Stress Analysis and Design Strategy for Lightweight Car Seat Frame

2004 ◽  
Vol 261-263 ◽  
pp. 597-602
Author(s):  
Hong Gun Kim
Keyword(s):  
Weight Reduction ◽  
Low Cost ◽  
Steel Frame ◽  
Frame Structure ◽  
Structural Safety ◽  
Element Analysis ◽  
Analysis And Design ◽  
Reduction Effect ◽  
Seat Frame ◽  
Actual Shape

A seat frame structure in automotive vehicles made of polymer matrix composite(PMC) with reinforced by X-shape steel frame was developed to obtain weight reduction at low cost. The frame structure was designed and analysed using finite element analysis(FEA) and was compared with experimental impact test to verify the structural safety after fabricated. The design model based on safety was analysed with appropriate boundary conditions and loading conditions. Each result was utilized to modify the actual shape to obtain a lighter, safer and stabler design. It was found that the substitution of PMC material reinforced by an X-shaped steel frame resulted in a weight reduction effect with equivalent strength, impact characteristics and fracture property.

Experimental Research and Finite Element Analysis on Behavior of Steel Frame with Semi-Rigid Connections

2010 ◽  
Vol 168-170 ◽  
pp. 553-558
Author(s):  
Feng Xia Li ◽  
Bu Xin
Keyword(s):  
Architectural Design ◽  
Plastic Hinge ◽  
Steel Frames ◽  
Seismic Energy ◽  
Internal Force ◽  
Steel Frame ◽  
Frame Structure ◽  
Element Analysis ◽  
Rigid Deformation ◽  
Steel Frame Structure

Most steel beam-column connections actually show semi-rigid deformation behavior that can contribute substantially to overall displacements of the structure and to the distribution of member forces. Steel frame structure with semi-rigid connections are becoming more and more popular due to their many advantages such as the better satisfaction with the flexible architectural design, low inclusive cost and environmental protect as well. So it is very necessary that studying the behavior of those steel frame under cyclic reversal loading. On the basics of connections experiments the experiment research on the lateral resistance system of steel frame structure has been completed. Two one-second scale, one-bay, two-story steel frames with semi-rigid connections under cyclic reversal loading. The seismic behavior of the steel frames with semi-rigid connections, including the failure pattern, occurrence order of plastic hinge, hysteretic property and energy dissipation, etc, was investigated in this paper. Some conclusions were obtained that by employing top-mounted and two web angles connections, the higher distortion occurred in the frames, and the internal force distributing of beams and columns was changed, and the ductility and the absorbs seismic energy capability of steel frames can be improved effectively.

The Design Review and Optimization of the Special-Shaped Steel Frame Structure

2010 ◽  
Vol 163-167 ◽  
pp. 600-604
Author(s):  
Ke Dong Tang ◽  
Jian Fu ◽  
Jun Dai ◽  
Peng Zhang ◽  
Rui Feng Yu
Keyword(s):  
Circulating Fluidized Bed ◽  
Reference Value ◽  
Steel Structure ◽  
Steel Frame ◽  
Frame Structure ◽  
Boiler Steel ◽  
Element Analysis ◽  
Structure Reliability ◽  
Calculation Results ◽  
Steel Frame Structure

According to the finite element analysis of a circulating fluidized bed boiler steel frame structure, the essay concludes to the calculation results of the main steel structure, moreover the structure and the composition of bars are adjusted and optimized which improve the safety of the structure reliability and reduce the volume of steel. All of the above contents have certain reference value on the similar structure.

scholarly journals Stochastic Finite Element Analysis of Composite Structures with Partially Restrained Connections under Earthquake Loads

2020 ◽  
Vol 9 (12) ◽  
pp. 147-152
Author(s):  
Özlem Çavdar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Composite Structures ◽  
Structural Safety ◽  
Stochastic Dynamic ◽  
Stochastic Finite Element ◽  
Element Analysis ◽  
Analysis And Design ◽  
Stochastic Finite Element Analysis ◽  
Partially Restrained

The stochastic analysis of composite structures with partially restrained (PR) connections under seismic loads present some interesting and challenging issues to practicing engineers. This paper proposes an efficient, robust, and accurate method for stochastic finite element analysis of concrete–steel composite structures allowing for PR connections. These are followed by suitable numerical example which indicates that employment of such a stochastic finite element analysis. The Kocaeli earthquake in 1999 is considered as a ground motion. The connections parameters and material properties are random variables. It is essential to properly consider the PR connections in the stochastic dynamic analysis and design of the steel-concrete composite structures since design forces change significantly. The assumption that the connections are rigid, which is routinely used in the application, is not proper. The effect of the variability connection stiffness on the composite structures responses is sufficiently important for consideration in structural safety.

scholarly journals Nonlinear Analysis of a Steel Frame Structure Exposed to Post-Earthquake Fire

Fire ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 73
Author(s):  
Alaa T. Alisawi ◽  
Philip E. F. Collins ◽  
Katherine A. Cashell
Keyword(s):  
Extreme Events ◽  
Human Life ◽  
Significant Risk ◽  
Element Model ◽  
Steel Frame ◽  
Frame Structure ◽  
Structural Safety ◽  
Nonlinear Behaviour ◽  
Design Codes ◽  
Accurate Analysis

The probability of extreme events such as an earthquake, fire or blast occurring during the lifetime of a structure is relatively low but these events can cause serious damage to the structure as well as to human life. Due to the significant consequences for occupant and structural safety, an accurate analysis of the response of structures exposed to these events is required for their design. Some extreme events may occur as a consequence of another hazard, for example, a fire may occur due to the failure of the electrical system of a structure following an earthquake. In such circumstances, the structure is subjected to a multi-hazard loading scenario. A post-earthquake fire (PEF) is one of the major multi-hazard events that is reasonably likely to occur but has been the subject of relatively little research in the available literature. In most international design codes, structures exposed to multi-hazards scenarios such as earthquakes, which are then followed by fires are only analysed and designed for as separate events, even though structures subjected to an earthquake may experience partial damage resulting in a more severe response to a subsequent fire. Most available analysis procedures and design codes do not address the association of the two hazards. Thus, the design of structures based on existing standards may contribute to a significant risk of structural failure. Indeed, a suitable method of analysis is required to investigate the behaviour of structures when exposed to sequential hazards. In this paper, a multi-hazard analysis approach is developed, which considers the damage caused to structures during and after an earthquake through a subsequent thermal analysis. A methodology is developed and employed to study the nonlinear behaviour of a steel framed structure under post-earthquake fire conditions. A three-dimensional nonlinear finite element model of an unprotected steel frame is developed and outlined.

scholarly journals Stress Analysis and Design Validation of Chute using DEM Software

2020 ◽  
pp. 68-72
Author(s):  
Sadige Akhil Prasad
Keyword(s):  
Bulk Material ◽  
Low Cost ◽  
Research Work ◽  
Discrete Element ◽  
Conveyor Belt ◽  
Screw Conveyor ◽  
Element Analysis ◽  
Analysis And Design ◽  
Individual Record ◽  
The Individual

The discrete element method (DEM) is attracting growing attention for the simulation of industrial Bulk solid flow; much of the earlier DEM modelling has considered two-dimensional (2D) flows and used circular particles. The DEM maintains the individual record (velocities, forces, etc.) of particles in flow and stress on equipment. This will enable the designer to know the problems in the design. Transfer chute is used in many industries to facilitate bulk material from one conveyor belt to another or for guide flow from a delivery point (feeder, screw conveyor) into a process or equipment (centrifuge, screener, etc.). Although the transfer chute itself may appear to be a low-cost part of the equipment train, it can easily become costly in maintenance due to plugging, abrasive wear, segregation, etc. The objective of this study is to analyse the stress distribution in a transfer chute when it is in use and to validate design is free from plugging. The modelling was done using the CREO PARAMETRIC software as per Industry standards. The Chute was modelled and simulated using the ROCKY DEM software. In the present research work, a discrete element analysis procedure is used in the ROCKY DEM simulation to predict the level of stress and velocities of particles.

Application of Two Damage Identification Methods Based on Sensitivity Analysis in Steel Structure

2014 ◽  
Vol 941-944 ◽  
pp. 2279-2283
Author(s):  
Yu Ying Wang ◽  
Wen Xiu Sun
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Damage Identification ◽  
Steel Structure ◽  
Research Area ◽  
Space Structure ◽  
Steel Frame ◽  
Frame Structure ◽  
Element Analysis ◽  
Identification Methods

Structure damage identification is a hot research area internationally in recent years. Two damage identification methods based on sensitivity analysis are concluded. A three-tier steel frame structure model is established through utilizing ANSYS10.0, the software of finite element analysis. Through modal analysis of finite element, the frequency and formation before and after damage are obtained. The position of damage of the model is fixed by applying two damage indexes. It is indicated from the results that these two methods are effective for damage identification of the space structure of steel frame.

scholarly journals Dynamic Performance Analysis of Steel Frame Structure under Seismic Action

2019 ◽  
Vol 2 (2) ◽  
pp. 1
Author(s):  
Xiaojun Yuan ◽  
Yanmu Qu ◽  
Jinlong Liu ◽  
Kailin Wei ◽  
Haifeng Zong
Keyword(s):  
Dynamic Performance ◽  
Time History ◽  
Steel Frame ◽  
Frame Structure ◽  
Seismic Action ◽  
Element Analysis ◽  
History Analysis ◽  
Dynamic Time ◽  
Steel Frame Structure ◽  
Dynamic Performance Analysis

In order to find out the dynamic characteristics of a steel frame structure project in the 8 degree (0.3g) area, the artificial wave, Taft wave and El Centro wave were input by using the finite element analysis software ANSYS. The dynamic time-history analysis of the structure shows the dynamic performance of the structure under the frequent earthquakes and rare earthquakes.

scholarly journals Design and Model Test of a Modularized Prefabricated Steel Frame Structure with Inclined Braces

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Xuechun Liu ◽  
Ailin Zhang ◽  
Jing Ma ◽  
Yongqiang Tan ◽  
Yu Bai
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Steel Structures ◽  
Steel Frame ◽  
Frame Structure ◽  
Element Analysis ◽  
High Rise ◽  
High Degree ◽  
Steel Frame Structure

Modularized prefabricated steel structures have become the preferred design in the industrialization of steel structures due to their advantages of fast construction speed, high degree of industrialization, low labour intensity, and more. Prefabricated steel structures have some engineering applications, but all are low-rise structures with few applications in the field of high-rise buildings. Using finite element analysis with line and solid elements, full-scale experiments were conducted to study the single-span frame, which is the core load-bearing part of a modularized prefabricated high-rise steel frame structure with inclined braces. The mechanical mechanisms, computation methods, and design formulas of truss girders were obtained by comparing the finite element and model experiments and building a theoretical and experimental basis for the compilation of design codes. The mechanical characteristics under design load, the deformation and stress state, the elastic-plastic law of development, and the yield failure mode and mechanism under horizontal ultimate load were also obtained. Based on theoretical analysis, finite element analysis, and experiments, the design method of this frame was summarized and incorporated into the design code.

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