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.

Test	Criterion	Meaning
Type	`n_type1=n_elements`	The formulation did not change.
Band	`n_mat2=n_mid_elems`	Only the component received aluminum.
Partition	`n_mat1+n_mat2=n_elements`	There is no shortage or excess of elements.
Two materials	`n_mat1>0` and `n_mat2>0`	The challenge did not degenerate into a homogeneous case.
Properties	`young_ratio=3`	Inputs are consistent.
Result	`passes=1`	All tests passed.

Transfer case

Transfer case: bimaterial bracket

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

Execution cycle

1 Define the MAT,2 region.
2 Predict partition counts.
3 Adapt selection and EMODIF.
4 Prove the partition without relying only on color.

Evidence to retain

Region sketch n_mat1+n_mat2=n_elements PNUM,MAT view Numeric audit

Which assignment rules do not depend on whether the geometry is a beam or a bracket?

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.

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View complete module Download m03-kit.zip