The Method of Designing the Superstructure of the Car Body Based on the Requirements of Low-Speed Collisions

Aleksandrowicz²

2020

Transport Problems

A problem of car insurance frauds usually refers to reporting non-existent car crash circumstances to acquire the funds required for a car repair. However, the problem is not limited only to this kind of costs. Recently, numerous damage claims connected with spine trauma caused by rear-end collisions have been reported. These are the so-called whiplash injuries caused by a rear impact. Such damage is difficult to verify and hence a necessity to use more effective claim verification methods. An analysis of a collision in the SDC convention makes it possible to determine whether its circumstances were consistent with the reports of drivers involved in it. The aim of the analysis presented in this article has been to determine a possibility of using SRS-AIRBAG activation parameters to determine, with the SDC method, whether the circumstances of a collision reported were consistent with those responsible for a whiplash injury. The article provides an analysis of a series of rear-end collisions of vehicles moving in a column. The results have proven that the SDC procedure can be applied to verify the probability of a whiplash injury. With the above, this study is both academic and practical, and the results can provide benefits to vehicle collision researchers, experts, and students.

Section: Conditions For a Whiplash Injurymentioning

confidence: 99%

Verification of the Conditions for Whiplash-Type Injuries With the SDC Method Using the SRS-Airbag System Activation Parameters

Aleksandrowicz²

2020

Transport Problems

“…Next, an expert should enter the identified parameters and adjust stiffness of the simulated vehicle body, restitution coefficient and enter tasks that are not automatic. The crash test requirements for the low-speed vehicles colliding with a undeformed barrier, applied in the USA and in Europe have been discussed in another paper [28]. The problem related to simplifications of models was analysed with the use of a crash test of Audi A4 produced in 2011 with a mass of 1670 kg.…”

Section: Simplifications Of Collision Models In Sdc Dynamic Verificationmentioning

confidence: 99%

Collision Model Simplifications in the Dynamic Analysis With the SDC Method

2020

Transport Problems

The number of motor vehicles in the European Union (EU) is constantly increasing, which is causing an increase in the traffic volume. This, in turn, boosts the economic development of the EU member states. However, an increase in traffic volume leads to road collisions and accidents, which lead to high repair costs. Some accident victims report fake vehicle damage to extort money for repairs. There are criminal groups that stage accidents for this purpose; thus, these claims are very difficult to verify. Thus, it is not enough to verify the sustained damage only by comparing the geometric parameters of the impact traces. New, modern research methods with simulation programs need to be used in order to reconstruct the course of an accident. The SDC (Static Dynamic Characteristic method) provides the possibility of vehicle damage verification, according to this convention. However, simplified modelling with the use of simulation programs involves the necessity of identification of input parameters in order to reconstruct a collision and the vehicle's post-collision movement. If the input parameters are not correct, the simulation results will also be incorrect, which will have a direct impact on the parties involved in potential legal proceedings, both civil and criminal. This study deals with the identification of the impact parameters and sensitivity of the simulation results to input data. Impact verification with the SDC method shows both a knowledge enhancement and a practical value. They can be used by experts, expert witnesses, computer programmers, researchers and students.

Section: Introductionmentioning

confidence: 99%

“…In Europe, the USA, and Canada one must follow the requirements providing for the impacts of cars with a rigid barrier. Another study [2] discusses the vehicle superstructure designing method to develop the guidelines for the application of bumper beams and impact energy absorbers. The study also covered the head-on collision with rigid barriers.…”

Section: Introductionmentioning

confidence: 99%

Modeling Head-On Collisions: The Problem of Identifying Collision Parameters

2020

Applied Sciences

The analyses performed by the experts are crucial for the settlement of court disputes, and they have legal consequences for the parties to legal proceedings. The reliability of the simulation result is crucial. First, in article, an impact simulation was performed with the use of the program default data. Next, the impact parameters were identified from a crash test, and a simulation was presented. Due to the difficulties in obtaining the data identified, the experts usually take advantage of simplifications using only default data provided by the simulation program. This article includes the original conclusions on specific reasons of simplified collision modeling in Multi Body Systems (MBS) programs and provides specific directions of development of the V-SIM4 program used in the study to enhance the models applied. This manuscript indicates a direction for crash model development in MBS programs to consider a varied 3D body space zones stiffness related to the structure of the car body and the internal car elements instead of modeling the car body as a solid with an average stiffness. Such an approach would provide an alternative to Finite Element Method (FEM) convention modeling.