Hook-and-loop fastening

A contemporary sketch model

Every number below is a modern illustrative assumption. The historical drawing supplies a question; the source model is an exercise in reasoning about it.

area = 20 cm^2 in 5..40 "Illustrative engaged area"
shearStrength = 5 N/cm^2 ± 20% "Assumed tested shear capacity per area"
load = 50 N "Illustrative application load"
safety = 2 "Assumed sizing factor"
capacity := area*shearStrength [N]
required := load*safety [N]
check hold: capacity >= required
sweep Engagement: area = 5, 20, 40 cm^2

Model limits

Uniform static shear with an empirical strength; no peel mechanics, individual hook contact, fatigue or textile modeling.

Explore it with your agent

Create a Study, inspect the installed capabilities, and use this source as a starting point. Ask the agent to explain the equations and assumptions, then replace illustrative inputs with measured evidence for your own design.

This example includes a scalar sweep. Use napkin_sketch to add the model and napkin_run to inspect the sweep; the source editor’s scalar comparison view is for simple scenarios.