Browse Topic: Underride guards

Items (25)
In 2021, 412,432 road accidents were reported in India, resulting in 153,972 deaths and 384,448 injuries. India has the highest number of road fatalities, accounting for 11% of the global road fatalities. Therefore, it is important to explore the underlying causes of accidents on Indian roads. The objective of this study is to identify the factors inherent in accidents in India using clustering analysis based on self-organizing maps (SOM). It also attempts to recommend some countermeasures based on the identified factors. The study used Indian accident data collected by members of ICAT-ADAC (International Centre for Automotive Technology - Accident Data Analysis Centre) under the ICAT-RNTBCI joint project approved by the Ministry of Heavy Industries, Government of India. 210 cases were collected from the National Highway between Jaipur and Gurgaon and 239 cases from urban and semi-urban roads around Chennai were used for the analysis. Based on this study, the following results were
Vimalathithan, KulothunganRao K M, PraneshVallabhaneni, PratapnaiduSelvarathinam, VivekrajManoharan, JeyabharathPal, ChinmoyPadhy, SitikanthaJoshi, Madhusudan
A rear underrun protection device (RUPD) plays a fundamental role in reducing the risk of running a small car beneath the rear or the side of a heavy truck because of the difference in structure heights in the event of a vehicle collision. Even in cars with five-star safety ratings, crashing into a truck with poorly designed RUPD results in a passenger compartment intrusion (PCI) more than the maximum allowable limit as per the United States (US) American National Highway Traffic Safety Administration (NHTSA) standards Federal Motor Vehicle Safety Standard (FMVSS). In this article, mild steel was used to fabricate the new designs of RUPD. The design was analyzed using finite element (FE) analysis LS-DYNA software. Simulations of a Toyota Yaris 2010 and Ford Taurus 2001 were performed at a constant speed of 63 km/h at the time of impact. The ability to prevent severe injuries in a collision with the rear side of the truck was estimated to optimize the underrun design. The new design has
Albahash, Zeid FadelSharba, MohaimanHasan, Bahaa Aldin Abass
Rapid technological advancement of electric vehicles (EV) contributed to a significant increase of its market share worldwide. Among them battery technologies are key in extending the range of battery electric vehicles (BEV) and easing range anxiety for drivers. To further enhance the range for BEVs, continued downsizing of the battery system together with an increased energy density would be required. Cell to body (CTB) technology was release by BYD Auto in 2022 as its answer to the next generation of battery pack design and system level integration. The battery pack features a sandwich structure that consists of an upper cover, the company’s signature Blade Battery cells, and an underbody protection tray. The battery pack features a higher level of integration, with the volume utilization rate increasing to 66%. The integrated battery pack-body structure enhances its structural strength, with significant reductions in the intrusions across front, small-overlap and side pole impacts
Lian, YuboLing, HepingJiang, LongYi, BengangZhang, FengliLiu, JianjianSong, GanTang, Meng
Impacts between passenger vehicles and heavy vehicles are uniquely severe due to the aggressivity of the heavy vehicles; this is a function of the difference in their geometry and mass. Side crashes with heavy vehicles are a particularly severe crash type due to the mismatch in bumper/structure height that often results in underride and extensive intrusion of the passenger compartment. Underride occurs when a portion of one vehicle, usually the smaller vehicle, moves under another, rendering many of the passenger vehicle safety systems ineffective. Heavy vehicles in the US, including single-unit trucks, truck tractors, semi-trailers, and full trailers, are currently not required to have side underride protection devices. The NTSB, among other groups, has recommended that side underride performance standards be developed and that heavy vehicles be equipped with side underride protection systems that meet those standards. The work presented used virtual testing to evaluate the relative
Mattos, GarrettFriedman, KeithKiefer, AaronPonder, Perry
Although semitrailer underride collisions have a relatively high risk of injury, the significant body of data developed through crash testing has not been previously analyzed in a single study to be readily used by the accident reconstructionist. This study examined the publicly available IIHS semitrailer rear underride tests (N = 35). The crash data were classified as full-width (n = 9), 50% overlap (n = 11), and 30% overlap (n = 15). A 2010 Chevrolet Malibu impacted the rear underride guard of a stationary semitrailer at 35 mph. Several collision parameters, that is, vehicle longitudinal, lateral, and vertical delta-Vs, guard deformations, and occupant compartment intrusions were characterized and compared between different overlap groups. The coefficient of restitution and impact duration were also quantified and their relationship with different underride parameters was explored. The accuracy of the “black box” data for different overlap groups was evaluated. For N = 16 tests (n
Atarod, Mohammad
The objective of this study was to analyze the validity of airbag control module data in semi-trailer rear underride collisions. These impacts involve unusual collision dynamics, including long crash pulses and minimal bumper engagement [1]. For this study, publicly available data from 16 semi-trailer underride guard crash tests performed by the Insurance Institute for Highway Safety (IIHS) were used to form conclusions about the accuracy of General Motors airbag control module (ACM) delta-V (ΔV) data in a semi-trailer rear underride scenario. These tests all utilized a 2009 or 2010 Chevrolet Malibu impacting a stationary 48’ or 53’ semi-trailer at a speed of 35 mph. Nine tests were fully overlapped collisions, six were 30% overlapped, and one was 50% overlapped [2]. The IIHS test vehicles were equipped with calibrated 10000 Hz accelerometer units. Event Data Recorder (EDR) data imaged post-accident from the test vehicles were compared to the reference IIHS data. For each test, root
Famiglietti, NicholasHoang, RyanFatzinger, EdwardLanderville, Jon
This work describes the design and testing of side underride protection devices (SUPD) for tractor-trailers and straight trucks. Its goal is to reduce the incompatibility between small passenger cars and these large vehicles during side collisions. The purpose of these crash attenuating guards is to minimize occupant injury and passenger compartment intrusion. The methods presented utilize a regulation previously created and published for testing the effectiveness of these devices based on the principles of a force application device already implemented in the Canadian rear underride guard regulation. Topology and multi-objective optimization design processes are outlined using a proposed design road map to create the most feasible SUPD. The test vehicle in question is a 2010 Toyota Yaris which represents the 1100C class of vehicle from the Manual for Assessing Safety Hardware (MASH). Since the tractor-trailers and straight trucks utilize different structural components, separate
Galipeau-Belair, PatrickGhantae, SrikanthCritchley, DavidRamachandra, SarathyEL-Gindy, Moustafa
This SAE Recommended Practice establishes the recommended locations for the air brake and electrical connections for towing multiple trailers. It applies to all commercial trailers except drop frame and car haul types
Truck and Bus Brake Supply and Control Components Committee
This SAE Recommended Practice establishes the recommended locations for the air brake and electrical connections for towing multiple trailers. It applies to all commercial trailers except drop frame and car haul types
Truck and Bus Brake Supply and Control Components Committee
This SAE Recommended Practice establishes the recommended locations for the air brake and electrical connections for towing multiple trailers. It applies to all commercial trailers except drop frame and car haul types
Truck and Bus Electrical Systems Committee
This SAE Recommended Practice is intended to provide a uniform basis for evaluating the effectiveness of rear underride devices employed to reduce the likelihood of penetration of the passenger compartment of an impacting vehicle. The procedures described in this document provide means for determining the characteristics of a rear underride guard, taking into consideration the nature and direction of forces involved
Impact and Rollover Test Procedures Standards Committee
This SAE Recommended Practice is intended to provide a uniform basis for evaluating the effectiveness of rear underride devices employed to reduce the likelihood of penetration of the passenger compartment of an impacting vehicle. The procedures described in this report provide means for determining the characteristics of a rear underride guard, taking into consideration the nature and direction of forces involved
Impact and Rollover Test Procedures Standards Committee
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