论文部分内容阅读
根据ASTM标准设计了复合材料沉头螺栓单钉单搭接头拉伸性能试样,并完成试验件的制备和挤压性能试验。试验过程中采用非接触全场应变测量系统(VIC-3D)对载荷-位移曲线、表面应变场、沉头板上表面面外位移等试验数据进行了采集。基于Abaqus/Standard和Abaqus/Explicit模块建立了复材接头单向拉伸的静力隐式和动力显式三维有限元模型,利用模型搭接区域的变形对试验结果进行验证。采用静力隐式算法所得接头挤压刚度和层合板上表面末端面外位移与试验值的误差分别为14.4%和20.5%;采用动力显式算法所得接头挤压刚度和层合板上表面末端面外位移与试验值的误差分别为13.1%和11.9%。采用动力显式算法精度较高,而且其在接触建模时稳健性很强,可用于后续多钉连接接头以及整体壁板等大型复杂结构建模。
According to the ASTM standard, the tensile properties of composite single-cap screw single-lap joints were designed and the test pieces were prepared and the extrusion performance tests were completed. During the test, the test data of load-displacement curve, surface strain field and displacement on the surface of the submerged plate were acquired by the non-contact whole field strain measurement system (VIC-3D). Based on the Abaqus / Standard and Abaqus / Explicit modules, a static implicit and a dynamic explicit three-dimensional finite element model of uniaxial tensioned composite joint was established, and the deformation of the lapped region was used to verify the experimental results. The error of extrusion stiffness and the displacement between the end surface and the surface of the laminate obtained by the static implicit algorithm are 14.4% and 20.5%, respectively. Using the dynamic explicit method, the extrusion stiffness of the joint and the end surface of the upper surface of the laminate The errors of the outer displacement and the experimental value are 13.1% and 11.9% respectively. The dynamical explicit algorithm has high precision and robustness in contact modeling. It can be used to model large and complex structures such as subsequent multi-nailed connections and integral siding.