Brian Darr, P.E., tire expert, was retained to conduct a tire failure analysis. A precursor to total tire disintegration from severe underinflation can be observed in a zipper failure. Tire should be removed at the following condition whichever comes first across the tread; i) When the wear level reaches the bottom of any groove at one point or up to 1/8 of the circumference ii)einforcing fabric (bias) or aramid cord protector (radial) is exposed. It provides an overview of factors Operators and maintenance groups in an effort to reduce the likelihood of recurrence. Found inside – Page 142The plaintiffs rested their case in significant part upon deposition testimony provided by an expert in tire failure analysis, Dennis Carlson, Jr., who intended to testify in support of their conclusion. Carlson's depositions relied ... He applies his expertise to the investigation of vehicle crash incidents, with a particular focus on those involving failed or damaged tires. The failure occurred several minutes after the tire was inflated. View via Publisher. (2013) 13:684-688 DOI 10.1007/s11668-013-9750-x CASE HIST ORY—PEER-REVIEWED • • • • Souvik Das Prashant Koli . 3201 Ridgelake Drive | Metairie, LA 70002 The failure forced the recall of 6.5 million ATX, ATX II and Wilderness AT tires most commonly found on the Ford Explorer, the best selling sport/utility vehicle, and the model linked with most of . The design and manufacture stages of a tire, as well as proper maintenance and care, may all factor into an instance of tire failure. 2. The professionals found through this page may advise regarding tire mechanical defects, tread separations, and tire failure. Section 6 is devoted to statistical analysis focused on estimation of tire-pressure-related parameters, as well as test certain hypotheses that are relevant to tire pressure maintenance issue. SAE publishes book on tire failure analysis. Date 2908 or the 29th week of 2008 Thanks John This would have increased heat and deflection on the inboard side of the left front steer tire. We can determine if a tire failed due to a . Example computations are presented that indicate the relative importance of a selection of variables on crack tip driving . This was an installation defect (see table below). U.S. Forensic conducts tire failure analysis. Our tire experts provide clients with the information that they need to make a sound decision regarding a case or claim. Mathematical Analysis of Tire Delamination & Rupture Failures. has the capability to do non destructive tests on all types of tires including automotive, racing, aircraft and truck up to 60" dia. If it can be done so safely (i.e. Tire failure occurs when there is a defect or weakness in the material or design of a tire. A tire failure analysis can be done by an expert witness or consultant, and the result may be a deciding factor in a . Found inside – Page 295analysis. method. 1. INTRODUCTION. Bitumen production from oil sands is a viable economic venture given the ... Long haul distances, in excess of economic limits, cause the tire heat index rating to be exceeded, resulting in a net heat ... Thankfully the occupants were unharmed, but the tire failure led to more than $150,000 in damages. A few months after this rotation, the owner was on a trip in Arizona when the left front tire blew out. A real fatigue test stand with a mounted tire is shown in Figure 2. Brian was a pleasure to work with, and following his work in this case, I have already recommended him to a colleague who was looking for an expert in a tire case. Our tire experts provide clients with the information that they need to make a sound decision regarding a case or claim. Tire failure expert witnesses have a background in the automotive industry, mechanical engineering, materials science, vehicle design and engineering, accident reconstruction, failure analysis, and other related disciplines. Date 2908 or the 29th week of 2008 3rd tire failure on 7-17-2012: 11,770 miles, DOT mfd. Found inside – Page 263The plaintiffs rested their case in significant part upon deposition testimony provided by an expert in tire failure analysis, Dennis Carlson, Jr., who intended to testify in support of their conclusion. Carlson's depositions relied ... Tire Failure Analysis. 2. If you were involved in a traffic accident and believe that tire failure may have played a role, call the Coral Gables tire defect attorneys at Halpern, Santos & Pinkert today to schedule a free consultation and conduct an investigation of the accident and the tire. Although failure analysis is typically considered at the end of serviceability of a tire, Smithers can also . U.S. Forensicâs laboratory is equipped with x-ray machines that can be used for non-destructive testing of tires and other components. WHEEL-CHECK®, CUSTOM COLORS: Found inside – Page 46Inspect the complete tire prior to determining the cause of failure (i.e., often a separation in a tire sidewall may be ... Council (TMC) of the American Trucking Associations, from page X of TMC's Radial Tire Conditions Analysis Guide. No U.S. tire manufacturer currently provides a written warning about age-induced tire failure, so cases involving failures of aged tires will be "no warning" marketing-defect cases. Failure analysis is simply recording the cause of a tire being pulled from service. Tire can be mounted OSS out or in, and as left or right tire. Thankfully the occupants were unharmed, but the tire failure led to more than $150,000 in damages. The TBR tires 11.00R20 and 12.00R20 are the test tire. and Preven. Tire Durability Test. From January 1989 to December 1991, fatal accidents resulting from wheel separations totalled 24, compared to 12,300 medium/heavy truck fatal accidents for the same period. Calculations regarding tire failure stresses during tire failure scenarios, as well as during normal operation, are made. In addition to tire failure analysis, our experts can evaluate automotive systems to determine if failure or fire occurred due to a manufacturing defect, service or repair, lack of maintenance, or operator error. by car phone) warn the truck driver or authorities of the condition. If you do see such a condition increase your distance from the suspect vehicle. Brian Darr, P.E., tire expert, was retained to conduct a tire failure analysis. Separations of such massive wheel assemblies from moving vehicles often cause extensive damage to vehicles and/or structures entering into their path. Tire Inspections X On December 19, 2000, Bridgestone/Firestone issued a report, its Root Cause Analysis addressing the tire failure/tread separation problems, citing (1) faulty tire design, (2) manufacturing processes at its Decatur, Illinois plant, (3) lower inflation pressure recommended by Ford (triggered by design problems/roll over propensities of the Explorer), (4) and, of course, blaming customers for . (504) 831-7001 Office | (888) 436-3092 Fax Found inside – Page 73The four most common defenses in exploding tire lawsuits , and their weaknesses are listed . The article stresses the need for an informed logical failure analysis , and a rational technical explanation that “ educates " and convinces ... As a larger variety of materials are introduced into the tire manufacturing . Engineering. Written by Thomas R. Giapponi, president of TRGtech Tire Consulting L.L.C., "Tire Forensic Investigation: Analyzing Tire . He applies his expertise to the investigation of vehicle crash incidents, with a particular focus on those involving failed or damaged tires. Find tire expert witnesses and consultants by clicking on one of the following links. Regarding the failure of bias truck tires due to the shoulder separation, the factors contributing to the cause of this mode of failure are examined. Found inside – Page 50Aircraft Tire Blowout Ruptures Hydraulic Line Fragments Hit Hydraulic Line Aircraft Tire Blowout Tire Fragments Strike Hydraulic Line Hydraulic Line Ruptured P = 0.15 P = 0.60 Fig. 6.2 INHIBIT gate. The undeveloped event “Aircraft tire ... Found inside – Page 220See also Stages of failure analysis analytical techniques, 186–188 benefits of, 71 foregoing, 134 nine steps of, 91 on-site, ... 189 Firestone tire failure 16–18, 26, 82, 83(F), 84–87 Flashlight 100(T), 102 Forms 100(T), 104–105, 107. We want to thank you for your work in this case as it was instrumental in countering certain arguments made by these Defendants. Found inside – Page 172Kumho Tire moved the District Court to exclude Carlson's testimony on the ground that his methodology failed Rule 702's ... of the reliability of “the component of Carlson's tire failure analysis which most concerned the Court, namely, ... Tire Failure Analysis Overview In the Southwest especially, due to high temperature conditions, many accidents result from premature tire failure. Dr. Tarek Omar, is a Mechanical and Structural Engineering expert with over 24 years of leading edge experience in the areas of accident investigation and reconstruction, highway safety, automotive / vehicular engineering, security barriers and structural analysis. Custom colors and sizes are available upon special request. Found inside – Page 36191 The plaintiffs based much of their case on the testimony of Dennis Carlson , Jr. Mr. Carlson worked for a litigation - consulting firm that performs tire failure analysis . Mr. Carlson had a bachelor's and master's degree in ... Example computations are presented that indicate the relative importance of a selection of variables on crack tip driving . The problem of wheel fixing failure occurs across a range of vehicle types and manufacturers but is predominantly a problem relating to heavy goods vehicles. We analyze both tire failures that cause vehicle crashes as well as failures that occur during tire handling and service. Tire inspection should be done on a monthly basis, checking the air pressure, tread depth, and overall condition of the tire. Found inside – Page 122Identifiers : Evaluation , Failure analysis , Alliance tires . Descriptors : ( * Tires , Tests ) , ( * Safety , Tires ) , Vehicle chassis components , Visual inspection , Environmental tests , Loading ( Mechanics ) , Failure ( Mechanics ) ... Failure Analysis Methods What, Why and How MEEG 466 - Special Topics in Design Jim Glancey Spring, 2006. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): This report is an assessment of what is presently understood about the recent Firestone ATX and AT tire problems. Tire Durability Test. An Epidemiologic Analysis of Causal Factors in Tire Failure-Related Traffic Crashes. TRUCK TIRE/ WHEEL SEPARATIONS Defensive driving techniques primarily centre on keeping a safe operating "halo" void of other motor vehicles (especially trucks) around your vehicle. Our experts are mechanical engineers with training and experience to determine if the tire failure was due to a manufacturing defect, improper maintenance, or other contributing factor. You can get a sense of the magnitude of the problem just by looking at the amount of tire tread "samples" littering the roadway shoulders in your area. Failure Analysis Methods •Every product or process has modes of . The tire test conditions are usually harsh conditions such that the applied load is twice the rated . It is less of a realistic option during high traffic density conditions. The installer used the proper lubricant, had checked the rim . Found inside – Page 146But the court found insufficient indications of the reliability of “ the component of Carlson's tire failure analysis which most concerned the Court , namely , the methodology employed by the expert in analyzing the data obtained in the ... Visits to tire factories in Indonesia, Korea, Europe, and the United States. An Epidemiologic Analysis of Causal Factors in Tire Failure-Related Traffic Crashes. sae.org. A report customized to the needs of . I have been using them for a couple of years and have had excellent results and wanted to reinforce and recommend an excellent vendorâ¦. In this study, the tire durability test was carried out using the tire fatigue durability tester. This "halo" may be achievable while driving in low to moderate traffic density conditions. Government data shows that while front as well as rear tires are subject to failure, rear tire failures caused all but 2 of the 131 rollovers reported to . The cause of traffic crashes that follow a sudden tire failure is a point of contention in the literature. We examine the characteristics, properties and potential idealized delamination failure modes of tires in this work. Found insideHe admitted that the vast amount of his experience in failure analysis has been related to products other than tires. He had tested a tire only once, to determine the presence of foreign substances. None of the texts upon which he ... Tire failure analysis with SEM-EDS. Tire Failure Analysis Course Details. 2018-01-5031. screw sticking out the sidewall makes it pretty obvious why the tire is out of service. In this study, the tire durability test was carried out using the tire fatigue durability tester. Analysis Tire bead failure . WHEEL-CHECK®, THE LOOSE WHEEL-NUT INDICATOR. Toll Free Number – Mountain & Pacific Time Zones: (888) 873-0771 Through analysis by the experts, including two of the foremost tire failure analysts in the country, Dick Baumgardner and Dennis Carlson, and review of Firestone's internal documents and the testimony of Firestone employees, Mr. Kaster assisted litigants in determining the root cause for the Firestone tread separation failures. 2018;2(1): 32-37. "In all cases, failure rates for the recalled tires are fractions of a percent and thus determining a single cause for the failures is an unrealistic expectation," said Sanjay Govindjee, associate . service condition. Failure analysis expert witnesses and consultants on this page may form expert opinions, draft expert witness reports . Found inside – Page 150The plaintiffs' expert in tire failure analysis proposed to testify that a defect in the tire's manufacture or design caused the blowout. The trial court applied the Daubert analysis to the proffered testimony, even though the testimony ... This review of Rubber Product Failure outlines and illustrates the common causes of failure, while addressing ways of avoiding it. For instance, in some cases reports did not distinguish between wheel separation and tire failure accidents. Test procedure and methods2.1. Based on the author's 30 years of experience in the tire industry, the book looks at the methodical, physical, visual and tactile examination of the failed tire and identifies the various failure modes for passenger car and light truck ... Our accident reconstructionists are available to assist in determining how the accident occurred, downloading crash data, and determining if the tire failure contributed to the accident. Photo 4 shows a circumferential break in the mid to upper sidewall, exposing an even line . U.S. Forensic conducts tire failure analysis. Analysis of tire fragments found on the roadside revealed that the two dominant reasons for their condition were 39% from road hazards and 30% due to excessive heat. Found insideAmong other things, the expert could not say whether the tire had traveled more than 10, or 20, or 30, or 40, or 50 thousand ... Respondents now argue to us, as they did to the District Court, that a method of tire failure analysis that ... It can also occur when dual axel tires are overloaded, or there is not enough clearance between the two tires of the assembly. 2017-01-1509. © All Rights Reserved. Found insideThe most significant challenge for failure analysis is the assignment of the root cause of a failure. ... Once the tires are in use, there is a race to see which root cause is guilty of a failure in a particular tire. This is particularly important in cases where a manufacturerâs defect may have caused a tire tread separation or failure. U.S. Forensic can determine the cause and origin of a blow out, tread separation, or other damage. Found inside – Page 122Identifiers : Evaluation , Failure analysis , Alliance tires . Descriptors : ( * Tires , Tests ) , ( * Safety , Tires ) , Vehicle chassis components , Visual inspection , Environmental tests , Loading ( Mechanics ) , Failure ( Mechanics ) ... RECOMMENDATION: However, many tire failures are a result of improper maintenance on the part of the insured and may . They reported that wheel separation accidents constituted about 0.3 percent of all truck accidents. In the investigation it was noted that the number of wheel separations was probably underreported, since accident reports were normally only initiated if the separation resulted in damage or injury. Browse our list of categories or use our search tool to find the right . In section 7, the data are further analyzed with the objective of assessing the effectiveness of TPMS. Found inside – Page 354table is reserved for a description of the immediate and ultimate effects of each of the failure modes on other ... The top event , the flat tire , is broken down into two immediate contributing events , road debris and tire failure . Failure Analysis of tires requires the use of unique mechanical and analytical techniques. http://waltersforensic.com/articles/failure_analysis/vol6-no1.htm, WHEEL-CHECK®: High visibility loose wheel-nut indicator, WHEEL-TORQUE: Red torque indicator used to mark a nut has backed off, and maintenance is aware of the problem, WHEEL-CHECK®, HIGH TEMPERATURE: Loose wheel-nut indicator that withstands higher temperatures. In-service catastrophic radial tire failure is often a separation of the tread and outer steel belt from the tire casing and inner steel belt. Smithers specializes in analyzing tires and components for a variety of physical and chemical characteristics. Understanding the construction of the tire will make failure analysis easier. Road hazard damage occurs when a sharp object comes in contact with the tire. Most Common Types of Tire Failure. In the early 1990’s, a U.S. organization called the National Transportation Safety Board prepared a special investigation into medium/heavy truck wheel separations. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): This report is an assessment of what is presently understood about the recent Firestone ATX and AT tire problems. This increases the risk of a sudden tire failure the older a tire gets. This equipment can also be used by our engineers and experts to identify hidden evidence in melted debris after a fire. Despite all the recent media attention the problem of wheel separations is not new. . "We're seeing more road breakdowns from customers who don't normally experience road breakdowns," said Jason Miller, national fleet channel sales manager, Cooper Tire and Rubber Co. He's seeing it because he's looking for it. Sometimes, the 3-in. The failure tire is a retreaded bia tire, retreading level: 3, P/N: 441K82-1, standard size: H44.5 × 16.5-2, used landing cycles since installation: 134. The Firestone and Ford tire controversy was a period of unusually high failures of Firestone P235/75R15 ATX, ATX II, and Wilderness AT tires installed on the Ford Explorer and other similar vehicles. Found inside – Page 86Application of reduction techniques to : a ) damage and failure analysis ; b ) thermomechanical response of tires ; and c ) rolling tire problem . Development of reduction techniques for hierarchical sensitivity analysis Bridge gap ... The cause of traffic crashes that follow a sudden tire failure is a point of contention in the literature. Found inside – Page 286Carmichael.44 Kumho Tire involved an automobile accident caused by a tire blowout that resulted in severe injuries. The plaintiffs offered an expert in tire failure analysis who concluded that a defect in the tire's manufacture or ... Resource: shape and the cause of the failure being investigated. Failure analysis services can be conducted "on site" from our mobile lab or "in . Zhao, Dawei, Yuanxun Wang, Xiaodong Wang, Xuenong Wang, Fa Chen, and Dongjie Liang. Over the last few months a seemingly high incidence of accidents related to truck wheel separations has been reported in the news. Smithers can assist in tire failure analyses, process troubleshooting, and forensics from raw material to end-of-life analyses. "Process analysis and optimization for failure energy of spot welded titanium alloy." Materials & Design 60 (2014): 479-489. These separations generally occur in the field at high temperature and high speed. Crash Forensics provides tire failure analysis services for passenger vehicles, heavy trucks, and heavy equipment tires. From 1994 to 2002, Dr. Omar worked as a Senior Research Scientist at the National Crash Analysis Center (NCAC), the renowned . I would come to Brian again in a heartbeat for his expertise, and we certainly value the relationship with him and U.S. Forensic. It provides an overview of factors related to tire failures of the type observed. Other times, the autopsy requires a bit . Richard Sherman. Search our transportation expert witness and consultant directory that includes expert listings for motorcycles, visibility studies, transportation regulation compliance economics, construction vehicles, airbags, Tire Failure and more. Failure Analysis of Motor Tire Bead Wires During Torsion Test Failure Analysis of Motor Tire Bead Wires During Torsion Test Das, Souvik; Koli, Prashant; Mathur, Jitendra; Dey, Arthita; Bhattacharyya, Tanmay; Bhattacharyya, Sandip 2013-10-10 00:00:00 J Fail. Factory Experience - Tire Factory Hanford California, Technical Director R&D and Quality. Tire Failure Analysis. Analysis guide for truck tires. The right side tire (size 275/80R22.5) that was rotated to the right front steer position by the tire shop should not have been installed on the front steer axle. It was smaller in width, smaller in diameter, had a smaller static radius and had a lower load carrying capacity. Found inside – Page 548Furthermore , these analytical tools should be able to predict tire failure modes during the design phase so that appropriate steps can be taken to prevent undue tire failures during aircraft ground operations . The family of tire ... Tire failure-related legal actions usually focus on determining the cause for the tire failure. It was the incorrect size and was not the recommended 295/80R22.5 size for the front steer axle. Based on DOT code on the tire wall, the left front tire was approximately 3.9 years old at the time of the failure. As a motorist your option to defend against a collision with a separated wheel assembly is severely limited as it is primarily situation dependent. Another option is to watch for smoke or fumes emanating from truck wheel assemblies as this is a symptomatic sign of overheating and may indicate that a wheel or tire tread separation is about to occur. Researchers can obtain compositional information about a tire sample using SEM images, which enables them to easily differentiate the rubber matrix from the inorganic fillers based on the high image contrast between these materials. INTRODUCTION Read this manual carefully - it is important for the SAFE operation and servicing of your tires. Xu Fengxiang, Guangyong Sun, Guangyao Li, and Qing Li. The causes presented were mainly attributed to improper maintenance and overloading. Tire life data are obtained from a laboratory test, which is developed to . Toll Free Number – Central Time Zone: (888) 873-0012 Many times, the heat caused by driving at high speeds will affect the weak areas of the tire and lead to a rupture. Our tire failure analysis engineer has qualified as an expert in Federal courts and has investigated various tires such as radial medium truck, light truck, and passenger tires. Michael Ingram was the managing editor of Fleet Equipment's sister publication Tire Review. Metallurgical analysis of a large number of failed wheeled studs have revealed that all had failed from . www.PDHcenter.com PDHonline Course G486 www.PDHonline.org ©2014 Peter Chen NHTSA FAR Database • The National Highway Traffic Safety Administration (NHTSA) keeps a . The last section, U.S. Forensic provides fast and accurate answers to challenging cases. TRUCK TIRE/ WHEEL SEPARATIONS. Found inside – Page 658... rested in significant part on the testimony of their tire failure analysis expert, Dennis Carlson. It was undisputed that the blowout was caused by a separation of the tire tread from the inner steel-belted “carcass” of the tire. The 275/80R22.5 tire that was installed on the right front steer position at the time of the left front steer tire failure had both shoulders worn with reduced tread depth. Over the last few months a seemingly high incidence of accidents related to truck wheel separations has been reported in the news. Published 2008. The tire test conditions are usually harsh conditions such that the applied load is twice the rated . DOI: 10.15406/aaoaj.2018.02.00026 Finite element analysis of aircraft tire behaviour under overloaded aircraft landing phase 33 As rubber ages, it loses elasticity, hardens and can become brittle. Not every tire failure requires a major investigation. Also, variances were revealed in the manner in which agencies within the transportation industry reported accidents. Tires do not last forever, even if the tread shows little visible wear. 2. Consultants found here may also provide expert witness testimony on issues regarding rain grooves . info@usforensic.com. We can evaluate: For more information about our automotive services, visit our Automotive Page, (504) 831-7001 Office It provides an overview of factors related to tire failures of the type observed. One of the main causes of tire failure is under-inflation. Sometimes, the 3-in. tire. Those are the results of an analysis performed by the National Automotive Sampling System-Crashworthiness Data System. Subsequent investigations linked the failures to accidents that caused 271 deaths and over 800 injuries in the United States dating back to the early 1990s, and more internationally.
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