Computational Modeling of Metal Toe Caps to Reinforce Safety Footwear: A Finite Element Approach

Toe caps in safety footwear improve protection against workplace injuries, and the commonly used toe cap materials are metal, plastic, and composite. Metal is used to strengthen the toe cap; however, increased thickness proportionally adds weight to the shoe. Adding flutings can strengthen the toe cap rather than increase the thickness, and a study is required to evaluate the impact of fluting height and direction on the strength of the toe cap. The objectives of this study were to optimize the strength of the toe caps by applying flutings along different directions with various fluting heights and toe cap materials. Toe caps with no flutings, longitudinal flutings, and transverse flutings were the three types of samples used to evaluate deformation. For both longitudinal and transverse directions, the heights of 2 mm, 3 mm, and 4 mm flutings were added to the toe cap surface, and those models of the toe caps were developed by SolidWorks software. Ansys software performed finite element analyses of all the toe cap models for different materials (steel, aluminum, titanium). The strength of the toe cap was determined through deformation analysis by applying a load to the surface. Compared to longitudinally fluted toe caps, transversely fluted toe caps displayed a lower deformation in this test. Furthermore, the 4 mm steel transverse fluted toe cap showed less deformation than the 2 mm and 3 mm steel transverse fluted toe caps. Moreover, steel has the lowest rate of deformation among the three materials. Therefore, the toe cap with 4 mm transverse flutings was considered the strongest among the analyzed toe cap models. This study may be helpful for footwear manufacturers to produce stronger toe caps for safety footwear for workers who need to carry heavy-weight objects in their workplace.