Research on the Spring Creep Based on the Load Simulator of the Double Torsion Spring Steering Gear

Area of Science:

• Materials Science
• Mechanical Engineering

Background:

• Creep is a critical phenomenon in materials science, affecting component longevity under sustained load.
• Understanding room temperature creep is essential for accurate engineering design and material selection.

Purpose of the Study:

• To analyze and verify a new macroscopic tensile experiment method for determining room temperature creep parameters.
• To develop and validate a creep equation for springs under force at room temperature.
• To assess the accuracy of theoretical creep predictions against experimental data.

Main Methods:

• Utilized a mechanical double-spring steering-gear load table for creep testing.
• Employed a new macroscopic tensile experiment to obtain creep parameters.
• Applied finite-element analysis (FEA) to verify theoretical calculations.
• Conducted a specific creep strain experiment on a torsion spring.

Main Results:

• The developed creep equation accurately predicts spring creep strain and angle at room temperature.
• Finite-element analysis confirmed the correctness of the theoretical creep analysis.
• Experimental results for torsion spring creep strain were within 5% of theoretical calculations (4.3% lower).

Conclusions:

• The new macroscopic tensile experiment method and derived creep equation are highly accurate for room temperature creep analysis.
• The validated theoretical model meets engineering measurement requirements for spring creep.
• This research provides a reliable method for predicting and measuring spring creep behavior.