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  • Recent Car Discussions:

    6 speed auto vs 6 speed manual?
    2:40 pm today

    sweatycontact

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    6 speed auto vs 6 speed manual (2015-2017 mustang GT) Which one would be faster?



     
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    Suicide nova?
    12:55 pm today

    C_Monkey

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    Read 7 Times
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    I've got a flat black 1967 4 door Chevy Nova 2, and was wondering if I should lower it, give it suicide doors and a 2 inch cowl hood, or would it just look ugly?00k0k_gcJmC1L1I5C_600x450.jpg.d0edc3c8ed972264841e7d29064afeab.jpg00m0m_fpmftcGQcon_600x450.jpg.fd0104910c4d29a252649d9aef3835a1.jpg



     
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    Fatigue life prediction of rubber bushing in vehicle system
    1:08 am today

    Abby Yuan

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    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).



     
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    Basic knowledge of shock absorbing rubber products
    1:05 am today

    Abby Yuan

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    Basic knowledge of shock absorbing rubber products

    1. Static stiffness: refers to the ratio of the change of pressure (or tensile force) to the change of displacement in a given displacement range. The static stiffness must be measured within a certain displacement range. The static stiffness values measured in different displacement ranges are different, but some families require the change curve measured in the whole displacement range.

    2. Dynamic stiffness: It refers to the ratio of the change of pressure (or tensile force) to the change of displacement of damping rubber in a certain displacement range and a certain frequency.

    3. dynamic magnification: the ratio of the dynamic stiffness to the static stiffness measured by the damping rubber in a certain range of displacement.

    4. Loss coefficient: There is a phase difference between the deformation of rubber and the stress of rubber in the course of the force acting on damping rubber, and the stress of rubber is generally ahead of the phase angle of the deformation of rubber.

    5. Torsional stiffness: refers to the ratio of torsional moment to torsional angle of damping rubber within a certain range of torsional angle.

    6. Durability: It refers to the number of times of vibration when the rubber is in good condition after n times of reciprocating vibration under certain preloading load, amplitude and vibration frequency in a certain direction.Thanks for the help and support of Chongqing Feilong Jiangli Auto Parts technical department.



     
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    Kia Forte 2019 Review - How is new sedan from Kia? compare to Elantra?
    8:49 pm yesterday

    CharlieMin

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    Read 46 Times
    2 Replies



    Hello guys! Today, let s do review Kia Forte 2019.
    It s been awhile since Kia Forte 2019 has been introduced in Korea, but i wanted to test drive 2019 Kia Forte,
    so i could compared to Hyundai Elantra 2019.

    Kia Forte 2019 ReviewLet us know which you like better Forte 2019 or Elantra 2019.

    Kia Forte 2019 Review.png



     
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