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Updated: Jun 28, 2026

Application of Design Aspects in Uniaxial Loading Machine Development

Application of Design Aspects in Uniaxial Loading Machine Development

Published on: September 19, 2018

A device for performing whole bone torsional testing in a single-axis linear motion testing machine.

J M Tyler¹, W Larinde, S H Elder

¹Department of Biological Sciences, New Jersey Institute of Technology, Newark, New Jersey, USA.

Veterinary and Comparative Orthopaedics and Traumatology : V.C.O.T

|November 18, 2008

Summary

A novel, inexpensive fixture converts linear motion to rotational motion, enabling torsional property testing of canine tibiae using standard universal testing machines. This device facilitates mechanical evaluation of bone healing interventions.

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Last Updated: Jun 28, 2026

Application of Design Aspects in Uniaxial Loading Machine Development

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Published on: September 19, 2018

A Novel Biaxial Testing Apparatus for the Determination of Forming Limit under Hot Stamping Conditions

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Method to Measure Tone of Axial and Proximal Muscle

Method to Measure Tone of Axial and Proximal Muscle

Published on: December 14, 2011

Area of Science:

Biomechanics
Orthopedic Research
Materials Science

Background:

Assessing bone mechanical properties, particularly torsional strength and stiffness, is crucial for evaluating fracture healing.
Traditional torsional testing requires expensive biaxial servohydraulic machines, limiting accessibility for many researchers.
Universal tension-compression testing machines are more widely available, presenting an opportunity for adapted testing methods.

Purpose of the Study:

To design and validate a cost-effective device for converting linear motion to rotational motion.
To enable torsional property determination of canine tibiae using a universal tension-compression testing machine.
To provide an accessible method for evaluating bone mechanical properties after interventions.

Main Methods:

A custom fixture with a cable-pulley system and a guide block-rail assembly was developed.
Ten whole canine tibiae were tested to failure in torsion at a rate of 1 degree per second.
The fixture was integrated with a standard universal tension-compression testing machine.

Main Results:

The device successfully induced spiral fractures in all tested canine tibiae.
The mean torsional strength was determined to be 13.9 ± 1.4 N m.
The mean torsional stiffness was measured at 0.53 ± 0.07 N m/degree.

Conclusions:

The developed fixture offers an inexpensive solution for torsional testing of long bones.
This device allows for the evaluation of mechanical properties using commonly available universal testing machines.
The fixture can be adapted for various single-axis linear motion testing machines, broadening its applicability in orthopedic research.