CAJ | 학술논문

采用不同网格密度、不同线速度对Q235立柱板冷弯成形过程进行ABAQUS有限元模拟，结果表明，网格的疏密程度相差1倍时，密网格情况下若辊子初始咬入阶段轧制力大些，可提高冷弯过程的稳定性。在不同速度下，网格越细，各道次的轧制力越大，但变化幅度不大，且网格的细化降低了应力集中。密网格下的模拟结果与理想状况更接近，但计算时间较长。当速度为10 m/min、12 m/min时，出现褶皱和挠曲现象，不能顺利完成冷弯过程；当速度为6 m/min时，成形结果十分接近理想形状，但效率较低；当速度为8 m/min时，成形结果接近理想状态，是冷弯成形的适宜速度。
채용불동망격밀도、불동선속도대Q235립주판랭만성형과정진행ABAQUS유한원모의，결과표명，망격적소밀정도상차1배시，밀망격정황하약곤자초시교입계단알제력대사，가제고랭만과정적은정성。재불동속도하，망격월세，각도차적알제력월대，단변화폭도불대，차망격적세화강저료응력집중。밀망격하적모의결과여이상상황경접근，단계산시간교장。당속도위10 m/min、12 m/min시，출현습추화뇨곡현상，불능순리완성랭만과정；당속도위6 m/min시，성형결과십분접근이상형상，단효솔교저；당속도위8 m/min시，성형결과접근이상상태，시랭만성형적괄의속도。
The cold bending processes of Q235 column plates at different linear velocities are investigated using ABAQUS based fi-nite element simulation with different grid densities . The simulation results show that the initial rolling force is larger when the grid density becomes double to improve the stability of cold bending process . This change tendency of rolling force is similar for different rolling speeds . Furthermore , the mesh refinement results in the reduction of the stress concentration . The simulation results under the dense grid agree well with the ideal conditions .However ,a longer computation time is needed .At the speeds of 10m/min and 12m/min ,the corrugation and flexure occur ,which leads to the termination of bending .As the speed is reduced to 6m/min ,the simulated results agree well with the ideal shape ,which shows low calculation efficiency .When the speed of 8m/min is employed ,the simulated results agree with the ideal condition within the engineering application errors .