Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Stability of structures

Stability of structures

In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...

Stresses under Combined Loadings

Stresses under Combined Loadings

When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...

Static Equilibrium - II

Static Equilibrium - II

Static equilibrium is a special case in mechanics that is very important in everyday life. It occurs when the net force and the net torque on an object or system are both zero. This means that both the linear and angular accelerations are zero. Thus, the object is at rest, or its center of mass is moving at a constant velocity. However, this does not mean that no forces are acting on the object within the system. In fact, there are very few scenarios on Earth in which no forces are acting upon...

Applications of Stress

Applications of Stress

Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...

Stability of Equilibrium Configuration: Problem Solving

Stability of Equilibrium Configuration: Problem Solving

The stability of equilibrium configurations is an important concept in physics, engineering, and other related fields. In simple terms, it refers to the tendency of an object or system to return to its equilibrium position after being disturbed. The stability of an equilibrium configuration can be analyzed by considering the potential energy function of the system and examining its behavior near the equilibrium point.
Problem-solving in the context of the stability of equilibrium configuration...

Indeterminate Structure

Indeterminate Structure

Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium. Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and some...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

<i>Globisporangium</i> and <i>Pythium</i> Species Associated with Yield Decline of Pyrethrum (<i>Tanacetum cinerariifolium</i>) in Australia.

Plants (Basel, Switzerland)·2023

Same author

<i>Colletotrichum</i> Species Causing Anthracnose of Citrus in Australia.

Journal of fungi (Basel, Switzerland)·2021

Same author

Identification, prevalence and pathogenicity of <i>Colletotrichum</i> species causing anthracnose of <i>Capsicum annuum</i> in Asia.

IMA fungus·2020

Same author

Inheritance of breeding system in Cakile (Brassicaceae) following hybridization: implications for plant invasions.

Annals of botany·2019

Same author

Population Structure of <i>Colletotrichum tanaceti</i> in Australian Pyrethrum Reveals High Evolutionary Potential.

Phytopathology·2019

Same author

Comparative genome analysis indicates high evolutionary potential of pathogenicity genes in Colletotrichum tanaceti.

PloS one·2019

Search research articles

Related Experiment Video

Updated: Jun 1, 2026

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Mechanical stability of trees under dynamic loads.

Kenneth R James¹, Nicholas Haritos, Peter K Ades

¹School of Resource Management, Faculty of Land and Food Resources, University of Melbourne, Melbourne, Australia, 3001;

American Journal of Botany

|June 7, 2011

Summary

Tree stability in windstorms is complex. Branch mass provides dynamic damping, reducing sway and increasing mechanical stability, crucial for urban and forest trees.

More Related Videos

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Published on: July 3, 2020

Laboratory and Field Protocol for Estimating Sheet Erosion Rates from Dendrogeomorphology

Laboratory and Field Protocol for Estimating Sheet Erosion Rates from Dendrogeomorphology

Published on: January 7, 2019

Related Experiment Videos

Last Updated: Jun 1, 2026

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Published on: July 3, 2020

Laboratory and Field Protocol for Estimating Sheet Erosion Rates from Dendrogeomorphology

Laboratory and Field Protocol for Estimating Sheet Erosion Rates from Dendrogeomorphology

Published on: January 7, 2019

Area of Science:

Arboriculture
Structural Engineering
Biophysics

Background:

Tree stability in windstorms is critical for urban safety and forest economics.
Current tree management relies on visual assessment, lacking dynamic load data.
Static load estimation methods do not fully capture tree responses to wind.

Purpose of the Study:

To investigate dynamic wind loads on trees with diverse structures.
To develop a dynamic model for assessing tree stability under wind.
To understand the role of branch mass in mitigating wind-induced sway.

Main Methods:

Measured dynamic wind loads and sway motion on various tree species over 12 months.
Developed a new dynamic tree model incorporating trunk and branch structural properties.
Analyzed the complex, non-harmonic sway patterns resulting from branch interactions.

Main Results:

Tree sway is complex due to dynamic branch interactions, not simple harmonic motion.
Branch mass was identified as a key factor providing "mass damping."
Mass damping significantly reduces trunk sway, minimizing loads and enhancing mechanical stability.

Conclusions:

Dynamic modeling provides a more accurate assessment of tree stability than static methods.
The "mass damping" effect of branches is vital for tree resilience in windstorms.
Understanding these dynamics can improve tree management and reduce wind damage risks.