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Challenge ~10 min · ~14 min remaining

Challenge: bimaterial beam

Assign MAT,2 to the center band, predict the effect, and demonstrate the complete partition.

Verifiable challenge — Bi-material beam

Complete 03_challenge.mac. The region 0.4L ≤ X ≤ 0.6L will be aluminum and the rest steel. Do not mesh again, do not use IDs and do not enter /SOLU.

TestCriterionMeaning
Typen_type1=n_elementsThe formulation did not change.
Bandn_mat2=n_mid_elemsOnly the component received aluminum.
Partitionn_mat1+n_mat2=n_elementsThere is no shortage or excess of elements.
Two materialsn_mat1>0 and n_mat2>0The challenge did not degenerate into a homogeneous case.
Propertiesyoung_ratio=3Inputs are consistent.
Resultpasses=1All tests passed.

Transfer case

Transfer case: bimaterial bracket

Move the attribute audit from the beam to a bracket with a reinforced region.

Deliberate-practice target

Transfer attribute auditing to a new geometry and prove that the assignment matches the modelling intent.

Execution cycle

  1. 1 Define the MAT,2 region.
  2. 2 Predict partition counts.
  3. 3 Adapt selection and EMODIF.
  4. 4 Prove the partition without relying only on color.
Evidence to retain
2 · Rate your evidence

Unambiguous regions

MAT,1 and MAT,2 regions express geometric intent, avoid fragile IDs, and do not overlap.

Stored attributes audited

Element-level counts cover the complete model and match the predicted partition.

Evidence independent of the plot

Counts or CSV support the verdict in addition to PNUM,MAT.

Transfer rule explained

The justification separates geometry-specific choices from the audit contract that always applies.

Your reflection stays in this browser.

Graduated hints

1 · Concept hint

Regions change; stored-attribute auditing does not.

2 · Command hint

Select, apply EMODIF, and recount MAT.

3 · Explained solution

All elements belong to exactly one intended material region.

View complete module Download m03-kit.zip