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You tried printing a flexible phone case but it cracked easily. What is the most likely mistake in material selection?

medium📝 Analysis Q14 of 15
3D Printing - Materials for 3D Printing
You tried printing a flexible phone case but it cracked easily. What is the most likely mistake in material selection?
AUsed ABS instead of Nylon
BUsed TPU instead of ABS
CUsed Nylon instead of PLA
DUsed PLA instead of TPU
Step-by-Step Solution
Solution:

  1. Step 1: Understand material flexibility

    PLA is rigid and brittle, TPU is flexible and rubber-like.

  2. Step 2: Identify wrong material for flexible case

    Using PLA for a flexible case causes cracking because it lacks flexibility.

  3. Final Answer:

    Used PLA instead of TPU -> Option D

  4. Quick Check:

    Rigid PLA cracks, flexible TPU needed [OK]
Quick Trick: Flexible parts need TPU, not PLA [OK]
Common Mistakes:
MISTAKES
  • Confusing ABS or Nylon as flexible as TPU
  • Ignoring material brittleness

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