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  4. Vol 11, Issue 1, 2026

Research on Static Strength Design of Automotive Drive Shafts Based on Strength Fields

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DOI: 10.23977/jemm.2026.110107 | Downloads: 2 | Views: 72

Author(s)

Tong Li 1

Affiliation(s)

1 School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, China

Corresponding Author

Tong Li

ABSTRACT

Taking a certain automotive transmission intermediate shaft as an example, the mismatch between the structural stress field and overall strength in strength design theory, coupled with the lack of relevant theoretical and technical basis for quantitative alignment between design and manufacturing, leads to localized strength excess in structural design and manufacturing. This paper proposes a comprehensive strength design theory and methodology based on structural strength fields and full-field stress-strength interference theory. by solving for maximum stress and its gradient direction stress distribution alongside the strength distribution curve in that direction, and utilizing the full-field stress-strength interference model and the end-hardening characteristics of structural materials, the optimal location of critical points is designed while minimizing local strength excess in subsurface and core regions. The final design results demonstrate: The critical point is located 2.6 mm from the surface, reducing strength excess by 529 MPa at this point; At the core position 4.5 mm from the surface, strength excess is reduced by 686 MPa, effectively resolving localized strength excess issues. Static strength tests were conducted on the strength-matched drive shaft. Test results confirm that the shaft meets all static strength requirements post-matching, validating the correctness and feasibility of this methodology.

KEYWORDS

Drive Shaft, Strength Fields, Full-Field Stress-Strain Interference Model, Quenching Characteristics

CITE THIS PAPER

Tong Li. Research on Static Strength Design of Automotive Drive Shafts Based on Strength Fields. Journal of Engineering Mechanics and Machinery (2026). Vol. 11, No. 1, 64-74. DOI: http://dx.doi.org/10.23977/jemm.2026.110107.

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