Springs and Elastic Component

Shimoseki, Masayoshi; Hamano, Toshio; Imaizumi, Tsutomu

doi:10.1007/978-3-662-05044-6_1

Cited by 2 publications

(4 citation statements)

References 1 publication

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“…When a car suddenly starts or stops, front-down or rear-down posture occurs, imposing a rotational torque or “wind-up torque” on the leaf spring [ 22 ]. Leaf springs experience longitudinal loading, in addition to vertical stiffness, especially when the vehicle brakes or accelerates.…”

Section: Resultsmentioning

confidence: 99%

“…For the wind-up load case setup, the applied boundary conditions for the eye were similar to the vertical push with free rotation around the y axis for the front eye, whereas the rear eye was constrained in the Y - Z translation and the X - Z rotation. After maximum vertical loading is applied, a longitudinal force was created and applied at the center of the parabolic leaf springs [ 22 ]. The wind-up establishment of the parabolic leaf springs is illustrated in Figure 2(b) .…”

Section: Contacts and Load Casesmentioning

confidence: 99%

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Explicit Nonlinear Finite Element Geometric Analysis of Parabolic Leaf Springs under Various Loads

Kong

Omar

Chua

et al. 2013

The Scientific World Journal

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This study describes the effects of bounce, brake, and roll behavior of a bus toward its leaf spring suspension systems. Parabolic leaf springs are designed based on vertical deflection and stress; however, loads are practically derived from various modes especially under harsh road drives or emergency braking. Parabolic leaf springs must sustain these loads without failing to ensure bus and passenger safety. In this study, the explicit nonlinear dynamic finite element (FE) method is implemented because of the complexity of experimental testing A series of load cases; namely, vertical push, wind-up, and suspension roll are introduced for the simulations. The vertical stiffness of the parabolic leaf springs is related to the vehicle load-carrying capability, whereas the wind-up stiffness is associated with vehicle braking. The roll stiffness of the parabolic leaf springs is correlated with the vehicle roll stability. To obtain a better bus performance, two new parabolic leaf spring designs are proposed and simulated. The stress level during the loadings is observed and compared with its design limit. Results indicate that the newly designed high vertical stiffness parabolic spring provides the bus a greater roll stability and a lower stress value compared with the original design. Bus safety and stability is promoted, as well as the load carrying capability.

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Section: Resultsmentioning

confidence: 99%

Section: Contacts and Load Casesmentioning

confidence: 99%

Explicit Nonlinear Finite Element Geometric Analysis of Parabolic Leaf Springs under Various Loads

Kong

Omar

Chua

et al. 2013

The Scientific World Journal

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“…To verify the correlation between the interpolation point and control point, the coordinates of the interpolation point generated through the NURBS curve are applied to finite-element analysis to create the torsion-spring shape for analysis [11][12][13]. Figure 2 shows the finite-element model of the torsion spring that was used to derive the displacement of the control point as it shifted according to the external force [14,15].…”

Section: Torsion-spring Displacement Analysismentioning

confidence: 99%

“…The coordinates of ( , , ), derived from Equations (9) to (11), were next applied to the inverse method to determine the displacement of the control point. This process is shown in Equation (12), which was derived with reference to Equations (4) and (5). Figure 3 shows the control point derived using Equation 12,…”

Section: Torsion-spring Displacement Analysismentioning

confidence: 99%

Numerical and Experimental Analysis of Torsion Springs Using NURBS Curves

Kim

Song²,

Jeon

2020

Applied Sciences

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Torsion springs, which transfer power through the twisting of their coil, provide advantages such as module simplification and efficient use of space. The design of a torsion spring has been formulated, but it is difficult to determine the local behaviors of torsion springs according to actual load conditions. This study proposes a torsion-spring design method through finite element analysis (FEA) using nonuniform-rational-basis-spline (NURBS) curves. Through experimentation, the angle and displacement values for the actual spring load were converted into useable data. Torsion-spring displacement values were obtained via experimentation and converted into coordinates that may be expressed using NURBS curves. The results of these experiments were then compared to those obtained via FEA, and the validity of this method was thereby verified.

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Springs and Elastic Component

Cited by 2 publications

References 1 publication

Explicit Nonlinear Finite Element Geometric Analysis of Parabolic Leaf Springs under Various Loads

Explicit Nonlinear Finite Element Geometric Analysis of Parabolic Leaf Springs under Various Loads

Numerical and Experimental Analysis of Torsion Springs Using NURBS Curves

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