Lightweight Design of Patch Plate on Car-body B-pillar based on Side Impact Safety

2021 ◽  
Vol 69 (4) ◽  
pp. 35-42
Author(s):  
Wei Zhang ◽  
Keyword(s):  
Simulation Model ◽  
Lightweight Design ◽  
Side Impact ◽  
Original Material ◽  
Measurement Point ◽  
Position Measurement ◽  
Car Body ◽  
Design Scheme ◽  
Pillar Structure ◽  
Real Vehicle

The B-pillar of automobile needs to meet the requirements of vehicle strength and rigidity, and also consider the fuel economy of vehicle. Therefore, the design and development of B-pillar is a difficult point in the field of car body design and manufacturing. Based on the side impact regulations, the safety model ling and simulation analysis of the B-pillar of the vehicle was carried out to obtain the change law of the intrusion amount and the intrusion speed of the five key points in the whole process. According to the analysis results of side impact of B-pillar, a scheme to reduce the material thickness of B-pillar body and increase patch plate for lightweight design was proposed, and a comparative analysis of the safety of side impact was made. In view of the problem that the intrusion of B-pillar of a real vehicle model did not conform to the regulations, the design scheme of adding patch plate was proposed to improve the safety of side impact. According to the actual collision results, the simulation model was modified, and the design scheme was simulated and optimized. The reliability of the design scheme was verified by the real vehicle collision analysis. The results show that: in the side collision of B-pillar, the intrusion of D2 position measurement point is the largest, the intrusion velocity of D3 position measurement point is the largest, and the intrusion amount and intrusion speed of D5 position measurement point are the smallest. Patch plates are added to the inner side of adjacent area of D2 position measurement point. The welding point is welded with B-pillar structure, and other areas of B-pillar keep the same structure, so as to realize lightweight and effective improvement of safety. Under the condition of maintaining the original material and thickness of B-pillar, two patches with thickness of 2 mm and material of B340LA are added in the middle of B-pillar to improve the structural strength. The defect area is set at the wrinkle position of the original B-pillar to guide the deformation mode of the B-pillar. The relative deviation between simulation calculation and test intrusion is less than 20 %, and the car crash simulation model with improved B-pillar structure is more accurate. For this type of car, the optimization and improvement effect of B-pillar structure is ideal, which improves the passenger safety protection ability in side impact.

Lightweight Research of Automobile Dash Panel Based on Sound-Structure Sensitivity

2013 ◽  
Vol 681 ◽  
pp. 200-203 ◽  
Author(s):  
Lei Zhang ◽  
Zhi Yong Hao
Keyword(s):  
Sound Pressure ◽  
Lightweight Design ◽  
Sound Field ◽  
Coupling Model ◽  
Structure Sensitivity ◽  
Car Body ◽  
Field Coupling ◽  
Sound Structure ◽  
Dash Panel

In the research of the automobile front dash, the key of design is that acoustic need should be satisfied while losing the weight. In this paper, a structure-sound field coupling model of car body space is built. To fulfill the request, the dash panel is divided into several parts, and the sensitivity of thickness of each parts to the sound at the position of driver’s and co-pilot’s ears is calculated. Based on the sensitivity, the driver’s and the co-pilot’s parotic sound pressure is optimized while reducing the weight of front dash. The result proves that lightweight design is successful, which gives the reference to the design of the car body panels.

The Analysis and Improvement for Side Impact of Car Body Structure

2013 ◽  
Vol 456 ◽  
pp. 38-42
Author(s):  
Ai Hong Gong ◽  
Ming Mao Hu
Keyword(s):  
Side Impact ◽  
Fe Model ◽  
Body Structure ◽  
Impact Performance ◽  
Car Body ◽  
Euro Ncap ◽  
Virtual Test ◽  
Structure Improvement ◽  
Moving Deformable Barrier ◽  
The Impact

Based on the finite element (FE) model and Moving Deformable barrier (MDB) model of a car side impact, the virtual test of the side impact was conducted with HYPERWORK software according to Euro-NCAP regulation. Then the impact performance was evaluated in both deformation and response curve of the car body, and the problem of the crashworthiness in designing the side structure was analyzed. Finally, the structure improvement with CATIA for the side crashworthiness was proposed. Keywords: CAE analyze, Side impact, Improvement

Lightweight Design of Car Body Structure

2013 ◽  
Vol 7 (1) ◽  
pp. 105-110
Author(s):  
Guo-sheng Zhang ◽  
Jing-hong Li ◽  
Hui-qi Shi ◽  
Wei-liang Dai
Keyword(s):  
Lightweight Design ◽  
Body Structure ◽  
Car Body ◽  
Car Body Structure

scholarly journals Fuel Efficiency by Coasting in the Vehicle

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Payman Shakouri ◽  
Andrzej Ordys ◽  
Paul Darnell ◽  
Peter Kavanagh
Keyword(s):  
Simulation Model ◽  
Fuel Economy ◽  
Engine Speed ◽  
Fuel Efficiency ◽  
Experimental Tests ◽  
Standard Practice ◽  
Industry Standard ◽  
Time Period ◽  
Real Vehicle

This paper investigates the possibility of improving the fuel efficiency by decreasing the engine speed during the coasting phase of the vehicle. The proposed approach is stimulated by the fact that the engine losses increase with the engine speed. If the engine speed is retained low, the engine losses will be reduced and subsequently the tractive torque will be increased, enabling the vehicle to remain moving for longer duration while coasting. By increasing the time period of the coasting the fuel efficiency can be increased, especially travelling downhill, since it can benefit from the kinematic energy stored in the vehicle to continue coasting for a longer duration. It is already industry standard practice to cut fuel during coasting and refuel at low engine speed. The substantial difference proposed in this paper is the controlled reduction of engine speed during this phase and thus reduction in the engine losses, resulting in improved fuel economy. The simulation model is tested and the results illustrating an improvement to the fuel efficiency through the proposed method are presented. Some results of the experimental tests with a real vehicle through the proposed strategy are also presented in the paper.

Analysis of Static Bending Rigidity with Car Body Lightweight Design for Certain Model of Electric Vehicle

2014 ◽  
Vol 552 ◽  
pp. 24-28
Author(s):  
Zhen Yu Xu
Keyword(s):  
Finite Element ◽  
Electric Vehicle ◽  
Steel Plate ◽  
Lightweight Design ◽  
High Strength ◽  
Element Model ◽  
Bending Rigidity ◽  
Car Body ◽  
Before And After ◽  
The Finite Element Model

Taking a certain urban model of electric vehicle as example, DC04 steel plate has replaced with high-strength steel plate BH340 for some parts of the car body on the purpose of reducing the car weight; at the same time, reduced the thickness of steel plate at the replacing spots, and then set the finite element model for the car body to compare its bending rigidities before and after replacement. On the premise of satisfying car body’s bending rigidity, it could make car body to reduce a weight of 23.2KG to satisfy the requirement for lightweight design.

Simulation of Wheel Slide Protection System for Railway Vehicles

2013 ◽  
Vol 765-767 ◽  
pp. 374-377
Author(s):  
Zong Ming Wang ◽  
Jian Yong Zuo
Keyword(s):  
Simulation Model ◽  
Mechanical Model ◽  
Closed Loop ◽  
Control Model ◽  
Protection System ◽  
System Model ◽  
Closed Loop System ◽  
Laboratory Bench ◽  
And Control ◽  
Real Vehicle

Computer simulation was used to study WSP (Wheel Slide Protection) system in this paper. The model of WSP system was built. Simulation model can avoid real vehicle tests or laboratory bench which will cost a lot of time and expenses. The WSP system model was composed of pneumatic model, mechanical model and control model. Three models were connected with each other and formed a closed loop system. The result shows that the simulation model has most characteristics of WSP system. The model can be used in the study of WSP system instead of the real system.

Tube Press Hardening for Lightweight Design

2011 ◽  
Author(s):  
Reimund Neugebauer ◽  
Frank Schieck ◽  
Markus Werner
Keyword(s):  
Lightweight Design ◽  
Innovative Technology ◽  
Material Strength ◽  
Original Material ◽  
Heat Management ◽  
Forming Process ◽  
Press Hardening ◽  
Forming Technology ◽  
Process Reliability ◽  
The Media

Press hardening is an innovative technology being applied to meet the growing demands for both lightweight and crash performance qualities. To further increase the lightweight potential, closed profiles are being used. As a result, a method has been developed at the Fraunhofer Institute for Machine Tools and Forming Technology IWU which allows the integration of press hardening of tubes and closed profiles into the media-based forming process. Using this press hardening technology, the original material strength of 500 MPa can be increased to between 1200 and 1900 MPa, depending on the chosen material. The engineering of tube press hardening is more complex than other forming processes, specifically the time dependence in combination with heat management makes it difficult. Therefore the use of FEA is indispensible when dealing with aspects such as heat treatment, the forming process itself, the cooling caused by the gaseous forming media and the general heat management of the tooling. To control and improve the process and therefore the part quality and process reliability, all these factors and their dependencies have to be taken into account. In addition to 22MnB5, other manganese-boron alloyed steels and different heating strategies have been tested. Based on these experiments the process capability was successfully proven and technological limits were obtained. Current investigations are focused on realizing tailored properties thus creating areas with varied strength and ductility in a single part.

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