欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
热防护材料在高温、高焓、高压环境中因物理、化学和力学因素造成质量损失引起材料烧蚀，使其热力学和热物理性质发生不可逆变化，表现出复杂的非线性特征。通过对碳基复合材料热化学烧蚀机理分析，由质量守恒、能量守恒及系统化学反应的热化学平衡原理，建立相应的热化学和热力学烧蚀模型。基于材料线烧蚀引起边界移动建立热传导方程；对温度场以及热应力场求解时充分考虑材料变物性特征。通过数值模拟表征材料在高温烧蚀条件下的动态热力学行为，与实验结果吻合较好，实现了材料在高温、高过载等复杂因素耦合作用下的实时仿真。
英文摘要：
The mass loss of thermal protection material under the condition of high temperatures, enthalpies and pressures is caused by physical, chemical and mechanical factors and the change of material thermomechanical properties and thermophysical properties at high temperatures is irreversible, showing complex nonlinear characteristics. The present paper is devoted to the development and establishment of corresponding thermochemical and thermomechanical ablative models by analyzing flow and C/C composite materials ablative mechanism. With the help of the conservation law of mass and energy and thermochemical equilibrium of system chemical reaction, the thermal conduct equation is presented based on a moving boundary caused by linear ablation; the mathematical equation is solved numerically by a nonlinear coupling scheme, while the changes of material properties with temperature are considered. The calculated results characterize the dynamic thermomechanical behavior of the material in special environments such as high temperature. This analysis accords well with experimental data. The analysis realizes instantaneous simulation of ablation effected by complex coupling factors of high temperature and load.
同期刊论文项目
同项目期刊论文
Multiscale asymptotic method of optimal control on the boundary for heat equations of composite mate
Two collinear interface cracks between two dissimilar functionally graded piezoelectric/piezomagneti
Investigation the dynamic interaction between two collinear cracks in the functionally graded piezoe
Experimental study on tension and compression mechanical property of 3D fine woven punctured C/C com
Multiscale numerical algorithm for the elliptic eigenvalue problem with the mixed boundary in perfor
Multiscale asymptotic expansion for second order parabolic type equation with rapidly oscillating co
The dynamic behavior of two parallel symmetric cracks in functionally graded piezoelectric/piezomagn
Comparison of two NiCoCrAl/YSZ microlaminates deposited on substrates with different surface roughne
An effective computer generation method for the composites with random distribution of large numbers
Iterated two–scale asymptotic method and numerical algorithm for the elastic structures of composite
A reiterated two-scale probabilistic modeling and numerical simulation for heat equation in a fracta
Using strain energy-based prediction of effective elastic properties in topology optimization of mat
The two-order and two-scale method for heat conduction properties of composite materials with random
Electron Beam-Physical Vapor Deposited TiAl-based Laminated Composite Sheet with Nb Layer Toughening
Progressive damage and nonlinear analysis of 3D four-directional braided composites under unidirecti
The effect of yarn distortion on the mechanical properties of 3D four-directional braided composites
Modeling of Manufacturing Processes of carbon matrices composites and prediction of mechanical prope
Multi-scale analysis for thermo-elasticity properties of composite materials with small periodic con
Effects of microstructure on cavity nucleation in creeping ceramics containing viscous grain boundar
Scattering of harmonic anti-plane shear stress waves by a crack in functionally graded piezoelectric
期刊信息
位置：