Durability Modeling of Environmental Barrier Coating (EBC) Using Finite Element Based Progressive Failure Analysis

Table 4

(a) Effective fiber and matrix properties. (b) Effective ply correlating to effective fiber/matrix properties.

(a)

Effective fiber and matrix properties (FVR = 0.5  [0,90]s)
SiC fiber			SiC matrix
Property	Units	Value	Property	Units	Value
𝐸11	MPa	380000	𝐸	MPa	380000
𝐸22	MPa	156000	NU		0.19
𝐺12	MPa	100000	ST	MPa	250
𝐺23	MPa	70000	SC	MPa	250
NU12		0.19	SS	MPa	190
NU23		0.17	ALPHA	1/degC	2.71𝐸−06
𝑆11𝑇	MPa	600
𝑆11𝐶	MPa	600
ALPHA11	1/degC	2.71𝐸−06
ALPHA22	1/degC	2.71𝐸−06

(b)

Properties of [0,90]s using effective fiber/matrix properties
Property	Units	Target values	Calibrated	Discrepancy (%)
𝐸11	MPa	284900	285000	0.0
𝐸22	MPa	284900	285000	0.0
𝐸33	MPa	190600	157000	17.6
𝐺12	MPa	112300	113000	0.6
𝐺23	MPa	104800	99000	5.5
𝐺13	MPa	104800	99000	5.5
NU12	MPa	0.126	0.13	3.2
NU23	MPa	0.2132	0.17	20.3
NU13	MPa	0.2132	0.17	20.3
𝑆11𝑇	MPa	318.5	321	0.8
𝑆11𝐶	MPa	318.5	321	0.8
𝑆22𝑇	MPa	318.5	321	0.8
𝑆22𝐶	MPa	318.5	321	0.8
𝑆12𝑆	MPa	213.5	210	1.6