GB/T 5909-2021 PDF EnglishUS$245.00 · In stock · Download in 9 seconds
GB/T 5909-2021: Commercial vehicles - Wheels - Performance requirements and test methods for cornering and radial fatigue Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 5909: Historical versions
Similar standardsGB/T 5909-2021: Commercial vehicles - Wheels - Performance requirements and test methods for cornering and radial fatigue---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT5909-2021 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.50 CCS T 22 Replacing GB/T 5909-2009 Commercial vehicles - Wheels - Performance requirements and test methods for cornering and radial fatigue (ISO 3894:2015, Road vehicles - Wheels/rims for commercial vehicles - Test methods, MOD) ISSUED ON: OCTOBER 11, 2021 IMPLEMENTED ON: MAY 01, 2022 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 6 2 Normative references ... 6 3 Terms and definitions ... 6 4 Test wheels ... 7 5 Performance requirements ... 7 5.1 Dynamic bending fatigue test performance requirements ... 7 5.2 Dynamic radial fatigue test performance requirements ... 7 6 Test methods ... 8 6.1 Dynamic bending fatigue test ... 8 6.2 Dynamic radial fatigue test ... 11 Annex A (informative) Structural changes of this Standard compared with ISO 3894:2015 ... 14 Bibliography ... 15 Commercial vehicles - Wheels - Performance requirements and test methods for cornering and radial fatigue1 ScopeThis Standard specifies the test wheels, performance requirements and test methods for cornering and radial fatigue tests of commercial vehicle wheels. This Standard is applicable to the wheels used for commercial vehicles and trailers specified in GB/T 3730.1.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 2933, Wheels and rims for pneumatic tyres - Vocabulary, designation and marking (GB/T 2933-2009, ISO 3911:2004, IDT) GB/T 3730.1, Motor vehicles and trailers - Types - Terms and definitions (GB/T 3730.1-2001, ISO/WD 3833:1999, MOD)3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in GB/T 2933 and GB/T 3730.1 as well as the followings apply. 3.1 wheel-tire assembly an assembly made up of wheels, tires and valves 3.2 crack the material separation that occurred during the test expanded to 3mm and above where, µ - The set friction coefficient between tire and road surface, see Table 1; R - The tire static load radius is the maximum tire static radius specified by the vehicle or wheel manufacturer to be used on the wheel, in meters (m); d - The internal or external offset of the wheel (the internal offset is positive and the external offset is negative), in meters (m); If the wheel uses both internal offset and external offset, the internal offset is used; Fv - The rated load on the wheels specified by the vehicle or wheel manufacturer, in newtons (N); S - The strengthening factor, see Table 1. 6.1.3 Test procedures 6.1.3.1 Refer to Figure 1 for a way to clamp the test wheel to the test equipment. Tighten the wheel tightening bolts (or nuts) to the torque value specified by the vehicle or wheel manufacturer. If it is not specified, it is recommended to tighten it according to Table 3. When using the device in Figure 1a) or Figure 1b) to test, check the amount of radial runout at the end of the lever arm. It shall not exceed 0.3mm when empty. 6.1.3.2 Set test parameters such as bending moment, speed and number of cycles. Start the test. In the initial stage of the test, the machine can be shut down to tighten the bolts or nuts once again. If the bolt breaks during the test, continue the test after replacing all the bolts. 6.1.3.3 Shut down after completing the specified number of test cycles. Use penetrant testing or other acceptable methods to check for wheel cracks. 6.1.4 Failure criterion In any of the following situations, the test is terminated and the wheel fails: a) The test wheel cannot continue to bear the test load; b) The original crack develops or stress causes new cracks to invade the wheel section; c) The offset increment of the loading point exceeds 15% of the initial offset of the test. 6.2 Dynamic radial fatigue test 6.2.1 Test preparation The test equipment shall have a driven drum and wheel mount to make the wheel-tire assembly rotate under a fixed radial force, see Figure 2. The minimum diameter of the drum is 1700mm. The width shall be wider than the tire section. The surface shall be smooth. The connecting surface of the wheel mount shall have the same assembly dimensional characteristics as the connecting parts usually used on the vehicle. The surface hardness is recommended to be HRC40~HRC50. The loading system shall maintain the specified load. The deviation does not exceed ±2.5% of the calculated value of the test load. The loading direction is perpendicular to the surface of the drum. And it is consistent with the connection direction between the center of the wheel mount and the center of the drum. The axis of the drum and the axis of the wheel mount shall be parallel. The wheels used as two wheels shall be tested in accordance with the wheels used for single wheels. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 5909-2021 be delivered?Answer: The full copy PDF of English version of GB/T 5909-2021 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 5909-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 5909-2021_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 5909-2021 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version GB/T 5909-2021?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 5909-2021 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of GB/T 5909-2021?A step-by-step guide to download PDF of GB/T 5909-2021_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 5909-2021". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
