AGE EFFECT ON THE MECHANICAL PROPERTIES OF HIP JOINT BONE: AN EXPERIMENTAL INVESTIGATION
Rafiullah Khan1, Waseem ur Rahman1, Misbah Ullah2, Kamran Afaq3, Muhammad Amjad1, Sakhi jan1
ABSTRACT
Bone is one of the important body components of all vertebrates. It is a natural composite, composed of bonesalt
plates as matrix binder and soft collagen as reinforcing fibers. As bone supports all the organs of a body so its
mechanical behavior is of prime importance. The mechanical properties of bone varies with age. In this paper, the
effect of age on various mechanical properties of hip joint bone was investigated experimentally. For this purpose
hip joint bone specimens of male bovine of different age groups were tested for fracture toughness, young modulus
and tensile strength in the longitudinal and transverse directions of the collagen’s fibers. Compact tension specimen
was used for the fracture toughness, while for young modulus and tensile strength, rectangular flat specimens were
used. The test procedures were similar to ASTM (American standard for testing and measurements) techniques. The
test result revealed reduction in mechanical properties of hip joint bone with the age.
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