Related Experiment Video
Updated: Apr 7, 2026
05:23
Application of Design Aspects in Uniaxial Loading Machine Development
Published on: September 19, 2018
6.5K
Quantification of loading in biomechanical testing: the influence of dissection sequence
Martha Funabashi1, Marwan El-Rich2, Narasimha Prasad3
1Department of Physical Therapy, University of Alberta, Edmonton, AB, Canada.
Journal of Biomechanics
|July 9, 2015
Summary
The order of removing structures in robotic testing significantly impacts measured loads on biological tissues. This highlights the importance of considering dissection sequence in biomechanical studies of joint loading.
Area of Science:
- Biomechanics
- Orthopedics
- Robotics
Background:
- Sequential dissection is a common method for studying joint tissue loads.
- Unconstrained testing leads to kinematic changes with tissue removal.
- Robotic systems constrain joint kinematics but may yield order-dependent results.
Purpose of the Study:
- To evaluate if robotic testing of structure loading is dependent on the removal order of connecting structures.
- To investigate the influence of nonlinear, time-dependent material properties on dissection sequence outcomes.
Main Methods:
- Six identical 3D-printed models with nonlinear viscoelastic connecting structures were used.
- Pure rotations were applied using a parallel robot to constrain joint kinematics.
- A unique dissection sequence was applied to each model, with robotic testing after each step.
Main Results:
- A statistically significant difference (p<0.05) was observed in the moments experienced by structures across different removal sequences.
- The study demonstrated that the sequence of structure removal influences model loading.
Conclusions:
- Robotic testing of joint loading is dependent on the order of tissue or structure removal, even with constrained kinematics.
- Findings suggest that tissue loads derived from robotic testing are specific to the dissection sequence used.
- This emphasizes the need to account for removal order in biomechanical analyses of biological tissues.
Related Concept Videos
01:19Impact Loading
877
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,...
In cases of elastic deformation,...
877
01:15Stress: General Loading Conditions
687
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
687
01:22Generalized Hooke's Law
3.2K
The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
3.2K
01:20Normal Strain under Axial Loading
1.6K
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
1.6K
01:29Load along a Single Axis
696
In structural engineering, the analysis of beams subjected to varying loads is a critical aspect of understanding the behavior and performance of these structural elements. A common scenario involves a beam subjected to a combination of different load distributions.
Consider a beam of length L subjected to a varying load, which is a combination of parabolic and trapezoidal load distribution along the x-axis. In this case, it is essential to determine the resultant loads, their locations, and...
Consider a beam of length L subjected to a varying load, which is a combination of parabolic and trapezoidal load distribution along the x-axis. In this case, it is essential to determine the resultant loads, their locations, and...
696