- Details
- Category: Motor industry

LS-DYNA is used in automobile manufacturing to carry out crash tests [1]. Leading automobile factories use this program to carry out calculations relating to the cars they produce.

Various types of dummies, for example, Hybrid III dummy model, can be used for modeling of crashes (crash tests) [2]. Such models of dummies are used in many crash tests. The analysis procedure is based on the fact that a model should be characterized by fundamental mechanical, geometrical and other properties of a real object.

Another application of LS-DYNA is its use as a tool in the design of airbags [3]. In this case the Euler approach is used. In this program the whole process of using the airbag, from the beginning of its deployment to the interaction with dummies, can be modeled. The process of filling with gas, airbag deployment and closing, and the behavior of the dummy can be modeled. LS-DYNA can be used for the calculation of the technological process and constraints with the help of individual differences between the approaches.

With the help of the data obtained road transport and its security systems can develop even faster. Modeling can show what to do to reduce damage to the driver and the passenger in case of an accident.

Another area of program application in the automotive industry relates to heat transfer processes when, for example, a disk brake is heated [4]. LS-DYNA program can solve both routine and short-term heat transfer problems, both in two-dimensional and three-dimensional forms. The heat transfer process can also be modeled using other program features, for example, connection of heat and stress and connection of heat and fluid. When the brake disk of a vehicle wheel stops, the disk was heated by friction during braking. In particular, the process of disk warping and reasons contributing to this were of interest. Modelling in LS-DYNA showed that the main reason is uneven heating of the disk due to ribs acting as a heat sink.

Another relatively new application of LS-DYNA in motor-vehicle construction is its use for the purposes of statistical calculations with the help of implicit integration schemes, for example, for the calculation of the vehicle suspension system [5]. In particular, the program can be used to calculate strength, for example, under extreme loads of the vehicle, when calculating the durability, during braking and making turns, when calculating vehicle components and many other calculations.

Output data on energy characteristics, stresses and strains, forces, displacements, etc. can be used as output parameters. It is noted that the implicit solver of LS-DYNA works several times faster than the explicit one, when such problems are solved.

LS-DYNA can be used as a virtual test system for various vehicles [6]. This application is based on non-linear contact for the purpose of assessing the total road loads and predicting the structural durability of components with the road and tires. Earlier such studies were impossible because of the long computational analysis. LS-DYNA allows solving issues related to the prediction of durability of the vehicle body and frame, suspension system and other vehicle elements influenced by these forces. The program can predict stresses and strains over time, fatigue life and other characteristics of vehicle elements.

1. The performance of 10-million element car model by MPP version of LS-DYNA of fujitsu primepower. Mitsuhiro Makino. 10 th International LS-DYNA user conference .

2. LSTC / NCAC Dummy Model Development Pradeep Mohan, Chung-Kyu Park, Dhafer Marzougui, Cing-Dao Kan, Sarba Guha, Christoph Maurath, Dilip Bhalsod. 11 th 11 International LS-DYNA Users Conference .

3. OOP-Simulation - A tool to design airbags? Current capabilities in numerical simulation. Benno Beesten, Andreas Hirth, Robert Reilink, Rolf Remensperger, Doris Rieger, Gunther Seer.

4. Heat Transfer in LS-DYNA. Arthur B. Shapiro. 5th European LS-DYNA Users Conference.

5. Babulin, A. Yu., the Use of LS - DYNA for calculation of the elements of the car // Innovative trends in the strength calculations: Strela (4 Oct. - 8 Oct.). - Kyshtym.

6. 18 Wheel Truck Dynamic and Durability Analysis using Virtual Proving Ground. Ramesh Edara, Shan Shih, Nasser Tamini, Tim Palmer, Arthur Tang. 10th International LS-DYNA Users Conference.

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