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Showing 1 to 20 of 64 for “"crashworthiness"”.
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School bus crashworthiness
Numerical simulation of automotive crashes play an important role in reducing the cost and time taken for predicting the results of a collision. Computer simulation of a vehicle requires that the vehicle structure be modeled in a finite element package by discretizing the geometry into a number of …
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Crashworthiness of Side Impact Beams
… the investigations carried out into the crashworthiness of side impact beams. Two specific beams were investigated: a commercially used steel beam and a prospective composite beam made from a glass fibre weave within a polypropylene matrix. The components were simply supported and were …
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Crashworthiness optimization of ultralight metal structures
This dissertation extends the use of the dynamic stiffness and transfer matrix methods in marine riser vibration. Marine risers possess a predominant chain topology. The transfer matrix method is appropriate for the analysis of such structures. Wave transmission and reflection matrices are …
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Crashworthiness analysis of ultralight metal structures
… the ultralight metal core and to determine the crashworthiness and the weight saving of structures composed of the two types of reinforced components, each of which may undergo axial crushing, bending, or twisting. Numerical expressions are developed to predict the crushing behavior of the new …
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Modelling the crashworthiness of specialist wheelchair devices
… techniques an informed judgement of the crashworthiness of the bespoke wheelchair designs could be attained. A series of computer models of occupied wheelchairs were created and validated against physical crash data performed on surrogate wheelchairs. These validated wheelchair computer …
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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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Analytical crashworthiness methods applied to composite structures
Thesis (Nav.E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
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Crashworthiness Multi-Material Topology Optimization for Minimum Mass
… and within these lightweight structures crashworthiness and occupant safety is continually important to all stakeholders. Industry standard lightweighting tools such as topology optimization (TO) and emerging techniques like multi-material topology optimization (MMTO) are effective for …
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A Data Mining Methodology for Vehicle Crashworthiness Design
… existing design approaches related to vehicle crashworthiness: that is, limited abilities to explore information from large datasets, which may hamper decision-making in the design processes.</p> <p>At the component level, two structural design approaches were implemented for detailed component …
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Optimal design of composite fuselage frames for crashworthiness
… of designing composite fuselage frames for crashworthiness. A key feature of any optimization strategy for increasing structural crashworthiness is a progressive failure analysis. Currently, the most widely used analysis methods for progressive failure of composite structures are considered …
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Structural Optimization of Thin Walled Tubular Structure for Crashworthiness
Crashworthiness design is gaining more importance in the automotive industry due to high competition and tight safety norms. Further there is a need for light weight structures in the automotive design. Structural optimization in last two decades have been widely explored to improve existing …
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Optimum crashworthiness design of grid-stiffened composite fuselage structures
… study, a tool was developed for incorporating crashworthiness into the preliminary design of grid-stiffened composite fuselage structures. The crash analysis of a fuselage structure was simplified through the development of a global-local procedure, which reduces the computational requirements …
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Front underride protection devices: design methodology for heavy vehicle crashworthiness
North American Heavy Vehicles contribute to a third of all road fatalities in Canada. Head on collisions are one of the most severe, as the mismatch of vehicle weight and sizing intensifies when a passenger vehicle is impacted. To improve crash safety, Front Underride Protection Devices (FUPDs) are …
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Development and Validation of Fluid-Structure Interaction in Aircraft Crashworthiness Studies
… Regulations require costly and time consuming crashworthiness testing to certify aircraft. These tests are only capable of a limited assessment of progressive damage and all crash configurations and scenarios cannot be physically evaluated. Advancements in technology have led to accurate and …
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Dynamic Mixed-Mode Fracture of Bonded Composite Joints for Automotive Crashworthiness
An experimental evaluation of the mixed-mode fracture behavior of bonded composite joints is presented. Commonly used experimental techniques for characterizing the mode I, mixed-mode I/II, mode II, and mode III fracture behavior have been employed for the purpose of developing a fracture envelope …
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Development of an innovative procedure to assess the crashworthiness of composite materials
L'abstract è presente nell'allegato / the abstract is in the attachment
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Material characterization of high-voltage lithium-ion battery models for crashworthiness analysis
… models developed by the MIT Impact and Crashworthiness Laboratory. Physical tests conducted in phase one of this study were compared to model simulations, which showed that the models make close approximations for material displacement, and are good predictors of internal short circuit.
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Experimental and numerical developments in predicting the crashworthiness of Formula One composite structures
… challenging to ensure a high level of crashworthiness. The commercial design tools currently available to F1 teams have not yet been properly assessed in terms of their ability to predict composite crushing in a reliable and cost-effective manner. There is also a general lack of …
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Enhancement of crashworthiness in car-truck collisions using damped under-ride guard and composite crush elements
… under direct and oblique impacts to enhance the crashworthiness of automobiles involved in collisions with heavy freight vehicles. The under-ride guard is analytically modeled incorporating non-linearities due to asymmetric damping, stiffness, clearance spring and kinematics of linkages, using …
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Crashworthiness capability of jute and glass fibre reinforced epoxy tubes under quasi-static loading condition for automotive application
… search the influence of utilizing jute fibre on crashworthiness parameters of composite materials. To improve the mechanical properties, jute fiber was hybridized with glass fiber. In this work, there are two main parts of study. Firstly, it is to investigate the effect of cross-sectional shapes, …
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