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所在平台: Udemy |
课程主页: https://www.udemy.com/course/basic-concepts-of-mechanics-of-materials-for-machine-design/
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**课程名称：** 机械设计中的材料力学基础概念 **课程概述：** 本课程着重于机械设计中至关重要的材料力学基础概念。材料力学是机械工程的核心课程，广泛应用于结构和机器的设计。无论是设计承受载荷的单个结构，还是涉及动态载荷的复杂传动系统，对材料力学基本概念的深刻理解都是衡量工程设计能力的关键。本课程旨在为学习者打下坚实的理论基础，而非仅仅教授公式的应用。 **核心内容包括：** * **机械设计入门：** 探讨机械设计的本质、涵盖范围以及工程设计的过程。 * **强度分析的重要性：** 区分强度与应力，并阐述强度分析在机械设计中的关键作用。 * **工程静力学基础：** 讲解静力学方法、自由体图、力的平衡、基本连接类型以及法向和剪切应力等基本概念，并解释轴承应力的含义。 * **应力与应变关系：** 通过拉伸试验深入分析应力与应变的关系，介绍抗拉强度和屈服强度等定义，并讲解胡克定律。 * **剪切应力与扭转：** 阐述剪切应力-应变关系，以及轴在扭矩作用下的剪切状态（扭转）以及泊松比。 * **轴向加载构件分析：** 分析轴向加载构件中的应力，并讲解应力集中现象。 * **斜截面应力分析：** 探讨轴向加载构件在斜截面上的应力分布。 * **纯弯曲理论：** 讲解纯弯曲的概念，推导其控制方程，并解释面积惯性矩。 * **梁的分析：** 详解梁的受力分析，并推导剪力图和弯矩图。 * **双向弯曲与应力集中：** 分析轴的双向弯曲以及弯曲过程中的应力集中。 * **轴的扭转分析：** 推导轴在扭矩作用下的功率传递控制方程，对比实心轴与空心轴的差异，并讲解轴的应力集中。 * **多轴加载与体积变化：** 讨论多轴加载下的应力状态、体积变化和体积模量。 * **应力状态与转换：** 讲解应力状态的概念以及应力转换的原理。 * **薄壁压力容器分析：** 分析薄壁压力容器的应力状况。 * **主应力与摩尔圆：** 介绍主应力概念，并推导摩尔圆，比较主应力平面与最大剪应力平面的关系。 **课程目标：** 本课程旨在为学员提供设计标准结构和机械元件所需的理论基础。课程强调对基本概念的深入理解和掌握，鼓励学员理解每种公式背后的假设，从而为有效的工程设计奠定扎实的数学基础。
Mechanics of Materials is the primary course for mechanical engineering and is used in the design of structures and machines. A thorough understanding of the foundational concepts of the subject is important to for mechanical design whether it be designing a single structure which has to take loads or whether it is designing an elaborate Transmission systems which is undergoing dynamic loading conditions. Mechanics of materials concepts are cornerstone of any type of mechanical design.In this course we will be covering the following concepts:Introduction to Machine design - What is nature of machine design ? What does it include ? What is the engineering design process?Importance of analysis of strength and difference between strength and stressEssential basics of engineering statics - Method of statics, Free body diagrams, Force equilibrium , types of joints primary types of loading- Normal and shear What is Bearing stressExplanation of Stress and strain relations with Tensile test and its inferences along with definitions of tensile strength , yield strength.Hookes lawShear Stress strain relations and Shear stress in Shafts undergoing action of torque- Torsion. What is Poissons' Ratio Analysis of Axially loaded member and what is stress concentrationAnalysis of Stress in Oblique plane for axially loaded memberWhat is Pure bending ? Derivation of governing equations.What is Area moment of InertiaAnalysis of Beams and deriving shear force and Bending moment diagramsTwo Plane bending in shaftsStress concentration in BendingAnalysis of Shaft in torsion and derivation of Governing equationsSolid vs Hollow shaftsStress concentration in ShaftsMulti axial Loading , Dilatation and Bulk ModulusState of Stress and Stress transformationsAnalysis of Thin walled pressure vesselsWhat is Principal stress and derivation of Mohrs' CircleComparison of plane of Principal stress and Maximum Shear The course covers the Theoretical basics required to design standard elements in structures and machines. Aim of the course is to build a strong well rooted understanding of the concepts rather than just mere application of formulae.A good engineer knows the underlying assumptions of each formula they use in application and hence knowing the mathematical back ground is very important for effective design.
