Influence of wood properties and bonding parameters on bond durability of European Beech (Fagus sylvatica L.) glulams

Free Access

Table IV

Effects of variables t_lam and CAT on delamination – results of the general linear model (repeated measure (M)ANOVA) including covariate GRA.

Effect	Source	Sum of	Degrees of	Mean	F-value	Partial Eta	F-value
		squares	freedom^*	square	sample 1	squared	sample 2
Between-subject	t _lam	0.197	2	0.099	10.475^**	0.617	6.932^**
	CAT	0.062	1	0.062	6.571^**	0.336	2.720^***
	t_lam*CAT	0.266	2	0.133	14.125^**	0.685	8.885^**
	GRA_x	0.010	1	0.010	1.076^***	0.076	1.262^***
	Residual (bondline)	0.122	13	0.009

Within-subject	Bondline	0.028	1.769	0.016	0.669^***	0.049	0.371^***
	Bondline*t_lam	0.061	3.537	0.017	0.721^***	0.100	0.503^***
	bondline*CAT	0.036	1.769	0.021	0.861^***	0.062	0.522^***
	Bondlinet_lamCAT	0.053	3.537	0.015	0.625^***	0.088	0.650^***
	Bondline*GRA_x	0.044	1.769	0.025	1.033^***	0.074	0.742^***
	Residual (bondline)	0.550	22.993	0.024

Multivariate^†	Bondline*GRA_x	0.861	15.436	4.000	10.000^**	0.861	10.000^**

Degrees of freedom adjusted for between-subjects with Greenhouse-Geisser value of 0.442.

^**

Significant for p < 0.05.

^***

Not significant.

^†

Pillai’s trace; sample 2 = replication – only F-value presented; GRA_x= growth ring angle at bondline position x.