The development of a numerical method for fissure formation during the carbonization of coke is needed because the formed fissures determine the coke’s particle size. In this study, we proposed and developed a novel numerical method that can represent initiation, extension, and branching of multiple cracks. Fundamental tests (i.e., bending of a beam, stress analysis of a center crack plate, and crack propagation in a plate under tensile loading) were performed using the proposed method. The test results showed that the numerical accuracy of stress analysis and the fracture analysis using the proposed method were high and were comparable to other standard numerical methods. Furthermore, we applied the proposed method for the coupled analysis of heat conduction and thermal stress and performed numerical simulations for the formation of fissures in coke during carbonization. The numerical simulation results showed that major fissures extended in a linear direction, perpendicular to the direction of an oven wall. And the numerical results reflected qualitative features of an actual coke-making process using a chamber oven. Therefore, the proposed method could be used to reproduce the formation of fissures in coke during the carbonization process.

由于形成的裂缝决定了焦炭的粒径，因此需要开发一种在焦炭碳化过程中形成裂缝的数值方法。在这项研究中，我们提出并开发了一种新颖的数值方法，可以表示多个裂纹的萌生，扩展和分支。基础测试（即使用所提出的方法进行梁的弯曲，中心裂纹板的应力分析以及在拉伸载荷下板中的裂纹扩展）。测试结果表明，采用该方法进行应力分析和断裂分析的数值精度较高，可与其他标准数值方法相媲美。此外，我们将提出的方法用于热传导和热应力的耦合分析，并对碳化过程中焦炭中裂缝的形成进行了数值模拟。数值模拟结果表明，主要裂缝沿垂直于炉壁方向的线性方向延伸。数值结果反映了使用室内烘箱进行实际炼焦过程的定性特征。因此，