The properties of the constituents of a unidirectional composite prepreg material are given in table 3.1. It consists of an oligomeric toughened epoxy resin reinforced with High Modulus M46J carbon fibres. The prepreg comprises 140gm² of fibres and a resin weight content of 34±2%. It has a cured ply thickness of 0.14mm. The material is being evaluated for the framework of the robotic arm on a state of the art satellite designed to capture and dispose of space debris. Material M46J Fibres M46J Fibres M46J Fibres M46J Fibres Epoxy Resin Epoxy Resin Epoxy Resin Epoxy Resin Layup table; Table 3.1 Property Fibre Modulus (E₁) Fibre Strength (of) Fibre Density (P+) Fibre Failure Strain (₁) Matrix Modulus (Em) Matrix Strength (om) Matrix Density (Pm) Matrix Failure Strain (Em) Ply 1 2 3 4 5 6 7 8 Materials Engineering: Composite Mechanics - Exam Questions 1 You are required to convert the prepreg into 3 different 8 ply laminates for testing and evaluation; these are UD (0°), biaxial (0°/90°) and a quasi-isotropic laminate. Create a table to show how each of these will be laid up. 0° 0° 0⁰ 0° 0° 0° 0° 0⁰ 0° Value 436GPa 4120MPa 1.92gcm 1% 0°/90° 0° 90° 0° 90° 90° -3 0° 90° 0° 4.5GPa 50MPa 1.3gcm 3.5% Quasi-isotropic -45° +45° 0° 90° 90° 0° +45° -45°
The properties of the constituents of a unidirectional composite prepreg material are given in table 3.1. It consists of an oligomeric toughened epoxy resin reinforced with High Modulus M46J carbon fibres. The prepreg comprises 140gm² of fibres and a resin weight content of 34±2%. It has a cured ply thickness of 0.14mm. The material is being evaluated for the framework of the robotic arm on a state of the art satellite designed to capture and dispose of space debris. Material M46J Fibres M46J Fibres M46J Fibres M46J Fibres Epoxy Resin Epoxy Resin Epoxy Resin Epoxy Resin Layup table; Table 3.1 Property Fibre Modulus (E₁) Fibre Strength (of) Fibre Density (P+) Fibre Failure Strain (₁) Matrix Modulus (Em) Matrix Strength (om) Matrix Density (Pm) Matrix Failure Strain (Em) Ply 1 2 3 4 5 6 7 8 Materials Engineering: Composite Mechanics - Exam Questions 1 You are required to convert the prepreg into 3 different 8 ply laminates for testing and evaluation; these are UD (0°), biaxial (0°/90°) and a quasi-isotropic laminate. Create a table to show how each of these will be laid up. 0° 0° 0⁰ 0° 0° 0° 0° 0⁰ 0° Value 436GPa 4120MPa 1.92gcm 1% 0°/90° 0° 90° 0° 90° 90° -3 0° 90° 0° 4.5GPa 50MPa 1.3gcm 3.5% Quasi-isotropic -45° +45° 0° 90° 90° 0° +45° -45°
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
I do not understand that why Qausi isotropic , -45 , +45 .......... (in the table ???????? )
Please expalin it to me step by step because I don't understand it
Transcribed Image Text:Materials Engineering: Composite
Mechanics - Exam Questions
The properties of the constituents of a unidirectional composite prepreg
material are given in table 3.1. It consists of an oligomeric toughened epoxy
resin reinforced with High Modulus M46J carbon fibres. The prepreg comprises
140gm2 of fibres and a resin weight content of 34±2%. It has a cured ply
thickness of 0.14mm. The material is being evaluated for the framework of the
robotic arm on a state of the art satellite designed to capture and dispose of
space debris.
Material
M46J Fibres
M46J Fibres
M46J Fibres
M46J Fibres
Epoxy Resin
Epoxy Resin
Epoxy Resin
Epoxy Resin
Layup table;
Ply
1
2
3
4
5
6
7
8
Fibre Strength (σf)
Fibre Density (pf)
Fibre Failure Strain (&fi)
Matrix Modulus (Em)
Matrix Strength (0m)
Matrix Density (Pm)
Matrix Failure Strain (Em)
1
Materials Engineering: Composite
Mechanics - Exam Questions
You are required to convert the prepreg into 3 different 8 ply laminates for
testing and evaluation; these are UD (0°), biaxial (0°/90°) and a quasi-isotropic
laminate. Create a table to show how each of these will be laid up.
0°
Table 3.1
Property
Fibre Modulus (E₁)
0⁰
0°
0°
0°
0°
0°
0°
0⁰
Value
436GPa
4120MPa
1.92gcm³
1%
4.5GPa
50MPa
1.3gcm-³
3.5%
0°/90°
0°
90°
0°
90°
90°
0°
90°
0°
Quasi-isotropic
-45°
+45°
0°
90°
90°
0°
+45°
-45⁰
I don't understand
why ??
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