I Introduction Silicates are compounds that mainly composed of [sio4]. It is the essential components of most rock and soil, such as quartz, feldspar, mica etc

1. The structure of am b differs from those of either a or B 2. Its composition is variable to more or lessextension 3. Mixed bonding 4. Intermediate properties

第6章钢结构的正常使用极限状态 第7章钢结构的连接和节点构造(1)

教学目的、要求(分掌握、理解、了解三个层次): 掌握对接焊缝的构造和计算 掌握角焊缝连接的特性和计算

3.2扭转试验 3.2.1应力应变分析

6.1前言 1、广义的“切口 切口的存在造成:应力应变集中和多向性。 二战事故分析的结论:

第一节力腐蚀断裂 第二节氨脆

8.1绪言 8.2金属在对称循环应力下的疲劳八金属的

7.1前言 7.2裂纹的应力分析 7.3裂纹扩展力或裂纹扩展的能量释放率

1.2 Atomic bonding Bonding forces and energies FF net force attractive force repulsive force