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Related Concept Videos

Impact Loading01:19

Impact Loading

594
Impact loading occurs when a moving object collides with a stationary structure, such as a rod with a uniform cross-sectional area fixed at one end. Under these conditions, the rod absorbs the kinetic energy from the striking object, leading to deformation and subsequent stress development. As the rod returns to its original position and reaches maximum stress, the absorbed energy, initially manifested as kinetic energy, transforms entirely into strain energy.
In cases of elastic deformation,...
594
Impact Loading on a Cantilever Beam01:13

Impact Loading on a Cantilever Beam

784
The analysis of a cantilever beam with a circular cross-section subjected to impact loading at its free end illustrates the conversion of potential energy from a dropped object into kinetic energy, which is then absorbed by the beam as strain energy. This process is crucial for understanding how materials behave under dynamic loads, which is important in fields such as construction and aerospace.
When an object is dropped onto the free end of a cantilever, its potential energy due to gravity is...
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Unsymmetric Loading of Thin-Walled Members01:23

Unsymmetric Loading of Thin-Walled Members

336
Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
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Mechanical Characteristics of Steel01:18

Mechanical Characteristics of Steel

967
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
967
Internal Loadings in Structural Members: Problem Solving01:28

Internal Loadings in Structural Members: Problem Solving

1.6K
When designing or analyzing a structural member, it is important to consider the internal loadings developed within the member. These internal loadings include normal force, shear force, and bending moment. Engineers can ensure that the structural member can support the applied external forces by calculating these internal loadings.
To illustrate this, let's consider a beam OC of 5 kN, inclined at an angle of 53.13° with the horizontal and supported at both ends. Determine the internal...
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Stress Concentrations01:24

Stress Concentrations

560
Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller...
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Related Experiment Video

Updated: Dec 29, 2025

Finite Element Modeling for the Simulation of the Quasi-Static Compression of Corrugated Tapered Tubes
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Study of Mild Steel Sandwich Structure Energy Absorption Performance Subjected to Localized Impulsive Loading.

Nouman Alqwasmi1, Faris Tarlochan1,2, Sami E Alkhatib3

  • 1Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, P.O. 271, Doha, Qatar.

Materials (Basel, Switzerland)
|February 8, 2020
PubMed
Summary

Sacrificial sandwich panels with octagonal tapered tubular cores effectively mitigate blast loads. Panel thickness significantly impacts energy absorption and efficiency, with thicker plates showing superior performance.

Keywords:
compression blast loadingfinite element analysismild steelsandwich structurethin-walled tube

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Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Structural Engineering

Background:

  • Sacrificial sandwich panels are crucial for mitigating blast loads.
  • Their load distribution and energy absorption capabilities are well-researched.
  • This study focuses on specific panel designs under impulsive blast conditions.

Purpose of the Study:

  • To investigate the blast behavior of sacrificial sandwich mild steel panels with axially oriented octagonal tapered tubular cores.
  • To analyze deformation modes and key performance parameters under near-field impulsive blast.
  • To evaluate the influence of geometric parameters on panel effectiveness.

Main Methods:

  • Validated finite element analysis (FEA) was employed.
  • Deformation behavior, peak force, stroke efficiency, energy absorption, and core efficiency were assessed.
  • The study examined panels with varying top plate and tube thicknesses, and taper angles.

Main Results:

  • Deformation modes were primarily influenced by top plate and tube thickness.
  • Tubes with a 5° taper showed unfavorable results, with increased peak force and reduced energy absorption.
  • Panels with 4 mm top plate thickness demonstrated higher stroke efficiency.
  • Thicker plates resulted in a 73.5% increase in core efficiency compared to thinner plates.

Conclusions:

  • Top plate and tube thickness are critical factors for energy absorption in these panels.
  • Optimizing panel thickness is essential for enhancing blast mitigation performance.
  • The study provides valuable insights for designing more effective sacrificial sandwich panels for blast protection.