Shear forces and bending moments are resultants which are used to conveniently represent the internal forces that develop within a beam when external loads are acting on it. The internal forces that exist within the beam will depend on how the beam is loaded, and how it is supported. Beams are typically loaded by concentrated forces, distributed forces, and concentrated moments. Typical beam supports include pinned supports, roller supports, and fully fixed supports. Determining shear forces and bending moments along the length of a beam typically involves three steps: First, we draw the free body diagram of our beam. Next, we use the equilibrium equations to calculate the reaction forces and moments. Finally, we cut our beam at a single location and use the equilibrium equations to determine the shear force and bending moment at that location. We repeat this process for each location along the beam and draw the result on our shear force and bending moment diagrams. This video is an introduction to shear force and bending moment diagrams.
Type of Material:
Animation (video)
Recommended Uses:
It could be recommended for courses on mechanical properties of materials in mechanics and civil engineering topics. Useful for traditional and hybrid/blended teaching. Lecture and self-paced learning as well as practice review before attempting problems
Technical Requirements:
Mozilla Firefox, Google Chrome and Microsoft Edge browsers were used to access the material. It seems that all facilities are active for any browser.
Identify Major Learning Goals:
Identify different beam supports and create shear and bending moment diagrams.
Target Student Population:
High School, College Upper Division.
Prerequisite Knowledge or Skills:
Basic knowledge of physics.
Content Quality
Rating:
Strengths:
The video presents shear forces and bending moments in relation with the internal forces that develop within a beam when external loads are acting on it. It essentially describes the relationship among concentrated forces, distributed forces, and concentrated moments with the resultants shear forces and bending moments. This video explores a range of different applications. Contents are presented in a clear and concise manner. The contents are core concepts in basic mechanics in engineering courses. Information is provided accurately and summarizes well the main ideas.
Concerns:
None
Potential Effectiveness as a Teaching Tool
Rating:
Strengths:
The material could be used for self-learning as well as a supplementary material in traditional or blended/hybrid courses on basic mechanics. The learning objectives are clearly stated. Physical phenomena and examples concerning the internal forces acting on a beam and the resultants shear forces and bending moments are presented graphically, easy to understand.
Concerns:
As corresponds to video materials, to become useful for effective learning it should be combined with extra exercises and quizzes, or to become integral part of additional lectures on the topic of fluid mechanics.
Ease of Use for Both Students and Faculty
Rating:
Strengths:
The video is a standalone material, easy to use. Only connection to the Internet and link to the video repository is needed. It can be reproduced in computer, iPad and smartphone. Visual design of the video corresponds to a succession of pictures as the explanations are given.
Concerns:
As corresponds to video materials, limited interactivity.
Creative Commons:
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