A kind of impact bending test device and test method of automobile front longitudinal beam assembly

Abstract

The invention relates to an impact bending resistance test device for a car front longitudinal beam assembly and a test method. The device comprises a test driving trolley, wherein a collision plate is welded and fixed at the front end of the test driving trolley, the front longitudinal beam assembly is mounted on the collision plate through front longitudinal beam mounting plates, a longitudinal beam front end restraining plate is fixed on the front end surface of the front longitudinal beam assembly, and the front longitudinal beam assembly comprises left and right parts which are symmetrically arranged about the longitudinal mid-plane of the test driving trolley; during the test, the test driving trolley collides with a barrier in the front at a certain speed, and sensors arranged on the test driving trolley and the rigid barrier in the front acquire dynamic data to test the impact bending resistance of the front longitudinal beam assembly. With the adoption of the device and the method, on the premise that the front longitudinal beam assembly impact test reliability is guaranteed, the front longitudinal beam assembly bending resistance test is realized at a low cost, and the increasingly severe challenge of reduction of car firewall intrusion, guarantee of survival space of passengers and reduction of injuries to the passengers in the current front collision regulation as well as NCAP standards at home and abroad is coped with.

Description

technical field [0001] The invention relates to a test device for automobile safety, in particular to a test structure and a test method for impact bending resistance of a front longitudinal beam assembly. Background technique [0002] With the rapid growth of urban and rural residents' car ownership, road traffic accidents have become a serious public hazard that threatens human life all over the world. According to WHO analysis and prediction: by 2020, road traffic accidents will become the third largest personal threat in the world after cardiovascular disease and depression. For this reason, all developed countries in the world have made mandatory requirements for automobile collision safety , established their respective regulatory systems, and successively implemented the New Car Assessment System (NCAP: New CarAssessment Program), aiming to further promote the improvement of automobile collision safety. [0003] Relevant statistics show that the casualties caused by ...

AI Technical Summary

Problems solved by technology

This type of test device is suitable for the subsystem composed of the front bumper, the energy-absorbing box and the "straight" longitudinal beam front structure. Reliability issues: When the structure is subjected to a collision impact load from the front, cracks will initiate at the welding position between the rear end of the front longitudinal beam and the mounting plate of the front longitudinal beam, resulting in an open-type (Type I) fracture failure, resulting in test failure

This method is suitable for the bending resistance of heavy-duty vehicles in the direction of gravity, but it cannot be used to test the bending resistance of the front longitudinal beam assembly of the vehicle against the impact of frontal collision

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