Method for predicting structural fracture and deformation in additive manufacturing process

The invention discloses a method for predicting structural fracture and deformation in an additive manufacturing process, which comprises the following steps of: 1, establishing a thermal elastic-plastic model under corresponding process parameters, and acquiring a temperature field distribution result and a stress field distribution result; 2, extracting a corresponding averaging inherent strain vector according to the thermoelastic-plastic model established in the step 1; 3, according to the inherent strain vector in the step 2, predicting stress deformation distribution of the structure by utilizing an inherent strain method, and pre-judging a dangerous section position where a fracture occurs; and 4, according to the structural stress deformation distribution result in the step 2, a cohesion model is established, and visual prediction of structural fracture deformation in the additive manufacturing process is carried out. According to the prediction method, visual prediction of structural fracture deforma