Experimental Study of Variation between Quasi-static and Dynamic Load Deformation Properties of Bovine Medial Collateral Ligaments

Abstract

In a significant number of automobile crashes involving pedestrians, the knee ligament which controls the stability of the knee often get severely loaded. In lateral impact on knee during automotive crashes, varus-valgus deformities result in failure of ligament by avulsion or rupture. Varus-valgus deformity strains occur mainly in the middle region of ligament and it is known that properties vary in the different regions of the ligament. Experimental measurement of tensile-load elongation behavior of bovine middle region medial collateral ligament properties between strain rate 0.0001/s to 161/s are reported here. The results shows a linear stress-strain response at lower strain rate whereas it is nonlinear and strain rate sensitive in dynamic loading conditions. The objective of this study is to establish a methodology to identify the quasi-static and dynamic properties of ligaments.

Finite element analysis (FEA) of femur to predict biomechanical properties and its validation

“…11 However, the accuracy of the finite element (FE) method and the influence of different femur inclination on mechanical response in standing configuration need to be improved. Some studies have used the most common animal species such as cattle, 12,13 dog, 14,15 pig, 16 goat, 17 rat, 18 sheep [19][20][21][22][23] to evaluate biomechanical properties. In another study, the experimental method has been used to predict strain and fracture load in sheep femur.…”

Dynamic Tensile Response of Caprine Muscles Using Split Hopkinson Pressure Bar

“…The available quantitative data on the mechanical response of biological soft tissues is mostly limited to quasi-static strain rates (< 0.1s -1 ) [1][2][3][4]. The response of soft tissues at intermediate strain rates (> 5s -1 ) have also been studied for bovine medial collateral ligament [2], human muscle [4], human spleen [5], human diaphragm [6] and human aortic tissue [7] under tensile loading. The response of soft tissues at intermediate strain rates (> 5s -1 ) have been studied for skeletal muscle [1], porcine muscle [3], bovine liver tissue [14] and adipose tissue [17] under compressive loading.…”