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High strength, light weight composite leaf spring and method of making

A technology of composite materials and leaf springs, applied in the field of leaf springs, can solve problems such as low efficiency of energy storage capacity

Active Publication Date: 2016-02-24
POLYONE CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While leaf springs have the advantage of being used as attachments and / or structural members in addition to being energy storage devices, their energy storage capacity per unit mass is extremely inefficient compared to other types of springs

Method used

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  • High strength, light weight composite leaf spring and method of making
  • High strength, light weight composite leaf spring and method of making
  • High strength, light weight composite leaf spring and method of making

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Example 1-ASTMD3039: Tensile properties of fiber resin composites

[0122] The following shows the continuous or discontinuous high modulus (> 20Gpa, which is greater than 3×10 6 Psi) Test results of the tensile properties of fiber-reinforced resin matrix composites. The test is implemented in accordance with the ASTM D3039 standard test method, and a test machine with a fixed part and a movable part is used to determine the tensile strength and tensile elastic modulus of the sample. The calculation of tensile strength uses the following formula: S = P / bd, where S is the ultimate tensile strength (MPa or psi), P is the maximum load (N or pounds), b is the width (mm or inches), and d is Thickness (mm or inches). The calculation of the elastic modulus uses the following formula: E=(ΔP / Δl)(l / bd), where E is the elastic modulus (MPa or psi), ΔP / Δl is the slope of the linear part of the load deformation curve, and l is The gauge length of the measuring instrument (mm or inch...

Embodiment 2

[0131] Example 2-ASTMD695: Standard Test Method for Compressive Properties of Rigid Plastics

[0132] Shown below are the test results of the compressive properties of resin matrix composites reinforced by oriented continuous or discontinuous high modulus fibers.

[0133] A test machine with a fixed part and a movable part is used to determine the compressive strength and compressive elastic modulus of the sample. The test method involves the determination of the mechanical properties of unreinforced and reinforced rigid plastics (including high modulus composite materials) under conditions of low strain rate and load rate uniformity. Strip samples are used in the test. The compressive properties of resin matrix composites reinforced by directional continuous, discontinuous or interlayer reinforcements can also be tested according to ASTM D3410.

[0134] Figure 34 with Figure 35 Shown are the fiber compression strength and fiber compression modulus results obtained using ASTM D6...

Embodiment 3

[0141] Example 3-ASTMD5379: Test method for measuring the shear characteristics of composite materials by the V-notch beam method

[0142] Shown below are the test results of using the V-notch beam method to measure the shear characteristics of resin matrix composites reinforced by oriented continuous or discontinuous high modulus fibers.

[0143] A testing machine with a fixed part and a movable part is used to determine the shear strength and shear modulus of the sample. The test method includes the determination of the shear characteristics of composite materials reinforced with high modulus fibers. The composite material is a continuous fiber or discontinuous fiber reinforced composite material in the following forms: 1) A laminate composed only of unidirectional fiber laminates whose fiber direction is parallel or perpendicular to the loading axis; 2) Only A laminate composed of textile filament laminates whose warp direction is parallel or perpendicular to the loading axis;...

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Abstract

A composite leaf spring comprising a thermoplastic matrix material reinforced with fibers embedded and aligned in the matrix of the composite leaf spring. Vehicle manufacturers have long sought to reduce weight of vehicles for the purposes of improving fuel economy, increasing payload capacity, and enhancing the ride and handling characteristics of automobiles, trucks, utility vehicles, and recreational vehicles. A large proportion of vehicles employ steel leaf springs as load carrying and energy storage devices in their suspension systems.

Description

Technical field [0001] The present invention generally relates to leaf springs, in particular to composite leaf springs used in applications such as automobile and truck suspension systems, and methods for manufacturing the leaf springs. Background technique [0002] For a long time, vehicle manufacturers have been committed to reducing vehicle weight in order to improve fuel economy, increase payload capacity, and increase the driving and handling characteristics of cars, trucks, utility vehicles and recreational vehicles. Most vehicle suspension systems use steel leaf springs as load-bearing and energy storage devices. Although the leaf spring can not be used as an energy storage device, it also has the advantage that it can be used as an attachment and / or structure, but compared with other types of springs, the energy storage capacity per unit mass of the leaf spring is extremely inefficient. Steel plate leaf springs are relatively heavy, noisy, and can be corroded. Therefor...

Claims

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Application Information

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IPC IPC(8): F16F1/368
CPCB60G11/02B60G2202/11B60G2206/428B60G2206/7101F16F1/368
Inventor 乔纳森·斯皮格尔本杰明·D·皮培尔爱德华·D·皮培尔迈克尔·戈登
Owner POLYONE CORPORATION
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