ASTM D642

Resistance Mechanism

Compressive strength depends on structural geometry and material stiffness across container sidewalls. Testing under astm d642 evaluates how flute architecture, paperboard basis weight, and crease alignment contribute to sidewall stability under vertical force. Platen configurations include fixed platens, which force failure along the weakest structural point, and swivel platens, which distribute force across surface deviations.

Crease fatigue and moisture absorption reduce load capability by softening paperboard fibers. Corrugated boards collapse when vertical flutes buckle, causing immediate loss of stack capacity. Force displacement curves recorded during testing reveal whether initial failure originates from panel bulging or corner column crushing, allowing package engineers to reinforce specific structural weakness areas.

Deformation Limit

Deflection analysis identifies the deformation limit a container tolerates before internal product damage occurs. Under astm d642, load versus deflection records establish the transition from elastic strain to permanent structural collapse. Stacking safety factors integrate these laboratory values to offset prolonged warehouse storage loads and elevated humidity levels.