Machine Design Calculators

Machine Design is the capstone engineering analysis course that brings together Statics, Dynamics, Mechanics of Materials, and Materials Science to design real mechanical components that must function reliably throughout their service life.

The course begins by revisiting stress analysis with a design focus — calculating factors of safety, selecting materials based on strength, fatigue, and corrosion resistance, and applying stress concentration factors to realistic geometries. Fatigue analysis is a central topic because most engineering failures occur under cyclic loading rather than static overload. The modified Goodman and Soderberg diagrams provide graphical and analytical tools for predicting fatigue life under combined mean and alternating stresses. Shaft design integrates bending, torsion, and fatigue analysis to size rotating shafts with keyways, shoulders, and other stress raisers. Bearing selection and life calculation introduce catalog-based design using the L10 life concept. Power transmission elements — gears, belts, chains, and couplings — are analyzed for load capacity, efficiency, and wear life. Fastener design covers bolt preload, joint separation, and fatigue of threaded connections. Weld strength analysis addresses both static and fatigue loading of welded joints. Spring design and press-fit analysis complete the coverage of standard machine elements.

Machine Design is where engineering analysis becomes engineering design. Students leave the course able to size and select standard mechanical components for real applications with quantified reliability and safety.