COURSE EXPANSION FOR FATIGUE PROBLEM IN THE COURSE OF MECHANICS OF MATERIALS BASED ON ONLINE COURSE

随着网络化的发展,在线课程平台正起着举足轻重的作用。在课程学时被大量压缩的情况下,基于在线课程平台,以扩展阅读的形式对书本知识 进行拓展正受到广泛重视。本文以工科专业重要学习内容——疲劳问题为例,基于在线课程平台将教材中金属材料在稳定交变载荷下的疲劳问 题,拓展到不稳定载荷下金属材料疲劳及非金属材料的疲劳问题,并通过实例给出疲劳寿命估算公式。利用在线平台整合资源、拓展知识,对培 养学生分析和解决问题能力具有重要作用。     

飞机机翼损伤的气动模型及故障诊断研究简

为了确保机翼损伤后飞机的飞行安全，提出了一种在线的故障诊断方法. 首先，根据输入输出特性，采用遗忘因子递推最小二乘法对飞机故障后的气动导数进行辨识，建立了机翼损伤故障的数学模型；然后，结合多模型方法和中心差分卡尔曼滤波器（central difference Kalman filter，CDKF）各自的优点，实现对机翼损伤的故障诊断，并采用强跟踪滤波器在线更新CDKF 的采样点，以增强CDKF 的自适应能力. 最后，通过仿真结果验证了本文所提方法的有效性.     

Hyperbolicity region in extended thermodynamics with 14 moments

Received May 30, 2000 / Published online January 23, 2001     

A family of exact solutions in Relativistic Extended Thermodynamics

Received December 7, 2001 / Published online April 10, 2002     

Hardening rules for finite deformation micropolar plasticity: Restrictions imposed by the second law of thermodynamics and the postulate of Il'iushin

Received April 9, 2001 / Published online August 16, 2001     

A thermo-mechanically coupled test case for axi-symmetric ice sheet flow

Received April 17, 2000 / Published online April 18, 2001     

Mathematical modeling of electrorheological materials

Received May 11, 2000 / Published online January 23, 2001     

Dispersion and absorption of plane harmonic waves in a relativistic gas

Received October 10, 2000 / Published online June 1, 2001     

Generalized strain and stress tensors associated by duality

Received April 23, 2001 / Published online August 16, 2001     

Configurational forces in magnetism with application to the dynamics of a small-scale ferromagnetic shape memory cantilever

Received October 11, 2001 / Published online February 4, 2002     

Influence of lattice distortion on fabric evolution in polar ice

Received June 18, 2001 / Published online February 4, 2002     

Finite viscoelasticity of filled rubbers: the effects of pre-loading and thermal recovery

Received October 17, 2001 / Published online February 28, 2002     

Incompressibility conditions in liquid crystals

Received January 2, 2002 / Published online May 21, 2002     

The onset of convection in the Rayleigh-Bénard problem for compressible fluids

Received August 14, 2000 / Published online January 23, 2001     

A modified Zener model of a viscoelastic body

Received April 18, 2001 / Published online February 28, 2002     

Grad's distribution functions in the kinetic equations for a chemical reaction

Received September 18, 2001 / Published online February 28, 2002     

Axisymmetric configurations of bipolar liquid crystal droplets

Received July 4, 2001 / Published online April 10, 2002     

Complex backflow dynamics in nematic liquid crystals

Received December 31, 2001 / Published online May 21, 2002     

A historical note on the entropy principle of Müller and Liu

Received July 12, 2001 / Published online February 28, 2002     

Experimental and numerical investigations on the pure material instability of an Oldroyd's 3-constant model

Received March 25, 2001 / Published online November 15, 2001