Browse Topic: Durability
ABSTRACT High life cycle costs coupled with durability and environmental challenges of tracked vehicles in South West Asia (SWA) have focused R&D activities on understanding failure modes of track components as well as understanding the system impacts on track durability. The durability limiters for M1 Abrams (M1, M1A1, and M1A2) T-158LL track systems are the elastomeric components. The focus of this study is to review test methodology utilized to collect preliminary data on the loading distribution of a static vehicle. Proposed design changes and path forward for prediction of durability of elastomers at the systems level from component testing will be presented
Innovators at NASA Johnson Space Center have developed a method using low-viscosity RTV silicone to form durable seals between polymer bladder and metal bulkhead interfaces to be used for inflatable space habitats
Implants that steadily release the right dose of a drug directly to the target part of the body have been a major advance in drug delivery. However, they still face some key challenges, such as ensuring that the drug is released at a constant rate from the moment it is implanted and ensuring that the implant is soft and flexible enough to avoid tissue damage but tough enough not to rupture. One particular challenge is to avoid triggering the foreign body response, which is when the patient’s body encloses the implant in a tight capsule of tough connective tissue which can slow the drug’s release or prevent it from diffusing out
The last time you dropped a mug, you may have been too preoccupied to take much notice of the intricate pattern of cracks that appeared in the broken object. But capturing the formation of such patterns is the specialty of John Kolinski and his team at the Laboratory of Engineering Mechanics of Soft Interfaces (EMSI) in EPFL’s School of Engineering
A research team from Pohang University has successfully enhanced the performance and durability of all-solid-state batteries. This breakthrough was made possible through the implementation of a novel approach known as bottom electrodeposition
To save on fuel and reduce aircraft emissions, engineers are looking to build lighter, stronger airplanes out of advanced composites. These engineered materials are made from high-performance fibers that are embedded in polymer sheets. The sheets can be stacked and pressed into one multilayered material and made into extremely lightweight and durable structures
A durable, copper-based coating developed by a team at Dartmouth University can be integrated into fabric to create responsive, reusable materials such as protective equipment, environmental sensors, and smart filters
In alignment with the U.S. Army's Climate Strategy and the broader trend in automotive technology, there is a strategic shift towards electrification and hybridization of the vehicle fleet. While a major goal of this effort is to mitigate the carbon footprint of the U.S. Army's vehicle operations, this transition also presents an opportunity to harness advancements in automotive electrification. Among the key vehicles in focus are tactical wheeled vehicles, which provide military forces with versatile and rugged transportation solutions for various combat scenarios, ensuring mobility, protection, and adaptability on the battlefield. This study investigates the potential of electrified tactical wheeled vehicles by conducting a survey involving a diverse group of vehicle operators across various ranks within the U.S. Army. The aim is to identify novel applications achievable through electrification or hybridization, encompassing functions such as establishing command posts, prolonged
Due to the expense and time commitment associated with extensive product testing, vehicle manufacturers are developing new simulation techniques to verify vehicle component performance with less testing and more confidence in the final product. Battery lifetime is of particular difficulty to predict, since each battery is different and there are many different control scenarios that could be implemented based on the specific requirements of each battery type. In order to solve this problem for a 12V auxiliary lead-acid battery, a battery durability analysis model has been previously adapted from lithium-ion applications, which is capable of verifying the impact of lead-acid battery durability in a short period of time. In this study, calibration tools for this model were developed and are presented here, and durability analysis and verification are performed for the application of new electric vehicles. New control strategies, designed specifically for the auxiliary batteries in
This paper reviews the current situation in the development of accelerated testing of automotive engineering, consisting of the four following areas: 1. Field testing of the natural product. 2. Additional technology of separate testing in the laboratory on the basis of physical simulation of separate field conditions using corresponding methods and equipment separately and conducting: safety testing, special programs of testing using digital simulation, special testing with changing certain parameters of environment, corrosion testing, etc. Both of the traditional testing developments above can be found in many magazines, journals, conferences, presentations, and proceedings. 3. Testing on the basis of digital (computer) simulation of product and/or field conditions. This area of testing has been developed in the last dozen years. Many articles and presentations were published during this time. 4. Accelerated reliability and durability testing for obtaining during service-life of the
Dramatic video of the first flight of the Space Launch System (SLS), from the initial blastoff to rocket-booster separation, gave NASA essential information about the performance of the Artemis I flight. It also proved the capabilities of a new rugged video camera mounted on the exterior of the core rocket stage. The camera, developed using patented NASA hardware and agency expertise, survived the heat of blastoff and the cold of space, and it’s now ready for extreme conditions on Earth
Nanotechnology is gaining popularity and used in the realm of transportation vehicles. Nanomaterials, with their distinct physical and chemical properties, have the potential to improve the safety and durability of transportation vehicles. This study analyzes the most current advances and uses of nanotechnology in the transportation vehicle business, such as nano-coatings, nano filters, carbon black for tires, and nanoparticles for engine performance enhancement and fuel consumption reduction. It also discusses the major hurdles for larger applications, such as environmental, health, and safety problems. Because some nanomaterials have demonstrated outstanding performance as well as theoretically investigated, they may be viable candidates for use in future environmentally friendly transportation vehicles. Improve the global transportation business
Cummins announced its seventh-generation series HE250 and HE300 waste-gate turbochargers for medium displacement on- and off-highway commercial engines. The turbos are sized for 5.5- to 8-liter medium-duty diesel engines and 8- to 11-liter natural-gas engines. Cummins states that the HE250 and 300 were designed to meet the global emissions regulations from 2024 onwards including the upcoming China Stage IV FE 2024, NSVII 2026 and Euro VII 2027. Cummins claims significant improvements in performance and durability compared to the outgoing models. Both turbos reportedly offer a 6-7% gain in overall efficiency as well as enhanced low-speed performance, which translates to additional low-end torque and better compatibility with engine start/stop systems
Medical and surgical instruments are utilized daily to save and improve lives. Because of this, they demand an exact level of accuracy and infallibility in their manufacture. Traditionally, aluminum and other metals have been the standard material of choice for medical and surgical instruments due to their weight, strength, durability, and cost benefits. However, new advances in technology are challenging the status quo and offering exciting new manufacturing possibilities that allow for greater material choices. One such advancement already making waves in the aerospace, leisure, and automotive industries — and poised to benefit medical and surgical manufacturing — is Additive Fusion Technology (AFT
Due to the relatively high cost to produce solar cells, solar power still accounts for a little less than 3 percent of electricity generated in the U.S. One way to lower the cost of production would be to develop solar cells that use less-expensive materials than today’s silicon-based models. To achieve that, some engineers have zeroed in on halide perovskite, a type of human-made material with repeating crystals shaped like cubes
Researchers in the Lyding Group at the University of Illinois Urbana-Champaign have discovered an efficient, sustainable method for 3D-printing single-walled carbon nanotube films, a versatile, durable material that can transform how we explore space, engineer aircraft, and wear electronic technology
In an embedded world gone SOSA sensational, one might believe that centralized ATR-style OpenVPX systems are the best way to architect your next rugged system. While these chassis are routinely and successfully deployed on airborne, shipboard, and vetronics platforms, they are big, heavy, costly, and a real challenge to cool and connect. An alternate but equivalent rugged, deployable approach uses one or more small form factor chassis modules, distributed into any available space in the vehicle, interconnected via Apple® and Intel’s® 40Gbps Thunderbolt™ 4, a commercial open standard that uses USB Type-C connectors with a single, thin bi-directional copper or fiber cable
Rice University engineers are turning sunlight into hydrogen with record-breaking efficiency thanks to a device that combines next-generation halide perovskite semiconductors with electrocatalysts in a single, durable, cost-effective, and scalable device
Sutures are used to close wounds and speed up the natural healing process, but they can also complicate matters by causing damage to soft tissues with their stiff fibers. To remedy the problem, researchers from Montreal have developed innovative tough gel sheathed (TGS) sutures inspired by the human tendon
Toyota's luxury arm concurrently introduced the all-new, three-row 2024 Lexus TX and the long-awaited redesign of the rugged Lexus GX, also a '24 model. Both were met with enthusiasm at a reveal in Austin, Texas, over what Lexus is calling the new “unified spindle,” an evolution of the spindle grille that has been divisive since it appeared on the 2012 GS sedan. In a nifty trick, engineers have figured out how to include ADAS sensors in the grille without having asymmetrical blocks interrupt the bars. Dealers and more mainstream customers will be most interested in the TX, as Lexus Group Vice President Dejuan Ross said buyers have been clamoring for a new three-row SUV. And there's good reason: 70% of all full-size SUVs sold in America have a third row. For midsize SUVs, the number jumped from 6% to 10% from 2016 to 2022, according to J.D. Power
Vehicle suspension systems that adopt Hotchkiss layout are commonly based on leaf springs. For better comfort for passengers, some features such as rubber pads are used on the springs to reduce noise from metallic contact between leaves, but those pads can compromise the durability of the spring if not well designed or located in the spring assembly, as we will demonstrate on this paper. To do so, it will be presented comparisons using CAE methodology and physical parts test results from vehicle and bench testing which were loaded in different conditions to demonstrate how the rubber pad position can influence the durability of the spring, especially near the eyelet region for some specific load conditions. The case studies presented here are focused on the impact of the rubber pads on durability life of springs, but not defined as root cause of failures
Researchers from MIT’s Improbable Artificial Intelligence Lab, part of the Computer Science and Artificial Intelligence Laboratory (CSAIL), have developed a legged robotic system that can dribble a soccer ball under the same conditions as humans. The bot used a mixture of onboard sensing and computing to traverse different natural terrains such as sand, gravel, mud, and snow, and adapt to their varied impact on the ball’s motion. Like every committed athlete, “DribbleBot” could get up and recover the ball after falling
An injectable biomaterial with significantly improved adhesive strength, stretchability, and toughness could enable improved surgical sealing. This chemically modified, gelatin-based hydrogel has attractive features, including rapid gelation at room temperature and tunable levels of adhesion. This custom-engineered biomaterial is ideal as a surgical wound sealant, with its controllable adhesion and injectability and its superior adherence to a variety of tissue and organ surfaces
The VITA 90 family of standards, also known as VNX+, is being crafted to support the government and commercial requirements for ruggedized, small form factor (SFF), Modular Open Systems Architecture (MOSA) compliant, electronic systems suitable for deployment on small aerial platforms, C5ISR pods, spacecraft, ground vehicles, as well as man-wearable applications. The VITA 90 VNX+ standards borrow heavily from VITA 65, also known as OpenVPX, the family of standards which are arguably the dominant MOSA standards used in today’s avionic, vetronic, and space systems. VNX+ has been selected by the Sensor Open Systems Architecture (SOSA) consortium as a SFF standard to be used for C5ISR sensor payloads in space constrained applications, typical in manned and unmanned air vehicles and spacecraft
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