Effects of time-varying liquid bridge forces on rheological properties,and resulting extrudability and constructability of three-dimensional printing mortar

作     者：Peng ZHI Yu-Ching WU Timon RABCZUK Peng ZHI;Yu-Ching WU;Timon RABCZUK

作者机构：Department of Structural EngineeringTongji UniversityShanghai 200092China Institute of Structural MechanicsBauhaus University of WeimarWeimar 99423Germany 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2023年第17卷第9期

页      面：1295-1309页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：sponsored by the National Natural Science Foundation of China (Grant Nos.52178299 and 51325802) 

主　　题：particle-based simulation liquid bridge force rheological property 3D printing mortar extrudability constructability 

摘      要：Extrudability and constructability are two important,yet contradictory issues pertaining to the construction of three-dimensional(3D)printing *** is easily achieved when 3D printing cement mortar has a high water content and low cohesion,but the printed structure is easily ***,a 3D printing cement mortar with a low water content and high cohesion has a relatively stable printed structure although the cement mortar might not be *** study proposes a particle-based method to simulate 3D printing mortar extrusion and construction as an overall planning tool for building ***,a discrete element model with time-varying liquid bridge forces is developed to investigate the microscopic effects of these forces on global rheological ***,a series of numerical simulations relevant to 3D printable mortar extrudability and constructability are carried *** study demonstrates that the effects of time-varying liquid bridge forces on rheological properties and the resulting extrudability and constructability of 3D printing mortar are ***,an optimized region that satisfies both the extrusion and construction requirements is provided for 3D printing industry as a reference.