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Guided exercise

Inspect layers, add patches and understand ply drops

Continue on your own mold: build the skin, vary reinforcement footprints, inspect each layer and read the local thickness steps.

Time about 35 minLevel AdvancedExample Your CAD mold and eight-ply skin

This page prints cleanly to sit beside the workspace.

Prerequisites

  • A desktop browser and a STEP mold with a chosen tooling face.
  • Complete the first-part guide through an eight-ply stack, or open your saved CAD laminate.
  • The accompanying foil exercise uses your local sample-mold STEP; it is not bundled with the public application.

Starting example

Label
Your CAD mold and eight-ply skin
Open from
File → Open file, or Import STEP…
Basis
No shipped sample — bring your own

Use your own CAD. The recorded foil exercise uses synthetic reference materials and a [45/0/-45/90]s base skin; those are editable design assumptions.

Open workspace All tutorials

  1. Finish the skin on the same mold

    Import STEP… and select only the tooling surface. Use these faces for my part creates whole-face coverage. Apply the reference material set, define your spanwise rosette and Apply stack pattern with QI 8-ply. Declare the first listed ply as the tool side.

    Controls this step usesImport STEP…Use these faces for my partApply setApply stack patternFirst ply in the list

    Expected: Eight plies cover the same selected CAD face. At 0.20 mm per ply, the declared base stack is 1.60 mm.

    Note: Leave shafts and back faces out. Reference thickness is an assumption, not qualified material data.

    Report this step ↗

  2. Watch the layup being built

    Choose Stacked layers above the 3D view. Press Play layup, then move Build through ply to inspect an intermediate stage. Show all plies restores the complete view.

    Controls this step usesStacked layersPlay layupBuild through plyShow all plies

    Expected: The actual trimmed footprint of each committed ply appears on your mold in tool-to-bag order. The design revision stays unchanged.

    Note: Thickness display × changes only the drawing. The numerical thickness remains your declared value.

    Report this step ↗

  3. Explode and inspect one layer

    Choose Exploded layers and adjust Layer gap. Drag to orbit, click a layer and tick Isolate selected ply. Untick Show mold and use Fit view for a closer inspection. Return to Show all plies when finished.

    Controls this step usesExploded layersLayer gapIsolate selected plyShow moldFit viewShow all plies

    Expected: Each layer has its own CAD footprint. Selecting a ply reveals its material, nominal thickness, angle and region.

    Note: Normal offsets are illustrative. A flipped mold normal can be inspected with Flip display side; this view does not solve curved buildup or fibre drape.

    Report this step ↗

  4. Define a tapered reinforcement patch

    Return to Coverage, then Regions. Choose the same tooling group, set XY projection and add four points numerically. In the foil exercise, Patch A uses (-400,-115), (400,-115), (360,10), (-360,10), in millimetres. Name it Patch A and press Apply boundary.

    Controls this step usesCoverageRegionsAdd point numericallyRegion nameApply boundary

    Expected: A real OCCT clip trims the upper skin inside the trapezoid. Its measured surface area differs from the polygon area.

    Note: These coordinates belong to the recorded foil mold. For another mold, use its own coordinates and a projection that intersects the selected face.

    Report this step ↗

  5. Add a patch pair with another footprint

    In Ply stack, add a +45° and a -45° ply on Patch A at 0.20 mm. Repeat the boundary workflow for Patch B: (-260,-100), (260,-100), (220,-10), (-220,-10); assign two carbon fabric plies at 0.25 mm. Patch C: (-120,-85), (120,-85), (100,-25), (-100,-25); assign two UD plies at 0.20 mm.

    Controls this step usesPly stackAdd a plyMaterial referenceThickness (mm)Angle (°)RegionAdd ply

    Expected: The design has 14 plies across four regions. The smaller patches stop progressively earlier in span and chord.

    Note: Place these pairs above the base skin. Ending a ply defines a drop footprint; it does not define a qualified taper, resin fill or cover transition.

    Report this step ↗

  6. See the drops in the thickness section

    Choose Thickness section, XY projection and the X direction. Move Across until Y is near -50 mm on the foil. Compare the plot with Exploded layers and ply-by-ply playback.

    Controls this step usesThickness sectionSection projection planeSection directionSection positionExploded layers

    Expected: The sampled local stack rises from 8 to 10, 12 and 14 active plies, with declared thicknesses 1.60, 2.00, 2.50 and 2.90 mm. Moving the section shows the varying chordwise footprint.

    Note: This section samples display tessellations. It is a local stack schematic; it does not certify an exact curved solid, transition or strength.

    Report this step ↗

  7. Compare an edit and undo it

    Edit a patch ply angle or Thickness (mm), Apply changes, then inspect the layer and section again. Press Undo to return to the earlier design. Reorder or duplicate a ply and inspect the result before keeping it.

    Controls this step usesEditThickness (mm)Apply changesUndoDuplicate

    Expected: The layer, section and part-plan declarations follow the committed design. Undo restores the previous geometry and numerical thickness.

    Note: Editing a ply thickness does not change the material card. Check both declarations deliberately.

    Report this step ↗

  8. Measure exact coverage and hand over the design

    Use Review my design. Expand Additional analysis, select overlapping regions and Measure local declared-thickness map. Read the measured evidence separately from the sampled section. Save project, Export project and Get layup schedule for handoff.

    Controls this step usesReview my designAdditional analysisMeasure local declared-thickness mapSave projectExport projectGet layup schedule

    Expected: You have an editable patch design, a visible ply-drop profile and a current schedule. Exact measured region evidence names its scope and revision.

    Note: A regional symmetry or balance check does not prove that the combined local stack is symmetric, strong or producible.

    Report this step ↗

← Back to the guide

Completion checklist

  • You can see the actual ply footprints on your CAD mold.
  • You can isolate a ply and build the layup in order.
  • You have authored three different reinforcement footprints and two material thicknesses.
  • You can explain which local stations have 8, 10, 12 or 14 plies.
  • The current design and printable schedule are saved.

Download a feedback report for this exercise ↗. The report stays local until you choose to share it.

Reset and recovery

  • Show all plies resets the display; it does not alter the design.
  • Undo reverses a committed ply or region edit. Keep the eight-ply baseline as a separate portable file before exploring.

Why this matters

Different ply footprints change where material is present. Layer inspection and a local section make the drop locations and thickness consequences visible before you share the layup definition.

What this exercise does not claim

  • No strength, stiffness, buckling or manufacturing qualification.
  • Curved nominal offsets and sampled drop profiles are illustrative; no solved drape or fibre paths.
  • No automatic drop spacing, cover transition, resin fill or machine program.

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