Study on mechanical properties of composite pre-tightened toothed based on variable stiffness soft materials

doi:10.19936/j.cnki.2096-8000.20260728.005

Abstract

Abstract: The embedding of soft materials makes the load distribution among the teeth in the pre-tightened tooth joint of composite materials tend to be uniform, improving the bearing performance of the joint. However, it also leads to stress concentration at the tooth tip of a single tooth, which cannot fully utilize the performance of the soft material. Based on this, this paper proposes a single-tooth joint configuration with embedded variable stiffness soft materials. Through experiments and finite element models, the influence of constant stiffness and variable stiffness soft materials on the bearing capacity of single-tooth joints is compared and analyzed. The research results show that compared with the traditional single-tooth joint, embedding constant stiffness soft materials reduces the bearing capacity of the single-tooth joint by 54.4%, while embedding variable stiffness soft materials increases the bearing capacity of the single-tooth joint by 12.5%. Compared with constant stiffness soft materials, the embedding of variable stiffness soft materials can effectively reduce the stress concentration at the tooth tip of the composite material teeth, thereby improving the bearing performance of the joint.

Key words: pre-tightened toothed connection, constant stiffness soft materials, variable stiffness soft materials, stress concentration, progressive damage model

CLC Number:

TB332

LI Fei, XU Wei, ZHAO Lieqiu, CHEN Weizhao. Study on mechanical properties of composite pre-tightened toothed based on variable stiffness soft materials[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(7): 33-43.

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