[材料力学第2讲拉伸与压缩2-2-2、2-3考前复习突击.ppt

第2章主要教学内容 拉压杆的内力、应力； 材料在拉伸与压缩时的力学性能； 拉压强度条件与强度计算； 拉压杆的变形计算； 简单超静定问题； 连接件的强度计算。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 第2讲:$2－1、$2－2 、$2－3 教学基本要求与教学重点与难点： 轴向拉伸（压缩）的概念及实例； 截面法，直杆横截面和斜截面上的应力 【重点】。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 复习 复习绪论 河海大学材料力学\材料力学.exe Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 材料力学问题的分析思路 外力 内力 应力 应变 变形和 位移 几何关系（变形协调） 物理关系（应力应变关系， 变形与外力关系） 静力学平衡方程 强度分析 刚度分析 稳定性分析 超静定问题分析 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. §2-1轴向拉伸与压缩的概念和实例 第2讲——    §2-2轴向拉伸与压缩时横截面上的内力和应力 §2-3轴向拉伸与压缩时斜截面上的应力 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. §2-1 轴向拉压的概念及实例 （Concepts and example problems of axial tension compression） 一、工程实例（ Engineering examples) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 轴向拉伸（压缩）的概念及实例 螺栓连接、桁架中的拉压杆、受压立柱等 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 悬索桥的受拉的悬索与受压的立柱 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 公路与铁路桥梁的受压立柱与拉压桁架 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 拉压问题 火箭发射架－空间桁架 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.