The Influence of Patch Structure Design on the Tensile Properties of Carbon Fi-ber Composite Repair Samples
The bonded repair technology has been widely used in damaged composite structures.In this paper,a novel patch structure is proposed to enhance the load-bearing capacity of composite specimens after adhesive patching,The damage mechanism of patches of different carbon fiber composite repair structures during uniaxial stretching is analyzed by establishing a three-dimensional progressive damage finite element model.Experimental data such as tensile strength and maximum displacement of different composite repair structures were obtained through experi-ments and finite element simulations.The results show that in uniaxial tensile test the maximum displacement load and tensile strength of composite laminates with the new repair structure at failure reach 3.49 mm and 319 MPa,re-spectively,which are improved by 15.9%and 5.1%,respectively,relative to that of the stepped repair structure.The es-tablished finite element simulation model agrees well with the experimental results and can be used to predict the damage mode and damage extension of the composite repair structure.
NETL
NSTL
万方数据
