Structer vs MacCiv

Structer is a structural analysis toolbox for students and practicing engineers in aerospace structures. It provides clear calculations and visualizations for common problems in aircraft structural analysis and sizing. StruCalc is intended for educational use, preliminary analysis, and engineering sanity checks. **Included Tools:** • Section Properties & Stress –Area, centroid, moments of inertia, section modulus, and stress analysis for common sections • Beam Internal Loads – Support reactions, shear and bending diagrams for simple beams and combined loading • Mohr’s Circle (2D Stress) – Principal stresses, maximum shear stress, and orientation • Elastic Column Buckling (Euler) – Preliminary buckling screening for slender compression members with effective length factors • Stress Due to Axial and Bending Loads – Compute section stress based on user-defined area, moment of inertias and location. **Methods and Validation:** Calculations use standard closed-form analytical formulas, cross-checked against independent hand calculations and standard engineering references, including: – Megson T.H.G — Aircraft Structures for Engineering Students – Young, W.C. & Budynas, R. G. — Roark's Formulas for Stress and Strain – Bruhn, E.F. — Analysis and Design of Flight Vehicle Structures – Niu, Michael C. Y. - Airframe Stress Analysis and Sizing

MacCiv is the world's first Apple-native structural engineering app — a fast, beautiful finite-element tool for analyzing 2D and 3D frames right on your iPhone and soon on Mac Build a structure, hit Solve, and instantly read the internal forces and deformations: axial, shear, bending-moment and torsion diagrams, support reactions and deflected shapes. No clunky desktop software, no steep learning curve — just a clean, intuitive interface designed for the way you think. WHAT YOU CAN DO • Draw beams and columns, place supports (fixed, pinned, roller, hinge) and apply loads (distributed, point, trapezoidal, moments) • Solve full 3D frames with a real finite-element engine • Read coloured N / shear / moment / torsion diagrams drawn on the tension side, plus reactions and displacements • Switch between concrete, steel and wood members — each with proper material classes (EC2 / EC3 / EC5) • View your model as a true 3D solid, with steel shown as I-beams • See the seismic centre of mass and centre of stiffness for each structure BUILT FOR STUDENTS • Teaching mode: leave a load blank and MacCiv shows the answer as a formula (qL²/8, PL/4, …) instead of a number — perfect for learning statics • Metric and imperial units • Available in 9 languages NATIVE EVERYWHERE MacCiv is designed from the ground up for Apple platforms — it looks and feels right on macOS, iPhone and iPad, with full multitouch and a navigation cube for orbiting your model. FREE, WITH AN OPTIONAL UPGRADE MacCiv is free to use, supported by occasional ads. Prefer a clean, ad-free experience? Unlock MacCiv Pro with a single one-time purchase — it removes ads on all your devices, forever. Questions or feedback? We'd love to hear from you: maccivapp@gmail.com