A Dynamic Component Rollover Crash Test System

2006 ◽  
Author(s):  
Robert W. McCoy ◽  
Clifford C. Chou ◽  
Roel Van de Velde
Keyword(s):  
Test System ◽  
Crash Test ◽  
Dynamic Component ◽  
Rollover Crash

Tractor-Trailer Rollover Crash Test

2007 ◽  
Author(s):  
James Chinni ◽  
Michael Miller ◽  
Norman Taylor ◽  
Shu Yang
Keyword(s):  
Crash Test ◽  
Rollover Crash

Rollover Crash Test Results: Steer-Induced Rollovers

2011 ◽  
Author(s):  
Don C. Stevens ◽  
Stephen Arndt ◽  
Leda Wayne ◽  
Mark Arndt ◽  
Robert Anderson ◽  
...  
Keyword(s):  
Crash Test ◽  
Test Results ◽  
Rollover Crash

Virtual Testing Applied to Door Latch Performance Evaluation

2016 ◽  
Author(s):  
Keith Friedman ◽  
Khanh Bui ◽  
John Hutchinson ◽  
Matthew Stephens
Keyword(s):  
Crash Test ◽  
Loading Conditions ◽  
Test Results ◽  
Passenger Vehicle ◽  
Virtual Testing ◽  
Side Door ◽  
Failure Loads ◽  
Vehicle Fleet ◽  
Rollover Crash ◽  
Minimum Force

Vehicle door latch minimum force capability testing presently utilizes uniaxial quasi-static loading conditions created toward the middle of the last century. Current technology enables more sophisticated virtual testing of a broad range of systems. Door latch failures have been observed in vehicles under a variety of conditions. Typically these conditions involve multiple axis loading conditions. The loading conditions presented during rollovers on passenger vehicle side door latches are not currently evaluated. Background on these conditions is reviewed. Rollover crash test results, rollover crashes and physical FMVSS 206 latch testing are reviewed. In this paper, the creation and validation of a passenger vehicle door latch model is described. The multi-axis loading conditions observed in virtual rollover testing at the latch location are characterized. These loads are then applied to the virtual testing of a latch in both the secondary and primary latch positions. The results are then compared with crash test and real world rollover results for the same latch. The results indicate that while a door latch in the secondary latch position may meet minimum existing uniaxial horizontal plane loading requirements, the incorporation of multi-axis loading conditions may result in failure of the latch to accomplish its intended purpose at loads substantially below the FMVSS 206 uniaxial failure loads. The findings suggest the need for reexamining the relevance of existing door latch testing practices in light of the prevalence of rollover impacts and other impact conditions in today’s vehicle fleet environment.

Test system, vehicle and occupant response repeatability evaluation in rollover crash tests: the deceleration rollover sled test

2011 ◽  
Vol 16 (6) ◽  
pp. 583-605 ◽  
Author(s):  
Jason R. Kerrigan ◽  
Nathaniel J. Dennis ◽  
Daniel P. Parent ◽  
Sergey Purtsezov ◽  
Joseph H. Ash ◽  
...  
Keyword(s):  
Test System ◽  
Sled Test ◽  
Rollover Crash ◽  
Crash Tests

Immunogold labeling of CMP-KDO synthetase produced by recombinant E. Coli cells

1987 ◽  
Vol 45 ◽  
pp. 924-925
Author(s):  
F. A. Durum ◽  
R. G. Goldman ◽  
T. J. Bolling ◽  
M. F. Miller
Keyword(s):  
Inclusion Bodies ◽  
Large Scale ◽  
Recombinant Dna ◽  
Test System ◽  
Cell Protein ◽  
Gram Negative Bacteria ◽  
Cytoplasmic Inclusions ◽  
Isolation And Purification ◽  
E Coli ◽  
Low Concentrations

CMP-KDO synthetase (CKS) is an enzyme which plays a key role in the synthesis of LPS, an outer membrane component unique to gram negative bacteria. CKS activates KDO to CMP-KDO for incorporation into LPS. The enzyme is normally present in low concentrations (0.02% of total cell protein) which makes it difficult to perform large scale isolation and purification. Recently, the gene for CKS from E. coli was cloned and various recombinant DNA constructs overproducing CKS several thousandfold (unpublished data) were derived. Interestingly, no cytoplasmic inclusions of overproduced CKS were observed by EM (Fig. 1) which is in contrast to other reports of large proteinaceous inclusion bodies in various overproducing recombinant strains. The present immunocytochemical study was undertaken to localize CKS in these cells.Immune labeling conditions were first optimized using a previously described cell-free test system. Briefly, this involves soaking small blocks of polymerized bovine serum albumin in purified CKS antigen and subjecting them to various fixation, embedding and immunochemical conditions.

Real Ear Sound Pressure Levels Developed by Three Portable Stereo System Earphones

1992 ◽  
Vol 1 (4) ◽  
pp. 52-55 ◽  
Author(s):  
Gail L. MacLean ◽  
Andrew Stuart ◽  
Robert Stenstrom
Keyword(s):  
High Frequency ◽  
Sound Pressure ◽  
Low Frequency ◽  
Test System ◽  
Output Frequency ◽  
Frequency Effects ◽  
Adult Men ◽  
Frequency Responses ◽  
Significant Difference ◽  
Sound Pressure Levels

Differences in real ear sound pressure levels (SPLs) with three portable stereo system (PSS) earphones (supraaural [Sony Model MDR-44], semiaural [Sony Model MDR-A15L], and insert [Sony Model MDR-E225]) were investigated. Twelve adult men served as subjects. Frequency response, high frequency average (HFA) output, peak output, peak output frequency, and overall RMS output for each PSS earphone were obtained with a probe tube microphone system (Fonix 6500 Hearing Aid Test System). Results indicated a significant difference in mean RMS outputs with nonsignificant differences in mean HFA outputs, peak outputs, and peak output frequencies among PSS earphones. Differences in mean overall RMS outputs were attributed to differences in low-frequency effects that were observed among the frequency responses of the three PSS earphones. It is suggested that one cannot assume equivalent real ear SPLs, with equivalent inputs, among different styles of PSS earphones.

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