Damage Initiation Analysis of a Tension Stiffened Composite PRSEUS Panel Based on Modified Hashin Criteria

Table 5

Comparison between standard analysis and UMAT analysis in values of axial displacement and maximum in-plane strain in composite components at damage initiation.

Composite component	Axial displacement U1 (mm)		Maximum in-plane strain
	Standard analysis	UMAT analysis	Standard analysis	UMAT analysis
Skin
Stringer strap
Stringer flange
Frame strap
Frame flange
Stringer web
Frame