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Optimizing mechanical performance of strain-hardening cementitious composite joints using bio-inspired structured suture interfaces with geometrically-tuned deformation
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DOI：10.1016/j.engfracmech.2026.112097.png)
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Abstract
En 中文
Geometrically structured suture interfaces in natural systems exhibit remarkable mechanical performance, inspiring innovative engineering joint designs. In this study, generalized trapezoidal suture geometries are integrated into Strain-Hardening Cementitious Composite (SHCC) specimens to investigate their mechanical behavior and to guide the development of high-performance joints. Flexural tests were performed on SHCC specimens featuring bio-inspired structured suture joints with geometrically tuned deformation. Key mechanical properties, including flexural strength, ductility, failure modes, and energy absorption, were evaluated to optimize suture geometry. Triangular suture geometries were found to promote uniform stress distribution and superior mechanical performance. Specimen S beta-1A90W1.0 achieved an 18.8% increase in loadbearing capacity and a 6.8% enhancement in energy absorption compared to the unjointed cast counterpart. These results demonstrate that coupling bio-inspired suture interfaces with the strain-hardening characteristics of SHCC enables synergistic enhancements in strength and energy absorption, providing a reliable pathway for designing structurally efficient engineering joints.
Keywords:
Bio-inspired joint design
Structured suture interface
Strain-Hardening Cementitious Composite
(SHCC)
Mechanical behavior
Ductility
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