Study on the effect of repair techniques on the residual strength of asymmetric composites

doi:10.19936/j.cnki.2096-8000.20260828.015

Abstract

Abstract: A study was conducted on the residual strength of asymmetrical composite materials after scratch damage repair. Tensile tests were performed on composite specimens repaired using both patch and scarf repair techniques to compare the effectiveness of different repair methods. A numerical simulation model was developed to analyze the repaired specimens, and the accuracy of the model was validated by comparing the simulation results with experimental data. To further investigate the influence of repair parameters on the effectiveness of scarf repairs, the ultimate loads for different overlap widths were calculated, and the optimal strength recovery factors corresponding to various thicknesses and overlap configurations were determined. The results show that the patch repair technique is effective for surface scratch damage, achieving up to 90% strength recovery. The stepped scarf repair method demonstrated better performance than the double-layer lap repair. However, the repair effectiveness decreases with increasing composite thickness.

Key words: asymmetrical composite materials, scratch damage, repair techniques, strength recovery factor

CLC Number:

TB332

MA Mingze, MENG Qingchun, XIONG Xin, WANG Shiming, WU Fuqiang, WANG Guanhua. Study on the effect of repair techniques on the residual strength of asymmetric composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(8): 115-123.

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