Beam Cross Section
Beam Cross Section - Related Videos
09:30
Focused Ion Beams
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2023
Source: Sina Shahbazmohamadi and Peiman Shahbeigi-Roodposhti-Roodposhti, School of Engineering, University of Connecticut, Storrs, CT As electron microscopes become more complex and widely used in research labs, it becomes more of a necessity to introduce their capabilities. Focused ion beam (FIB) is an instrument that can be employed in order to fabricate, trim, analyze and characterize materials on mico- and nano-scales in a wide variety of fields from nano-electronics to medicine. FIB...
01:30
Beams
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2023
Beams are integral components of structural engineering and construction, designed to support loads applied at various points along their length. These long, straight members can be classified based on geometry, cross-section, support type, and equilibrium condition. Based on geometry, beams can be straight, tapered, or curved. Straight beams are the most common type and have a constant cross-section throughout their length. Tapered beams, on the other hand, have a varying cross-section along...
07:03
Assessment of Motor Balance and Coordination in Mice using the Balance Beam
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Cited by 395 •
2011
Deficits in fine motor coordination can be assessed with the balance beam test. Performance on the beam is quantified by the speed at which the beam is traversed and the number of times the mouse slips on the beam.
08:45
Genetic Crosses
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2023
To dissect genetic processes or create organisms with novel suites of traits, scientists can perform genetic crosses, or the purposeful mating of two organisms. The recombination of parental genetic material in the offspring allows researchers to deduce the functions, interactions, and locations of genes. This video will examine how genetic crosses were influential in developing Mendel's three laws of inheritance, which form the basis of our understanding of genetics. One genetic crossing...
10:54
Cryo-electron Microscopy Specimen Preparation By Means Of a Focused Ion Beam
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Cited by 5 •
2014
Cryo Electron Microscopes, either Scanning (SEM) or Transmission (TEM), are widely used for characterization of biological samples or other materials with a high water content1. A SEM/Focused Ion Beam (FIB) is used to identify features of interest in samples and extract a thin, electron-transparent lamella for transfer to a cryo-TEM.
FAQs
Material distribution about the neutral axis controls the second moment of area, which governs bending stiffness and resistance to deflection. Increasing the effectiveness of that distribution can improve performance without simply increasing total area. This relationship explains why two sections with similar area may behave differently under bending and why geometry is central to efficient beam design.
Cross-sectional area primarily affects axial stress and contributes to the beam’s weight, whereas shape determines how effectively material is distributed for bending. Engineers therefore cannot select a section by area alone. Comparing both characteristics helps balance load-carrying requirements, stiffness, resistance to deflection, and material use in a structural member.
Geometry affects more than axial and bending performance. The arrangement of material in a beam cross section also influences shear stress and buckling behavior, so a section that performs well in one loading condition may not be suitable in another. Engineers consider these responses together to support structural stability rather than optimizing only one strength or stiffness measure.
These shapes provide different balances among strength, stiffness, stability, manufacturability, and material use. An I-shaped section, box section, rectangular section, or circular section may therefore be preferred depending on the required structural behavior and design constraints. The comparison is not based on shape alone; engineers evaluate how each geometry distributes material and responds to expected loading.
Selection begins with the member’s required load-carrying behavior and then compares area, material use, bending stiffness, resistance to deflection, shear response, and buckling behavior. Manufacturability and stability also influence the decision. Evaluating these factors together allows engineers to choose a geometry that meets performance needs without treating strength, weight, or construction practicality as isolated concerns.
Engineers apply varied cross-sectional geometries in structural frames, bridges, machines, and lightweight aerospace designs. Each setting may require a different balance of stiffness, stability, strength, manufacturability, and material efficiency. The selected section affects how the member carries loads and supports the broader design objectives of the structure or machine.
Lightweight aerospace designs must balance structural performance with material use and weight. Cross-section selection supports that balance by combining area-related effects with geometry-dependent bending stiffness, deflection resistance, shear behavior, and buckling considerations. Comparing alternative sections helps engineers pursue a member that remains effective under loading while avoiding unnecessary material in the overall design.