Mechanics of Materials
Aji Abdillah Kharisma; Haris Rudianto; Achmad Benny Mutiara; Sulistyo Puspitodjati
Abstract
Titanium alloys have been extensively explored and fabricated for uses in several types of engineering fields. Its superior mechanical properties, Ti-10Mo-xCu alloy has potential applications in hip implants. Determining mechanical qualities via experimental methods takes an admittedly long time, especially ...
Read More
Titanium alloys have been extensively explored and fabricated for uses in several types of engineering fields. Its superior mechanical properties, Ti-10Mo-xCu alloy has potential applications in hip implants. Determining mechanical qualities via experimental methods takes an admittedly long time, especially when carried out in compression and tensile testing. Therefore, material design modeling using an MD simulation method approach were used to evaluate the mechanical properties on the compression and tensile tests of the Ti-10Mo-xCu alloy. In this research, material design through computer modeling was carried out at 300 K in the x <100> direction of the Ti-10Mo alloy with the addition of Cu composition at 3wt%, 6wt%, 9wt% to evaluate the properties of the alloy. The simulation results of the addition 3wt%, 6wt%, and 9wt% of Cu has produce maximum stresses of 603 MPa, 160 MPa and 236 MPa. The experimental method in the compression test shows a decrease in the maximum stress in the compression test after addition Cu to the Ti-10Mo alloy. It has the same trend value as the compression test outcomes on the experiment and MD simulation method. The result of tensile strengths for the Ti-10Mo-xCu alloy were 7056.8 MPa, 7238.1684 MPa, and 7433.0969 MPa. In short, the addition of copper of 3wt%, 6wt%, 9wt% successfully increased the tensile strength of the prepared titanium alloys. The results of crack propagation in tensile strength by MD simulation were successfully performed based on the increase at high strain until plasticity occurs in the alloy.
Mechanics of Materials
Bathini Sidda Reddy; Ch. Ravikiran; K. Vijaya Kumar Reddy
Abstract
The present paper considers the devise and development of a novel theory to examine the flexure analysis of exponentially graded plates exposed to thermal and mechanical loads. The properties such as elastic modulus and thermal modulus are assumed to vary exponentially along the thickness by keeping ...
Read More
The present paper considers the devise and development of a novel theory to examine the flexure analysis of exponentially graded plates exposed to thermal and mechanical loads. The properties such as elastic modulus and thermal modulus are assumed to vary exponentially along the thickness by keeping the poisson’s ratio constant. This theory fulfills the nullity conditions on the upper and lower sides of the exponentially graded plates for transverse shear stress. Hamilton’s principle is used to derive the equation of motion. The present theory’s numerical results are assessed with three-dimensional elasticity solutions and the results of other authors available in the literature. The influence of thermomechanical loads, thickness ratios, and aspect ratios on the bending response of exponentially graded plates are studied in detail. The analytical formulations and solutions presented herein could provide engineers with the potential for the design and development of exponentially graded plates for advanced engineering applications.
Mechanics of Materials
Fulufhelo Nemavhola; Simon Dhlamini; Rudzani Sigwadi; Touhami Mokrani
Abstract
This paper presents the results of mechanical strength of wet and dry zirconia/ Nafion® nano-composite membrane. The tensile tests were conducted to determine elastic modulus and stiffness of dry and wet pristine Nafion® membrane and modified Nafion® membrane. The composite membranes were ...
Read More
This paper presents the results of mechanical strength of wet and dry zirconia/ Nafion® nano-composite membrane. The tensile tests were conducted to determine elastic modulus and stiffness of dry and wet pristine Nafion® membrane and modified Nafion® membrane. The composite membranes were prepared by recast method of different synthesized zirconium oxide with the zirconia content of 10% by weight. The uniaxial mechanical properties of nano-composite membranes and recast Nafion® membrane were captured using a CellScale UStretch uniaxial testing system. The length, width, and thickness of samples were measured using a Vernier caliper and recorded prior to testing. It was found that elastic modulus of the wet Nafion recast is 62.06 %, 35.26 %, 30.79 % and 35.26 % higher than that of Nafion®/ Zr-100, Nafion/® Zr-80, Nafion®/Zr-50, and Nafion®/Zr-0, respectively. The elastic modulus of dry Nafion recast, Nafion®/Zr-100, Nafion®/Zr-80, Nafion®/Zr-50, and Nafion/Zr-0 membranes are 46.29 %, 83.31 %, 64.81 %, 59.84 %, and 78.36 % higher than those of wet Nafion® recast, Nafion®/Zr-100, Nafion®/Zr-80, Nafion®/Zr-50, and Nafion®/Zr-0 membranes, respectively. Furthermore, the results showed that when the water content increases in the nano-composite membranes the mechanical strength also decreases.
