Effect of strain rate and grip technique on the biomechanical properties of tendon
Foo, Jing Wan.
Date of Issue2009
School of Mechanical and Aerospace Engineering
The objective of this experiment is to study the effect of strain rate and grip technique on the biomechanical properties tendon. 100 avian flexor digitorium profundus specimens were used in this experiment. Six different gripping methods using inexpensive material linings were tested while subjecting to a constant strain rate of 50 mm/min. After which strain rates at 0.1 mm/min, 50 mm/min, 200mm/min and 500 mm/min using single layer paperboard grip were tested to see its effect on the tensile parameters of tendons. In addition, location of failure analysis based on clamp failure and midsubstance failure was studied to understand the reliability of the test results. The results show that different gripping techniques significantly affect the ultimate tensile strength and elastic modulus. Pneumatic grips lined with single layer paperboard fetches the highest ultimate tensile strength of 50.997±8.45MPa. On the contrary, double layer paperboard lining did not further improve its grip performance even though increasing its cushioning effect. The increase in strain rates has significant effect on the increase in ultimate tensile strength and elastic modulus while the strain at UTS remains constant. The shape of the stress-strain curve is not affected as well. Grip failure and midsubstance failure shows no significant deviation in the tensile properties. All test results were considered valid regardless of where it fails.
Final Year Project (FYP)
Nanyang Technological University