# Stress checks against your standard (Lab)

> In our lab, an AI agent ran SOLIDWORKS Simulation on a copy of a part, judged it against a written standard, then changed it until it passed.

Status: Lab · Canonical: https://paracrux.com/docs/lab/stress-checks

Lab: shown in demos and case studies, not for sale. This page describes what we are building, not something you can buy.

## What we are building

- A study written once: loads, fixtures and faces picked by the feature that made them, with an expected count, so a model change cannot quietly move a load.
- Run on a copy in SOLIDWORKS Simulation. The original is never saved.
- Judged against a written standard: factor of safety on yield and ultimate, deflection, and elements through the thinnest wall. Anything it cannot measure is marked open, never passed.
- Changed only where the study allows, within stated bounds, then rebuilt and run again. On CR-110 the small end was short in tension (factor of safety 1.80 against 2.0); after redesign it passed at 2.34, and the rod and cap were 15.5 g lighter.
- Every run leaves a results bundle that the ParaCrux app turns into a printable report, or a comparison of runs, in your own template.

## See it

- Recording: [CR-110 stress check: loaded, judged, changed, checked again](https://paracrux.com/case-studies/con-rod-stress#film) (LAB CASE STUDY · 29 SEP 2026)
- [The CR-110 stress case study](https://paracrux.com/case-studies/con-rod-stress)
- [Set your own limits against the measured results](https://paracrux.com/case-studies/con-rod-stress#standard)

## What it is not, yet

- Simulation checks are not in the Agent you can buy.
- The loads in the case study are our assumption for a small single-cylinder engine, not measured values.
- Buckling and fatigue were not judged. A con rod is fatigue-critical, and a static pass is not fitness for service.
- Prepared, not certified: results need review by a competent engineer.

## What you can do today

- [Ask about the open model](https://paracrux.com/docs/ask-about-your-model.md) (Available): Ask a question in plain English and the Agent reads the answer from the model open in SOLIDWORKS. Reading never changes anything.

## Covers

- Stress checks (Lab): Linear static studies judged against an engineering standard, with lighter options suggested.