On Fatigue Testing of Passenger Car Body Construction

1971 ◽  
Author(s):  
Keiji Kobayashi ◽  
Keiji Yamaguchi ◽  
Takayuki Ikejiri
Keyword(s):  
Fatigue Testing ◽  
Passenger Car ◽  
Car Body ◽  
Body Construction

The next generation material for lightweight railway car body structures: Magnesium alloys

2016 ◽  
Vol 232 (1) ◽  
pp. 25-42 ◽  
Author(s):  
Woo Geun Lee ◽  
Jung-Seok Kim ◽  
Seung-Ju Sun ◽  
Jae-Yong Lim
Keyword(s):  
Friction Stir Welding ◽  
Magnesium Alloys ◽  
Structural Performance ◽  
Rolling Stock ◽  
Next Generation ◽  
Friction Stir ◽  
Car Body ◽  
Body Construction ◽  
Gradient Based ◽  
Low Stiffness

While magnesium alloys have the attractive attributes of low density, the application of the metal in transportation industries has been restricted by its low stiffness and strength. The aim of this study was to examine the possibility of lightweight railway car body construction using magnesium alloys from the structural and manufacturing perspectives. Extruded members, making up a car body, were designed employing a gradient-based optimization algorithm. And then, numerical simulations were conducted to confirm the structural performance of the newly designed car body. In addition, one of the designed members was extruded and joined with another via friction stir welding in order to verify its fabrication potential. The work demonstrated that, with just 85% of the weight of an aluminium car body currently in operation, a magnesium-based railway car body can be potentially constructed by extrusion followed by friction stir welding for the next generation rolling stocks; that is to say, the weight saving amount is 10% of the total bare frame weight, or 2% of its total rolling stock weight.

SIMULATION OF LOADING OF THE BODY OF A DOUBLE-STOREY PASSENGER CAR IN A FOCAL FIRE WITH SPECIFIED CHARACTERISTICS

2020 ◽  
Author(s):  
Dmitriy Antipin ◽  
Mihail Bulychev ◽  
Gennadiy Petrov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Carrying Capacity ◽  
Thermal Loading ◽  
The Body ◽  
Finite Element Scheme ◽  
Passenger Car ◽  
Element Scheme ◽  
Car Body ◽  
Element Method

A simplified method has been developed for assessing the loading of the load-bearing systems of passenger cars under thermal loading with a fire spot with limited properties. A system of simplifications for realizing a combustion spot is substantiated. A method for its implementation is proposed. The description of the object of research is given with the necessary thoroughness of presentation. A finite element scheme has been developed and adapted, taking into account the application of thermal loads in the system of an industrial software complex that implements the finite element method. Verification of the finite element scheme was carried out taking into account full-scale normative experiments. A conclusion is made about the possibility of the applicability of the finite element scheme for the study. Numerical experiments have been carried out to assess the carrying capacity of the body of a double-deck passenger car when it is exposed to a combustion center with known thermal parameters. The experiments were built and performed in a finite element method system. The results of simulations in the affected zone of the alleged fire were obtained for the conditional spot of its location. Comparison of the results with the static loading mode of the car body is considered. The analysis of the results obtained is carried out. A conclusion is given on the effect of a small localization fire on the carrying capacity of the car body. The proposed method is evaluated taking into account the possibility of further use

JUSTIFICATION OF TECHNIQUE FOR COMFORT AND SAFETY ANALYSIS AT PASSENGER TRANSPORTATION ON VIBRATION LOAD DECREASE OF PASSENGER CAR BODY

2021 ◽  
Vol 2021 (2) ◽  
pp. 44-50
Author(s):  
Dmitriy Antipin ◽  
Elena Lukashova ◽  
Pavel Zhirov
Keyword(s):  
Finite Element ◽  
Metal Structure ◽  
Comfort Level ◽  
Passenger Car ◽  
Body Vibration ◽  
Passenger Comfort ◽  
Vibration Load ◽  
Car Body ◽  
Passenger Transportation ◽  
The Impact

The purpose of the work is to increase comfort and safety of railway passenger transportation, at the expense of passenger car body vibration load decrease. The analysis of the investigations carried out and dedicated to the definition of rigidity property impact upon the level of passenger comfort and traffic safety has shown that the first mode of vertical bending impacts considerably upon car body dynamic behavior. The analysis of vibration load impact upon passenger car body was carried out in accordance with Dumitriu’s technique. As apposed to the investigations carried out earlier in the paper the data on car metal structure acceleration are obtained through the methods of mathematical modeling based on solid and finite element models. On the basis of the data obtained and natural running tests there was created and verified a particularized lamellar finite-element model of a car body with the aid of which there were obtained values of vertical and horizontal accelerations of a car body metal structure. The analysis of the results obtained has shown that within the frequency range of 8.9. – 20 Hz there are observed acceleration surges which are among the most sensitive ones in terms of the impact upon man and transport comfort support. At the frequencies obtained there was carried out a passenger comfort investigation with the aid of which it was defined that at the frequency of car body own bending oscillations of 8.9 Hz – a comfort index is above 4 units that shows a low comfort level. A frequency of 8.9 Hz corresponds to a vertical bending mode which is the most significant mode of car body deformation in terms of passenger comfort support. With regard to this in the works there was offered a number of efficient measures for strengthening car body structure bearing capacity with the goal of its bending rigidity increase which provides an installation of a supplementary bearing partition in the mid-section of a car body, and also the introduction of auxiliary longitudinal elements in a frame supporting design. For the effectiveness assessment of measures offered there was carried out re-investigation according to the technique described. As a result of the computation it was defined that the design measures offered allowed increasing a frequency value of own bending vibration of car body metal structure up to 11.7 Hz. The analysis of the results obtained allowed drawing a conclusion of the effectiveness of design solutions offered on car body vibration load decrease.

Car ‐ body construction and assembly

1982 ◽  
Vol 2 (2) ◽  
pp. 110-113
Author(s):  
S. Muller
Keyword(s):  
Car Body ◽  
Body Construction

Developments of Audi Space Frame Technology for Automotive Body Aluminum Construction

2020 ◽  
Vol 896 ◽  
pp. 127-132
Author(s):  
Gabriela Monica Pană
Keyword(s):  
Aluminum Alloys ◽  
Light Metal ◽  
The Body ◽  
Space Frame ◽  
Car Body ◽  
Automotive Body ◽  
Body Construction ◽  
Technological Developments ◽  
Frame Technology

With ASF (Audi Space Frame) technology, Audi has completely reinvented the body construction using aluminum as a material and a concept adapted to light metal. ASF technology has undergone developments that efficiently exploit the knowledge accumulated from the efficient use of aluminum alloys, the optimization of casting and profiling processes, to the most appropriate techniques for joining components. The paper analyzes the main technical and technological developments adopted by Audi in designing and manufacturing the aluminum space frame for the car body.

Data-based Process-Integrated 3D-Measurements of Magnesium Parts for Lightweight Car Body Construction

2021 ◽  
Author(s):  
Christian-Andreas Schumann ◽  
Jens Baum ◽  
Eric Forkel ◽  
Thomas Klein
Keyword(s):  
Car Body ◽  
3D Measurements ◽  
Body Construction
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