Jack Kojiro
Computer & Information Technology, Electrical & Electronics
Studied computer science and electrical engineering with focus on embedded systems and digital technologies.
About Jack Kojiro
Focus
📚 Education Contributions
Axial Loading Experiments
Six structured experiments on axial stress, elongation, and load sharing using the Axial Loading Simulator. Covers single-bar analysis, parallel compound bars, series stepped bars, material comparison, stiffness matching, and a full design check with safety factors.
Published: June 5, 2026
Beam Analysis Experiments
Six structured experiments on beam analysis using the Beam Analysis Simulator. Build shear-force and bending-moment diagrams, locate maximum bending stress, explore how section geometry drives stress through the second moment of area, map the strong span dependence of deflection, and verify superposition. Includes Python analysis scripts and exact expected results.
Published: June 5, 2026
Pressure Vessel Experiments
Six structured experiments on thin-walled pressure vessels using the Pressure Vessel Simulator. Confirm the 2:1 hoop-to-longitudinal ratio, size wall thickness for a safety factor, compare cylinder against sphere, check the thin-wall validity boundary, evaluate von Mises failure for the biaxial wall state, and find the allowable working pressure from a sweep. Includes Python analysis scripts and exact expected results.
Published: June 5, 2026
Shaft Torsion Experiments
Six structured experiments on shaft torsion using the Shaft Torsion Simulator. Verify the linear shear stress distribution, measure angle of twist versus length, size a shaft from a motor power rating, compare hollow and solid sections for the same torque, map the sensitivity of stress and stiffness to diameter, and decide whether strength or stiffness governs a design. Includes Python analysis scripts and expected results.
Published: June 5, 2026
Stress Transformation Experiments (Mohr's Circle)
Six structured experiments on plane-stress transformation using the Mohr's circle simulator. Build the circle from a stress state, read stress on an inclined plane, find the maximum shear and its plane, explain the forty-five-degree shear failure, analyze a shaft under combined bending and torsion, and compare von Mises with Tresca. Includes Python analysis scripts and expected results.
Published: June 5, 2026
Thermal Stress Experiments
Six structured experiments on thermal stress and thermal expansion using the Thermal Stress Simulator. Explore free expansion, fully constrained stress, gap-then-contact behavior, material comparison, safe temperature rise, and expansion joint sizing. Includes Python analysis scripts and exact expected results.
Published: June 5, 2026
Lesson 2.3: Beam Deflections and Stiffness Analysis
Master beam deflection analysis for precision engineering applications including PCBs, medical imaging C-arms, and CNC machine gantry rails
Published: November 23, 2025
Lesson 2.2: Bending Stresses in Simple Beams
Master bending stress analysis in engineering beams through real-world applications including electric train pantographs, crane jibs, and 3D printer gantry rails
Published: October 17, 2025
Lesson 2.1: Shear Force and Bending Moment in Beams
Master shear force and bending moment analysis for industrial beam structures including robotic arms, conveyor systems, and solar trackers through practical engineering applications
Published: September 21, 2025
Lesson 2.4: Combined Bending and Torsion Loading
Master combined stress analysis through real-world applications including drone arms, wind turbine shafts, and robotic grippers experiencing simultaneous bending and torsional loads
Published: September 19, 2025
Lesson 2.5: Composite and Built-up Beam Systems
Analyzing bending stresses in hybrid CNC machine beds with aluminum-steel composite construction
Published: September 18, 2025
Lesson 1.3: Compound Bars and Composite Systems
Learn how to analyze compound bars by applying equilibrium, deformation compatibility, and axial stiffness to calculate load sharing, stress, and deflection in both parallel and series multi-material systems.
Published: September 18, 2025
Lesson 1.4: Thermal Stresses and Strains
Analyze thermal stress and strain in constrained and compound systems: free expansion, fully restrained members, and differential expansion in bimetallic assemblies, with worked examples for mechatronic design.
Published: September 18, 2025
Lesson 1.5: Torsion of Circular Shafts
Learn torsional shear stress, angle of twist, and hollow-versus-solid shaft design by working three real examples: a Geneva mechanism crankshaft, a power-transmitting motor shaft, and a hollow-versus-solid comparison.
Published: September 17, 2025
Lesson 2.6: Principal Stresses and Failure Criteria Analysis
Applying Mohr's circle analysis for critical stress evaluation in mechatronic joint design and failure prediction
Published: September 17, 2025
Lesson 1.1: Introduction to Mechanics of Materials in Mechatronics
Learn stress, strain, Hooke's law, and Poisson's ratio by working three real mechatronic parts: a connecting rod in compression, a tie rod in tension, and a clevis pin in double shear.
Published: September 16, 2025
Lesson 1.2: Strain, Material Properties, and Shear in Actuator Systems
Understand strain, the full stress-strain curve, and shear behaviour by working three real applications: a CNC actuator shaft, a tensile coupon test, and a bonded elastomer anti-vibration mount.
Published: September 16, 2025
Chapter 2 Assignments: Structural Analysis in Mechatronic Systems
Comprehensive assignments covering shear force, bending moment, stress analysis, deflections, combined loading, composite beams, and failure analysis in mechatronic applications
Published: September 16, 2025
Lesson 1.6: Thin-Walled Pressure Vessels
Analyze hoop and longitudinal stress in cylindrical and spherical pressure vessels, size wall thickness for a given pressure and allowable stress, and understand why a sphere uses half the wall material of a cylinder for the same duty.
Published: September 16, 2025
Lesson 3: 3D Rotation Matrices and Spatial Transformations
3D rotation matrices, Euler angles, arbitrary axis rotations (decomposition and Rodrigues methods), and homogeneous transformations for robotics and aerospace applications
Published: November 21, 2025
Lesson 2: Planar Transformations and Mathematical Foundations
Master 2D robot kinematics through complex number mathematics for SCARA robot PCB assembly programming
Published: September 26, 2025
Lesson 5: Advanced Spatial Mechanisms Analysis
Complex spatial linkage analysis through humanoid robot hand design covering spherical joints, universal joints, and multi-finger coordination
Published: September 15, 2025
Lesson 6: Computer Simulation and System Integration
Real-time spatial mechanics simulation through multi-robot coordination systems covering numerical methods and distributed control integration
Published: September 14, 2025
Lesson 1: Kinematic Joints and Degrees of Freedom in 3D Systems
Master kinematic joint analysis and DoF calculations through industrial robotics, medical devices, and agricultural automation applications
Published: September 12, 2025
Lesson 4: Elementary Matrix Methods and Link Modeling
Systematic kinematic modeling of parallel mechanisms through Stewart Platform analysis using DH parameters and elementary matrices
Published: September 12, 2025
Lesson 6: Force Analysis and Mechanism Synthesis
Find joint forces with free-body diagrams and force polygons, read mechanical advantage as the reciprocal of the velocity ratio, judge force quality by the transmission angle, size links and pins, then synthesise a mechanism for a target.
Published: September 11, 2025
Lesson 5: Cam-Follower Systems and Motion Programming
Design the motion you want, then the cam that produces it. SVAJ motion laws, the displacement diagram, graphical cam-profile layout, and pressure-angle sizing, with cycloidal and harmonic motion compared.
Published: September 10, 2025
Lesson 4: Acceleration Analysis and Dynamic Forces
Differentiate the velocity loop for accelerations, build acceleration polygons, and turn accelerations into inertia and shaking forces. Worked on the slider-crank, four-bar, and scissor lift, each verified in a simulator.
Published: September 9, 2025
Lesson 3: Velocity Analysis and Instantaneous Centers
Differentiate the vector loop to find velocities. Closed-form piston velocity, four-bar angular velocities, instantaneous centers and Kennedy's theorem, velocity ratio and mechanical advantage, each verified in a simulator.
Published: September 8, 2025
Lesson 2: Position Analysis of Planar Linkages
Formulate and solve vector loop equations for planar mechanisms. Closed-form four-bar position (Freudenstein), slider-crank and scissor-lift geometry, Grashof classification, assembly modes, coupler curves, and limit positions, each verified in a simulator.
Published: September 7, 2025
Lesson 1: Kinematic Joints and Constraint Analysis
Classify planar kinematic joints, count degrees of freedom with the Kutzbach-Grübler equation, and verify mobility on four real mechanisms: the four-bar linkage, slider-crank, scissor lift, and toggle clamp.
Published: September 6, 2025
🛠️ Product Development
Getting Started with SiliconWit.io
Connect your first device to siliconwit.io and go from a live reading to an alert and an automation in a few steps.
Published: August 27, 2025