要寫有限元素法分析程序, 必先要把公式推導好. 有限元的理論跟邊編程是一體的，因為有限元本就是一種計算器方法
這也是在臺灣交大上課的講義, 給大家作參考。
Part01 : 勁度矩陣法 : truss and frame

Part02 : 有限元素法: 彈性力學
CHAPTER 0
STRESS-STRAIN RELATIONSHIP FOR LINEAR ELASTIC MATERIAL
CHAPTER 1
BASIC RELATIONSHIP AND EQUATION FOR ISOTROPIC MATERIAL
CHAPTER 3
EQULIBRIUM EQUATION & STIFFNESS MATRIX
CHAPTER 4
EQUIVALENT NODAL FORCE
CHAPTER 5
SHAPE FUNCTION
CHAPTER 6
TRANSFORMATION OF COORDINATE
CHAPTER 7
TRANSFOMATION OF STIFFNESS MATRIX
CHAPTER 8
NUMERICAL INTEGRATION
CHAPTER 9
SPECIAL ELEMENT FORMULATION
CHAPTER 10
PROGRAMMING PSUEDO CODE AND OTHER SOLUTION PROCEDURE