of energy-absorbing materials in blast-loaded structures
Energy absorbing materials such as foam or honeycomb are of interest in blast protection because of their ability to absorb energy through plastic deformation. They absorb a considerable amount of energy relative to their low density, and are investigated to determine if their energy absorbing …
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Pressure-impulse diagrams using finite element analysis for reinforced concrete columns subjected to blast loading
… concrete is one of the prime building materials widely used to construct protective structures. One of the purposes of this project is to study the non-linear response of reinforced concrete structures when subjected to impact and blast loading. The study is conducted at two levels: material …
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Finite Element Analysis and Experimental Validation of Reinforced Concrete Single-Mat Slabs Subjected to Blast Loads
… the effect of using various bond-slip models in studying the behavior of these twelve RC slabs subjected to blast loading. LS-DYNA®, a non-linear transient dynamic finite element analysis program, was used in this study. Finite element models for twelve slabs using the LS-DYNA® subjected to …
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Dynamic Analysis of CubeSat Impact on Lunar Surface
… vibration analysis, NASTRAN simulation, LS-DYNA simulation and a full scale drop test. The outcomes from this work are that the structure of EagleCam will survive the impact given that the shock isolation system chosen will mitigate some of the shock without exciting any of the CubeSat’s …
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Finite Element Analysis of a Golf Ball and Driver Head Impact: Understanding the Feasibility of an Acoustical Optimization
… such an impact. A validation of the FEA program LS-DYNA® was undertaken to ensure a proper solution was attained in the software analysis. An experimental and theoretical validation was performed that involved firing a golf ball at a titanium plate and comparing data from the impact to FEA …
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Evaluation of Elastic-Plastic and Damage Models for Ultra High Performance Concrete (UHPC)
… thesis, three elastic-plastic and damage models that were previously used to predict the mechanical properties of NSC were evaluated for use with HPC and UHPC. The models evaluated were the Concrete Smeared Crack (CSC) model and Concrete Damage Plasticity (CDP) model in ABAQUS, and the …
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Numerical analyses of long carbon fiber reinforced concrete panels exposed to dynamic loading
… behavior of concrete and decreases the spalls in either an impact or blast test. Among all of the fibers tested, Fiber Type B3 outperformed the other fibers, absorbing more energy during impact. Numerical simulation of a drop weight impact test was then performed on both welded wire …
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Alternate Load Paths and Retrofits for Long-span Truss Bridges under Sudden Member Loss and Blast Loads
… to “redundancy”. However, “redundancy”, also indicated as the post member failure behavior of long-span bridges is not well understood and is not explicitly considered, especially for long-span truss bridges. As one of the most famous collapse events that took place recently, collapse of …
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A Prediction of the Acoustical Output of a Golf Driver Head Using Finite Elements
A simulation was created using LS-DYNA® to determine the acoustical properties of a golf ball and golf driver head impact. LS-DYNA® has a coupled finite element analysis (FEA) and boundary element method (BEM) solver that uses the integral form of Helmholtz’s acoustic wave equation to deliver …
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Computational Design of Transparent Polymeric Laminates subjected to Low-velocity Impact
… algorithms and validated mathematical models of the problem. Here we have developed a mathematical model for analyzing the impact response of transparent laminates made of polymeric materials and implemented it in the finite element software LS-DYNA. Materials considered are …
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Studio di un sistema di ritenuta stradale con montanti e nastri in legno
… with wood posts and wood beams. Different models have been verified, each models is modeled and tested under the impact of a vehicle, as required by EN 1317-1 and EN 1317-2. The wood mechanical properties are function of moisture content and temperature. For each model have been made to vary …
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Impact Simulation and Analysis of Sandwich Structures
… computer simulations. A finite element program, LS-DYNA, is used to perform impact simulations and to analyze results. A number of experiments are conducted to compare practical results with simulations.</p>
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Structural Robustness of Long-span Cable-Supported Bridges
… such as floods, scours, hurricanes, etc., and dynamic loads such as earthquakes and vehicular impacts. Additionally, recent long-span cable-supported collapse examples show that many bridges suffered progressive collapse when local damage occurred, and they are highly vulnerable to severe …
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Improving Damage Tolerance of Composite Sandwich Structures Subjected to Low Velocity Impact Loading: Experimental and Numerical Analysis
… three different impact resistant core materials were fabricated and tested both experimentally and numerically. Neat CFRP and 2024-T3 aluminum alloy sheets were also investigated. Cores utilizing impact resistant D3O® were found to have very favorable weight specific energy absorbing …
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Enhancing Roll Form Bending Processes through Experimentation and Informed Predictive Analysis: A Strategic Approach to Optimize Tooling
… where metal strips pass through a series of rolls to achieve a specific cross-sectional profile. This technique is crucial in the automotive industry for producing high-strength, lightweight components with precision, consistency, and cost-effectiveness. This project aims to optimize Novelis’s …
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Finite Element Modeling of Delamination Damage in Carbon Fiber Laminates Subject to Low-Velocity Impact and Comparison with Experimental Impact Tests Using Nondestructive Vibrothermography Evaluation
… stiffness are required. While composite materials can provide high strength and stiffness-to-weight ratios, they are also more complicated to analyze due to their inhomogeneous nature. One important failure mode of composite structures is delamination. This failure mode is common when composite …
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A Design Study Using Simulation Techniques in Roll Form Production
… metal strips are fed through a sequence of rolls to achieve a specific cross-sectional profile. This method is vital in the automotive industry for producing high-strength, lightweight components with precision, consistency, and cost-efficiency. This project focuses on optimizing Novelis’s …
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