damage

说明：  滞回环面积求解，实验数据中滞回曲线的面积计算，采用MATLAB编写。(Solving the area of hysteresis loop)

abaqus的残余应力数值模拟源文件，适合abaqus新手操作练习使用(ABAQUS source files for numerical simulation of plate constraints, suitable for ABAQUS novice operation exercises)

说明：  黏弹性阻尼器试验设计，方案以及尺寸设计，涉及到相似转换原则(Test Design of Viscoelastic Damper)

说明：  针对轨道动力学，模拟轨道不平顺的matlab编程，对轨道增加不平顺性，美国六级谱(Addition of track irregularity)

说明：  SPI计算程序，标准降水指数的计算，利用将降雨资料可以求得。(Spi calculation program, calculation of standard precipitation index, can be obtained by using rainfall data.)

说明：  精细积分法Matlab程序，利用该程序对动力系统的微分方程精细求解。(The program of precise integration method MATLAB is used to solve the differential equation of dynamic system precisely.)

说明：  ABAQUS摩擦系数子程序，可以用于数值计算(ABAQUS friction coefficient subroutine)

该程序可进行2D和3D恒定流分析，程序中对矩阵含义和比较难理解的部分进行了简要说明(The program can be used for 2 D and 3 D constant flow analysis. The meaning of matrix and the parts that are difficult to understand are briefly explained in the program)

说明：  3维米塞斯屈服准则模型，子程序为vumat，用于abaqus(ABAQUS 3-dimensional Mises yield criterion)

diff 2 for stationary data