Stress Intensity Factors Pro vs Mechanical Engineering Toolkit

Stress Intensity Factors Pro is the easiest and most convenient way to calculate SIFs when and where you need to. Simply select from the available geometries, enter the loads and dimension, and the App will quickly give you the resulting "K". Share a PDF of the result via email or a print out. Features include: • Universal App (Designed for iPad and iPhone) • Automatic conversion of the inputs and results between Imperial and Metric units • Share your calculation Mode I "K" solutions included are: Standard Specimen: • Single Edge Notch in Tension • Single Edge Notch in Bending • Center Cracked in Tension • Double Edge Notched in Tension • Compact Specimen • Disk Shaped Compact Specimen Infinite Plates • Through Crack in an Infinite Plate (also includes Mode II solution) • Edge Crack in a Semi-Infinite Plate • Surface Flaw in an Infinite Plate Finite Plates • Surface Flaw in a Flat Plate • Embedded Flaw in a Flat Plate • Corner Crack in a Flat Plate Check out our other engineering apps by searching the iTunes store for: • Pressure Vessel Pro • Moments of Inertia • Mohr's Circle • Stress Concentrations Pro or search J.R.Hobbs to see them all.

Mechanical Engineering Toolkit is a professional engineering calculator for students, researchers, and practicing engineers. Choose a formula, enter your variables, and get instant results — with calculation steps, formulas, diagrams, and unit conversions shown along the way. Switch between SI and Imperial units anytime, save favorites, and find the right tool fast with recommendations by major. Save your inputs as named projects, and export any result as text, image, CSV or PDF. Categories and tools: Mechanics of Material • Moments of inertia of plane areas • Force-displacement relation of a bar • Torsion formula and angle of twist • Flexure formula of a beam • Transverse shear stress • Deflections and slopes of cantilever and simple beams • Plane stress transformation and Mohr's circle • Principal stresses and planes • Spherical shell and thin-walled pressure vessel stresses • Buckling load of a column • Thermal deformation and stress • Combined loading • Bolted / riveted joints • Fatigue safety factor • Shaft power and torque Statics • Centroid of an area • Resultant of a force system • Beam reactions • 2D truss analysis Machine Design • Helical compression springs • Spur gear geometry and stresses • Shaft fatigue design (DE-Goodman) • Bearing L10 life • Belt and chain drives • Bolt preload / torque-tension • Fillet weld strength • Press / shrink-fit interference • Shaft critical speed (Dunkerley) • Beam natural frequency (five end conditions) • Torsional natural frequency (one or two rotors) Fluids & Thermal • Reynolds number and flow regime • Pipe pressure drop (Darcy-Weisbach with Colebrook) • Pump and fan power • Composite wall conduction • Fin efficiency • Heat exchanger sizing by LMTD Theory of Elasticity • Constitutive relation of linear elastic material • Stress/strain of linear elastic material Composite Material • Lamina and laminate stress/strain • Lamina engineering constants • Laminate plane and 3D properties • Rule of mixtures • Failure criteria (Tsai-Hill, Tsai-Wu) Reference Tables • Drill & tap chart (metric and imperial thread series) • ISO 286 fits & tolerances • Standard sections (AISC W, IPE, HEB) • Unit converter No account required. Works offline. Available in English, Chinese, German, French, and Japanese.