2026 question paper
Composite Materials
28 questions
Q.1(a). Composite material is defined as (i) Mixture of two metals only (ii) Combination of two or more distinct materials with superior properties (iii) Pure ceramic material (iv) Heat-treated alloy20262m
Module 1: Introduction to Composite Materials
View this question on its own page →Composite material is defined as
(i) Mixture of two metals only
(ii) Combination of two or more distinct materials with superior properties
(iii) Pure ceramic material
(iv) Heat-treated alloy
Q.1(b). Carbon fibers are known for (i) High density (ii) High stiffness and strength-to-weight ratio (iii) Low strength (iv) High ductility20262m
Module 1: Introduction to Composite Materials
View this question on its own page →Carbon fibers are known for
(i) High density
(ii) High stiffness and strength-to-weight ratio
(iii) Low strength
(iv) High ductility
Q.1(c). Which of the following is not a matrix material? (i) Polymer (ii) Metal (iii) Ceramic (iv) Diamond20262m
Module 1: Introduction to Composite Materials
View this question on its own page →Which of the following is not a matrix material?
(i) Polymer
(ii) Metal
(iii) Ceramic
(iv) Diamond
Q.1(d). The Rule of Mixtures is used to determine (i) Hardness only (ii) Composite properties from constituent properties (iii) Tool wear (iv) Surface roughness20262m
Module 2: Lamina Assumptions and Properties
View this question on its own page →The Rule of Mixtures is used to determine
(i) Hardness only
(ii) Composite properties from constituent properties
(iii) Tool wear
(iv) Surface roughness
Q.1(e). A lamina is (i) Single layer of composite material (ii) Multi-layer composite (iii) Matrix material alone (iv) Fiber bundle20262m
Module 2: Lamina Assumptions and Properties
View this question on its own page →A lamina is
(i) Single layer of composite material
(ii) Multi-layer composite
(iii) Matrix material alone
(iv) Fiber bundle
Q.1(f). Which manufacturing process is suitable for continuous production of composite rods? (i) Bag moulding (ii) Hand lay-up (iii) Pultrusion (iv) Compression moulding20262m
Module 3: Manufacturing of Composite Materials
View this question on its own page →Which manufacturing process is suitable for continuous production of composite rods?
(i) Bag moulding
(ii) Hand lay-up
(iii) Pultrusion
(iv) Compression moulding
Q.1(g). Cross-ply laminate contains layers oriented at (i) ±45° (ii) 0° and 90° (iii) 30° and 60° (iv) Random angles20262m
Module 4: Laminated Anisotropic Plates
View this question on its own page →Cross-ply laminate contains layers oriented at
(i) ±45°
(ii) 0° and 90°
(iii) 30° and 60°
(iv) Random angles
Q.1(h). Tsai-Hill criterion is used for (i) Machining analysis (ii) Failure prediction in composites (iii) Heat transfer analysis (iv) Wear analysis20262m
Module 5: Failure Criteria and Thermal Analysis
View this question on its own page →Tsai-Hill criterion is used for
(i) Machining analysis
(ii) Failure prediction in composites
(iii) Heat transfer analysis
(iv) Wear analysis
Q.1(i). Von Mises criterion is mainly applicable to (i) Composite laminates only (ii) Isotropic materials (iii) Ceramic fibers (iv) Aramid fibers20262m
Module 4: Laminated Anisotropic Plates
View this question on its own page →Von Mises criterion is mainly applicable to
(i) Composite laminates only
(ii) Isotropic materials
(iii) Ceramic fibers
(iv) Aramid fibers
Q.1(j). Natural frequency is associated with (i) Static loading (ii) Free vibration characteristics (iii) Thermal expansion (iv) Manufacturing defects20262m
Module 6: Analysis of Laminated Plates
View this question on its own page →Natural frequency is associated with
(i) Static loading
(ii) Free vibration characteristics
(iii) Thermal expansion
(iv) Manufacturing defects
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Q.2(a). Define composite materials. Explain their classifications, characteristics and engineering applications.20267m
Module 1: Introduction to Composite Materials
View this question on its own page →Define composite materials. Explain their classifications, characteristics and engineering applications.
Q.2(b). Discuss various types of fibers used in composites, namely glass, carbon, ceramic and aramid fibers.20267m
Module 1: Introduction to Composite Materials
View this question on its own page →Discuss various types of fibers used in composites, namely glass, carbon, ceramic and aramid fibers.
Q.3(a). State the assumptions of lamina theory and derive the generalized Hooke's law for an orthotropic lamina.20267m
Module 2: Lamina Assumptions and Properties
View this question on its own page →State the assumptions of lamina theory and derive the generalized Hooke's law for an orthotropic lamina.
Q.3(b). Explain the orthotropic stiffness matrix and transformed stiffness matrix for composite lamina.20267m
Module 2: Lamina Assumptions and Properties
View this question on its own page →Explain the orthotropic stiffness matrix and transformed stiffness matrix for composite lamina.
Q.4(a). Discuss the Rule of Mixtures and its significance in predicting composite properties.20267m
Module 2: Lamina Assumptions and Properties
View this question on its own page →Discuss the Rule of Mixtures and its significance in predicting composite properties.
Q.4(b). Explain transformation matrices and their use in stress-strain transformation.20267m
Module 2: Lamina Assumptions and Properties
View this question on its own page →Explain transformation matrices and their use in stress-strain transformation.
Q.5(a). A composite has fiber strength of 2500 MPa and matrix strength of 60 MPa. Fiber volume fraction is 0.7. Determine longitudinal strength.20267m
Module 2: Lamina Assumptions and Properties
View this question on its own page →A composite has fiber strength of 2500 MPa and matrix strength of 60 MPa. Fiber volume fraction is 0.7. Determine longitudinal strength.
Q.5(b). A lamina experiences a temperature rise of 100°C. Coefficient of thermal expansion is 20 × 10⁻⁶ /°C, and modulus is 50 GPa. Find thermal stress if expansion is fully restrained.20267m
Module 5: Failure Criteria and Thermal Analysis
View this question on its own page →A lamina experiences a temperature rise of 100°C. Coefficient of thermal expansion is 20 × 10⁻⁶ /°C, and modulus is 50 GPa. Find thermal stress if expansion is fully restrained.
Q.6(a). Discuss maximum stress criterion and maximum strain criterion for composite failure analysis.20267m
Module 4: Laminated Anisotropic Plates
View this question on its own page →Discuss maximum stress criterion and maximum strain criterion for composite failure analysis.
Q.6(b). Differentiate between symmetric, angle-ply and cross-ply laminates.20267m
Module 4: Laminated Anisotropic Plates
View this question on its own page →Differentiate between symmetric, angle-ply and cross-ply laminates.
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Q.7(a). Derive the equilibrium equations of motion for laminated composite plates and state the assumptions of Classical Laminate Plate Theory.20267m
Module 6: Analysis of Laminated Plates
View this question on its own page →Derive the equilibrium equations of motion for laminated composite plates and state the assumptions of Classical Laminate Plate Theory.
Q.7(b). Explain the energy formulation method for the analysis of laminated composite plates. Discuss the significance of strain energy and potential energy in composite plate analysis.20267m
Module 6: Analysis of Laminated Plates
View this question on its own page →Explain the energy formulation method for the analysis of laminated composite plates. Discuss the significance of strain energy and potential energy in composite plate analysis.
Q.8(a). Discuss the static bending analysis of laminated composite plates. Derive the governing equations and explain the effect of laminate stacking sequence on bending behaviour.20267m
Module 6: Analysis of Laminated Plates
View this question on its own page →Discuss the static bending analysis of laminated composite plates. Derive the governing equations and explain the effect of laminate stacking sequence on bending behaviour.
Q.8(b). Explain the buckling and free vibration analysis of laminated composite plates. Discuss the factors affecting critical buckling load and natural frequencies.20267m
Module 6: Analysis of Laminated Plates
View this question on its own page →Explain the buckling and free vibration analysis of laminated composite plates. Discuss the factors affecting critical buckling load and natural frequencies.
Q.9(a). Write short note on: Equilibrium equations of laminated composite plates20267m
Module 6: Analysis of Laminated Plates
View this question on its own page →Write short note on: Equilibrium equations of laminated composite plates
Q.9(b). Write short note on: Explain static bending analysis in laminated composite laminates20267m
Module 6: Analysis of Laminated Plates
View this question on its own page →Write short note on: Explain static bending analysis in laminated composite laminates
Q.9(c). Write short note on: Discuss free vibrations and natural frequencies of laminated composite plates20267m
Module 6: Analysis of Laminated Plates
View this question on its own page →Write short note on: Discuss free vibrations and natural frequencies of laminated composite plates
Q.9(d). Write short note on: Buckling behavior of laminated composite structures and its engineering significance20267m
Module 6: Analysis of Laminated Plates
View this question on its own page →Write short note on: Buckling behavior of laminated composite structures and its engineering significance
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