PP-ECC uniaxial compression constitutive model establishing method

• Main Authors: WEI ZHIQIANG, GU JIAWANG, TAN GUOJIN, WANG YONGJUN, ZHAO YONGCHAO, WANG WENSHENG, WANG XIAOBING, ZHAO JING, LI HANJUN, WANG FUEN
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to a PP-ECC uniaxial compression resistance constitutive model establishment method, and belongs to the technical field of constitutive model establishment. The establishment method comprises the following steps: (1) preparing N kinds of PP-ECC test pieces with different polypropylene fiber contents, (2) respectively carrying out uniaxial compression resistance tests to obtain a stress-strain curve of the PP-ECC material; and (3) fitting the stress-strain curve based on the uniaxial compression-resistant constitutive model to obtain correlation coefficients, p1, p2, p3, p4 and p5, and completing construction of the uniaxial compression-resistant constitutive model. According to the construction method, deformation and damage characteristics of each stage in the stress process of the PP-ECC structure can be comprehensively analyzed, a basis is provided for research and simulation of the stress performance of the PP-ECC structure, the construction method is a basis for elastic-plastic anal