功能梯度混凝土梁热断裂问题的分层有限元法研究

Thermal Fracture Analysis of Functionally Graded Concrete Beams Based on Layered Finite Element Method

功能梯度混凝土(Functionally Graded Concrete,简称FGC)属新型复合建筑材料,其组分和性质在空间上呈梯度连续变化。本文基于ANSYS有限元软件和分层模型开展FGC梁的稳态热断裂问题研究,通过一个典型算例验证了分层有限元法的收敛性及计算精度,并在此基础上进一步分析了梯度形式、梯度参数及裂纹几何形态等对FGC梁热断裂行为的影响规律,相关结果可为FGC梁的组分设计提供一定的参考。

Functionally graded concrete(FGC)is a new type of composite building material.Its components and properties change continuously in space.In this paper,the steady-state thermal fracture of FGC beams is studied based on the finite element software ANSYS with a layered model.The convergence and calculation accuracy of layered finite element method are verified through a typical example.On this basis,the effects of gradient form,gradient parameters and crack shape on the thermal fracture behavior of FGC beams are further analyzed.The related findings may provide some supports for the component determination of FGC beams.