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Based on Explicit simulation environment of ABAQUS, the finite element simulation 3D model of CFRP-Aluminum alloy bolted joint was established, and the corresponding single nail and single shear tensile experimental research were carried out. Combined with the experimental and simulation results, the damage failure modes of the bolted joint under uniaxial tensile loading were obtained. The aluminum alloy failure was based on the Ductile metal failure criterion, the CFRP failure criterion adopted the Hashin criterion modified by Shokrieh, which can represent 7 failure modes of the CFRP in fiber tensile and compression, matrix tensile and compression, delamination tensile and compression, as well as fiber-matrix shear modes, and the stiffness degradation of CFRP was achieved after the initial failure of the CFRP using the stiffness reduction rule. The results showed that the bolted joint’s failure process was divided into 3 phases, the linear elastic phase, the damage initiation phase of the CFRP, and the failure phase of the bolted joint. Comparing the simulation and experimental results, the error between them was 6.3% when considering the strength of the joint, indicating the validity of the finite element simulation model. The analysis of the finite element simulation results revealed that during the failure of the bolted joint, the failure of the CFRP occurred in matrix tensile and compression failure modes as well as delamination compression failure mode, and the damage of the aluminum alloy exhibited significant ductility.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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