Use of crash test dummies has become the standard method for the study of human biodynamics during impact loading. They are used to study both the mechanism of injury and methods of protection from injury in the aircraft and automotive industries. Studies repeatedly demonstrate the limitations of the current dummies when they have been used for the simulation of motorcycle and pedestrian accidents. There is a definite need for the development of replacement limbs for the existing dummies. Research over the past few years has provided the insight necessary for the design of a breakable lower limb to be incorporated into the Hybrid III test dummy. This paper discusses the preliminary design of the artificial bone structure that is to be used in the Analocue Human Les Structure(AHLS). From a material science viewpoint, natural bone has an excellent strength to weight ratio because it is a fiber-reinforced . composite material. Therefore, a polymer composite or a specifically processed liquid crystalline polymer is most appropriate. Our laboratory findings have indicated that a fiber/Hydroxyapatite(HAP) reinforced polyamide can be designed to have certain mechanical properties which are close to those measured for bone.