US 12,481,808 B2
Optimized designing method for laminate preform of ceramic matrix composite
Xiguang Gao, Jiangsu (CN); Chenyang Liu, Jiangsu (CN); Yingdong Song, Jiangsu (CN); Sheng Zhang, Jiangsu (CN); Hongnian Dong, Jiangsu (CN); Guoqiang Yu, Jiangsu (CN); Chengqian Dong, Jiangsu (CN); Chao You, Jiangsu (CN); and Lu Zhang, Jiangsu (CN)
Assigned to NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS, Jiangsu (CN)
Appl. No. 17/603,281
Filed by NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS, Jiangsu (CN)
PCT Filed Jul. 8, 2021, PCT No. PCT/CN2021/105170
§ 371(c)(1), (2) Date Oct. 12, 2021,
PCT Pub. No. WO2022/037305, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 202010846564.2 (CN), filed on Aug. 20, 2020.
Prior Publication US 2022/0309213 A1, Sep. 29, 2022
Int. Cl. G06F 30/23 (2020.01); G06F 111/10 (2020.01); G06F 113/26 (2020.01)
CPC G06F 30/23 (2020.01) [G06F 2111/10 (2020.01); G06F 2113/26 (2020.01)] 10 Claims
OG exemplary drawing
 
1. An optimized designing method for a laminate preform of a ceramic matrix composite, comprising:
step 1: creating, based on a strength analysis result of a macroscopic model of a ceramic matrix composite component, a preliminary design solution to a laminate preform structure;
step 2: carrying out finite element strength analysis on the laminate preform structure in step 1, to obtain corresponding first principal stress, normal stress and shear stress of each finite element unit;
step 3: calculating, according to a stress result obtained in step 2, an included angle between the first principal stress of each finite element unit and a reference rectangular coordinate system;
step 4: utilizing the included angle of each finite element unit obtained in step 3 to change an element coordinate system of each finite element unit, such that a material principal direction of each finite element unit is consistent with a direction of the first principal stress;
step 5, utilizing a rule of mixture for a composite to calculate a material parameter of each finite element unit;
step 6: carrying out, according to the material parameter of each finite element unit obtained in step 5, strength analysis on the laminate preform structure in step 1 again, and returning to step 1 to redesign the laminate preform structure when a strength requirement is not met; and
step 7: selecting, according to a transverse strength calculation formula of the rule of mixture for a composite in conjunction with a strength analysis result obtained in step 6, an appropriate microscopic structure type for each laminate.