نوع مقاله : مقاله پژوهشی
نویسنده
گروه مهندسی مکانیک، دانشکده مهندسی، دانشگاه صنعتی کرمانشاه، کرمانشاه، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
The stress–strain behavior of materials is conventionally evaluated through uniaxial tensile or compression tests; however, these methods are often impractical for small material volumes or localized property assessment. As a non-destructive, simple, and accessible alternative, the spherical indentation hardness test offers a promising solution for estimating mechanical properties, including the elastic modulus. In this study, a method based on the Brinell hardness testing principle is proposed to estimate the elastic modulus of materials. The results obtained from this technique are validated against standard uniaxial tensile test data. It is shown that the estimated elastic modulus values are strongly dependent on the applied indentation load, with optimal accuracy achieved at a specific force level. Deviations from this optimal load, either higher or lower, lead to reduced estimation accuracy due to variations in material pile-up or sink-in around the indentation zone, which affects the penetration depth measurement and, consequently, the calculated mechanical properties. The proposed method demonstrated an estimation error of less than 5% for the elastic modulus. Furthermore, the optimal indentation force is material-dependent and should be determined prior to application. Overall, the results confirm that this method can reliably estimate the elastic modulus in a non-destructive manner, particularly in cases where material availability is limited or localized evaluation is required under in-service conditions.
کلیدواژهها [English]
)