Jump to content

  • Welcome to Auto Parts Forum

    Whether you are a veteran automotive parts guru or just someone looking for some quick auto parts advice, register today and start a new topic in our forum. Registration is free and you can even sign up with social network platforms such as Facebook, X, and LinkedIn. 

     

Fatigue life prediction of rubber bushing in vehicle system

袁春凤 (Tiffany)
 Share

Recommended Posts

袁春凤 (Tiffany) Enthusiast

袁春凤 (Tiffany)

Posted
Posted

Fatigue life prediction of rubber bushing in vehicle system

1.Response analysis of rubber bushing under random excitation The Monte Carlo method is used to simulate the random excitation spectrum.

2. The fatigue life calculation of rubber bushing under random load can calculate the maximum strain energy density of rubber bushing under different excitation by using the response characteristics of rubber bushing under engine and road excitation obtained previously. The fatigue life of rubber bushing can be calculated under different load conditions. The maximum strain energy density U = 0.5134Nmm2 and the fatigue life N = 771371 were predicted under the excitation of engine speed n = 3000r/min and class B pavement, while U = 0.6893Nmm2, N, = 146774 under the excitation of engine speed n = 3000/min and class D pavement.(Thanks for the help and support of Chongqing Feilong Jiangli Auto Parts technical department.)

3. The test verification of the front sub-frame module is expensive because of the fatigue test of the whole vehicle system. Now the former sub-frame module is the research object, and the calculation results are compared with the test results. The front sub-frame is installed in accordance with its layout in the vehicle, and the six points connected with the body on the sub-frame are restrained. Sinusoidal excitation is carried out at the midpoint of the rear beam, and the maximum frequency which can be reached under the condition of satisfying the amplitude of the force is taken as the test frequency. The amplitude of force is 2.45.2kN. Fatigue failure criteria of rubber bushing: 2mm crack (equivalent to 20% of tensile coefficient).

Link to comment
Share on other sites
Great Tire Deal

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing

  • Similar Content

  • Similar Topics

    • shelitaauto
      Ford’s Electric Vehicle sales surged in the second quarter, followed only to Tesla in the United States
      By shelitaauto
      URL: 
      link hidden, please login to view Source: Gasgoo
      In the second quarter, 
      link hidden, please login to view’s electric vehicle sales in the United States again surpassed General Motors, ranking second in the U.S. electric vehicle market sales, and is on track to close the gap with Tesla.
      Ford Mustang Mach-E; Image source: Ford
       
      In the second quarter of this year, Ford sold 23,957 electric vehicles in the United States, a 61% increase from the same period last year, when total electric vehicle sales were 14,843. Meanwhile, Ford’s sales of hybrid vehicles rose 55 percent year over year. However, sales of internal combustion engine cars were down 5 per cent year on year.
      Ford saw double-digit sales growth for several of its electric vehicles. Sales of the Ford F-150 Lightning rose 76.9% to 7,902 units. While new competitors such as the Tesla Cybertruck and the Chevrolet Silverado EV RST have all hit the U.S. market, the Ford F-150 Lightning remained the best-selling electric truck in the U.S. in the first half of the year, with 15,654 units sold.
      Second-quarter sales of the Ford Mustang Mach-E were up 46.5% year-over-year to 12,645 units. In the first half of this year, 22,234 units of the Mustang Mach-E were delivered, the best performance ever. Sales of Ford’s E-Transit electric van continued to climb in the second quarter, rising 95.5 percent to 3,410 units from a year earlier.
      In the first half of 2024, Ford sold a total of 44,189 electric vehicles in the U.S. market, up 72% from 25,709 in the same period last year.
      Ford CEO Jim Farley said the automaker is shifting to smaller, more affordable electric vehicles to close the gap with Tesla and fend off competitors like BYD worldwide. Referring to Americans’ love affair with “larger vehicles,” Farley said smaller electric vehicles are “very important to driving the decarbonisation of American society and the development of electric vehicles.”
      Ford’s surge in electric vehicle sales in the US market is enough for it to continue to overtake General Motors. In the United States, GM delivered 21,930 electric vehicles in the second quarter, compared with 38,355 in the first half of 2024.
      GM is also ramping up production by introducing new models, with electric models such as the Chevrolet Blazer, Equinox and Silverado coming to the U.S. market. While Tesla did not give specific sales figures by region, its second-quarter electric vehicle sales worldwide exceeded expectations, delivering 443,956 electric vehicles and remaining №1 in the U.S. market.
      As competition in the U.S. electric vehicle market intensifies, other competitors, including Hyundai and Kia, also set new EV sales records in the second quarter. Hyundai Motor, for example, set a new sales record with its IONIQ 5 model, which sold 18,728 units in the first half of the year. Meanwhile, sales of Kia’s first three-row electric SUV, the EV9, are also climbing.
    • Counterman
      Dealing with deposits to boost engine life
      By Counterman
      Theory can only take you so far when formulating engine oil. Complex modeling is an important step, but it can’t duplicate the magic that happens inside the cylinder. Operating conditions, duty cycles, driver behavior—it all impacts how an engine ages. As it does, deposits form within the engine. The carbonaceous compounds that form on various engine components, including pistons, valve trains, and timing chain covers are a natural occurrence; a consequence of aging that result from the breakdown of oil components at high temperatures, particularly during the combustion process. The highest temperatures occur on the metal surfaces within the engine, where these deposits tend to adhere.
      “There are some deposits that are temporary that you can wipe off with your finger, and there are others that can get very thick,” explained Dr. Michael Warholic, global technology director, Valvoline Global Operations. “The bad thing about deposits—and actually there are several bad things—are that, first of all, they insulate and you can’t get the heat out.
      “They also cause friction.”
      Friction is exceptionally bad, especially if you’re formulating oil. Thick deposits can clog oil passages, restricting the flow of oil to critical engine parts. This leads to inadequate lubrication, exacerbating wear and potentially causing engine failure. Traditionally the role of engine oil has been to slow down engine deposit development, but in concocting its latest engine-protecting blend, the Valvoline team stumbled upon something … surprising.
      “We were trying to basically minimize deposits, engine wear, friction and heat, and oil formulation is a balance, so you have to pick and choose what you want it to do,”  Warholic  explained. “What we didn’t know was before the testing that it would remove and reverse the process–that is something you can’t predict by modeling. Restore and Protect removed engine deposits.
      “I had never seen anything like it before, and I have eight years at Valvoline and 16 years at a company that makes the additives used in oil formulation.”
      Valvoline’s Restore and Protect is a fully synthetic motor oil that aims at both older, high-mileage vehicles (restore) and new vehicles (protect). While Warholic was tight-lipped about the specific blend of additives within the oil, Valvoline has noted two proprietary technologies–Active Clean, which removes deposits and Liqui-Shield, which prevents deposit formation.
      It’s not just marketing—at a recent event, Valvoline put Restore and Protect-cleaned pistons on display. Take a look:
      Valvoline validates its oils through industry standard tests such as the GF-6 SP specification, which uses a Chrysler Pentastar engine to measure deposit formation. These tests provide a benchmark for oil performance, ensuring that the oil meets or exceeds industry requirements.
      “Exceeds” is the key word. Warholic was quick to point out that these types of tests are merely the baseline within the oil market, not the high bar that oil manufacturers should seek to leap over.
      “We want to exceed the API specifications and excel in all categories. Restore and Protect is already GF-7 capable, which is great,” he said.
      Real-world testing is crucial. For instance, a Ford Mustang was subjected to extensive testing with Restore and Protect, showing significant reductions in wear and deposit formation. The testing extended to various engine components, including the timing chain cover, oil pan, and valve train, demonstrating the comprehensive benefits of the oil. The team also ran Restore and Protect in a Ford Explorer with more than 500,000. “And we also did a chassis dynamometer test where we put a vehicle on rollers basically and ran it 300,000 miles,” Warholic said. “Restore and Protect actually cleaned up the entire engine.”
      For automotive aftermarket professionals, understanding the use of high-performance oils can lead to better engine health, improved engine operating efficiency,  reduced maintenance costs and happy customers.
      “We’re trying to maximize engine life,” Warholic said. “Vehicles are getting older. The vehicle life on the road is getting older. Vehicles may change owners and engines are going to be running longer. For us, it’s about maximizing engine performance so that you don’t lose fuel economy, you don’t lose efficiency, and you don’t break down on the highway.”
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • Dorman Products
      Mechanic trivia: Do you know which vehicle has the longer wiper blade on the passenger side?
      By Dorman Products
      Mechanic trivia: Do you know which vehicle has the longer wiper blade on the passenger side?
    • Dorman Products
      Before selling a vehicle, make sure to remove personal data from the infotainment system
      By Dorman Products
      Before selling a vehicle, make sure to remove personal data from the infotainment system
    • Counterman
      SKF Automating Tennessee Vehicle Aftermarket Warehouse
      By Counterman
      link hidden, please login to view announced it will automate the company’s aftermarket products warehouse in Crossville, Tennessee, scheduled for 2025. The warehouse will be retrofitted with a AutoStore robotic storage and picking system. Encompassing a 22,000-square-foot space, the system will include approximately 24,000 storage locations. The fully automated AutoStore picking solution represents a significant leap forward in SKF’s logistics capabilities, allowing for increased efficiency and precision in order fulfillment, the company said. Innovative Technology and Strategic Consolidation
      The Crossville facility was chosen for this new technology due to its existing role as SKF’s main distribution center in the US. The location offers substantial logistical benefits as a Free Trade Zone (FTZ), according to SKF. Additionally, Crossville already accommodates the SKF Vehicle Aftermarket North America component warehouse and Kitting Center, making it an ideal location to centralize warehousing, kitting, and logistics operations under one roof, the company added.
      Anticipating Enhanced Customer Experience
      The consolidation of storage and the introduction of advanced automation technology at the Crossville warehouse will significantly improve
      link hidden, please login to view operational efficiency. The facility’s 24,000 storage locations will ensure that a wide variety of products are readily available, enabling faster response times and better service for SKF’s customers. SKF Vehicle Aftermarket Global President Philipp Herlein said: “This strategic investment highlights SKF’s commitment to excellence in logistics, ensuring that the company continues to meet the evolving needs of its customers. By improving delivery lead times and optimizing order fulfillment processes, SKF is poised to enhance customer satisfaction and maintain its position as a trusted partner in the industry.”
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view

×
×
  • Create New...