PSI - Issue 54

Isyna Izzal Muna et al. / Procedia Structural Integrity 54 (2024) 437–445 Isyna Izzal Muna, Magdalena Mieloszyk / Structural Integrity Procedia 00 (2019) 000 – 000

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of 150 × 13 × 2 mm following the ASTM standard D3039 for tensile testing. Each sample consists of 4 layers with the same fiber alignment in all layers. For the simulation, the matrix is modelled as an isotropic material, simulated with an elastic constitutive model with linear softening. The properties of these materials are shown in Table 1.

Table 1. Carbon fiber material parameters used for simulation

Young’s modulus ȋ ƒȌ

Density [tonne/mm3]

Thermal conductivity [W/mk]

Constituent

Poisson’s ratio

Yield stress (MPa)

Spesific heat [J/kgK]

Thermal Expansion [m/mK]

Carbon fiber

230

0.2

-

2.8997

0.00176

10

-6E-07

Polymer matrix

2,315

0.3

40.3

1800

0.00124

0.13

6.8E-05

2.3. Mesh and Boundary Conditions The meshes for a unit cell employed to analyze the RVE are shown in Fig. 2 with a 18.2% fiber volume fraction. The meshes generated with size of 14.3 are all converged. Quadratic quadrilateral elements are used for the matrix part while for the fiber part quadratic triangular elements are used for generating the mesh.

&ŝŐ͘ Ϯ͘ 'ĞŶĞƌĂƚĞĚ ŵĞƐŚĞƐ ĨŽƌ Ă ƵŶŝƚ ĐĞůů͘ ‹ˆˆ‡”‡– Ž‘ƒ†‹‰ ‘†‹–‹‘• ƒ”‡ ƒ’’Ž‹‡† –‘ –Š‡ ‰‡‡”ƒ–‡† —‹– ‡ŽŽ –‘ ‹‹ –Š‡ •ƒ‡ Ž‘ƒ†‹‰ Š‹•–‘”› ƒ† •• —– —„†Œ ‡› ––Š‡ ‡† – ‘‡ ŠŠ‡ƒƒ– ‹ – ƒ” ‡Ž ƒ” ‡– • ’‡‘– •• ǡ‡ –‘Šˆ‡ ‘„‘ —’‘†• ƒ‹ –”‡› ’ Ž ›‘ ‹ † ‹––Š‹ ‘‡  ‡•š ’ ”‡‡” ƒ‹ – ‡‡† –ˆ ƒ‘Ž” ‹ – Š˜‹‡•• –•‹‹‰ƒ —– ‹Ž‘ƒ– ‹Ǥ ‘ ‘ ” ‘• ‹• ‹—•Ž–ƒ –‘‹ ˆ ‰– ™ – Š‘‡ † •‹ƒˆ ˆ‡ ”’‡Ž ‡ •– Ž–‘Šƒ‡† „‹‘—‰• †ƒƒ•” –›Š ‡‘”†ƒ‹Ž– ‹ƒ‘†Ǥ ‡ Šƒ‹ ƒŽǤ Š‹Ž‡ ˆ‘” –Š‡ ‹–ƒ – •ƒ’Ž‡•ǡ ‘Ž› ‡ Šƒ‹ ƒŽ Ž‘ƒ†‹‰ ‹• ‘•‹†‡”‡† ‹ For the simulation of thermal loading, two amplitude tables are created with magnitude and duration for respective thermal group specimen at 65◦C and 145◦C for 6 hours. The samples will have two different heat transfer schemes. The first step is thermal radiation from the temperature chamber to the sample’s surface, followed by heat conduction throughout material constituents. The heat sample module in Abaqus was used in conjunction with the heat transfer physics, and the reference temperature at the boundaries was set to 0◦C. The temperature is subjected within the node-set for the entire unit cell with corresponding amplitudes. For the tensile loading simulation, the loads are applied similarly to the actual tensile test requiring appropriate boundary conditions which should be prescribed along all the sides of the unit cell. The translational symmetry