Math you can check, not trust.
Every result traces to a named equation and its inputs, so a reviewer can re-run it. Ask in plain language and the engine routes the question to the right solver.
Try it in ChatETS →Universal Applied Physics · The engine
An AI answer is a guess until the math checks out.
The Applied Physics Engine is 164+ verified calculation modules across 24+ engineering domains: the mathematics, physics, materials and structural-analysis layer underneath ChatETS and ETS Build. Describe a problem in plain language and it routes to the right solver, returning deterministic, reproducible results a reviewer can re-run.
Live · the engine, in miniature
Run one of the engine’s calculations on your own numbers.
A snap-fit arm is a cantilever. Change the length, thickness, width, load or resin, and deflection, stress, strain and stiffness update from the closed-form equations. The full engine carries this kind of checkable calculation across 164+ modules and 24+ domains.
Ask the engine through ChatETS →- Tip deflection
- 2.17 mm
- Root stress
- 37.5 MPa
- Surface strain
- 1.63 %
- Stiffness
- 4.60 N/mm
Small-deflection beam theory: δ = PL³/3EI and σ = 6PL/bt². Snap-fits are designed on strain, so compare it with the permissible strain for your grade. These are typical values; your datasheet and service temperature govern.
A full engineering mathematics library
Reproducible. Auditable. Correct.
The same engine behind ETS’s professional engineering work, exposed as a unified API and through the AI assistants, so a calculation gives the same answer every time and shows its work.
Mechanical engineeringPhysicsThermodynamicsElectricalMathematicsMaterials scienceStatisticsOptimizationFinite element
EC
Engineering calculations
- Beam deflection, structural analysis, safety factors
- Snap-fit, press-fit, living-hinge and fastener math
- Thermal expansion, creep, fatigue, contact stress
- Bolt preload and material property analysis
PM
Physical & mathematical core
- Classical and quantum physics modules
- Calculus, algebra, geometry, linear algebra
- Electrical and thermodynamics domains
- Cryptography and hashing utilities
MT
Materials & test intelligence
- Material property analysis and lookup
- Automated test-plan generation
- Material optimization for design targets
- FEA structural-analysis integration
SR
Statistical & research middleware
- Supervised ML: random forest, gradient boosting, SVM
- Time-series forecasting
- Community detection and topic modeling
- Function optimization
API
Programmable API
- Unified REST API across all modules
- Structured, reproducible results
- Rate-managed per organization
- Called directly or invoked by ChatETS tools
SB
Simulation bridge
- Integrates with robotics and game-engine simulation
- Physics validation endpoint for 3D geometry
- Bridges analysis to downstream tools
Where you’ll meet it
Not a standalone app. The correctness layer.
You rarely call the engine by name. It’s why the answers in the ETS tools can be checked instead of merely trusted.
Math instead of guesses
Ask a calculation question in plain language and the AI invokes the engine (snap-fit, beam, fatigue, thermal, creep) instead of estimating. Answers come back with deterministic math.
See ChatETSThe numbers behind every module
Material analysis, DFM scoring, stress checks and cost/feasibility curves are all computed by the engine across ETS Build’s design and manufacturing modules.
See ETS BuildBuilt for the people who decide
Whoever signs off, the answer holds up.
A calculation decision crosses four desks before it ships. Here is what ETS gives each of them.
Risk you can put a number on.
A fixed-price pre-tooling review starts at $3,500. One line of the failure ledger costs $10K–$75K once steel is cut. Seats, training and engineering hours can share a single annual agreement.
What a review covers →An expert built for cross-examination.
Fellow of SPE and author of the field’s standard text. Expert-witness work since 1997. A conflict check comes first, and availability, a CV and fees follow within one business day.
Request a conflict check →Simple to buy, easy to audit.
Pay by check, ACH, purchase order or card. Fixed price where applicable, with scope, timeline and quote agreed before work begins, and an NDA signed on request before we see anything.
Start the paperwork →Next step
Put verified engineering math to work.
Meet the engine inside ChatETS today, free. If your team needs it behind your own tools, we scope the integration with you. NDA on request before any technical discussion.
- NDA on request
- Senior engineer replies in one business day
- Fixed price where applicable
- Your data stays yours