Structures and Properties of Materials MCE132 Basic Properties Quiz

Types of Loading

• Static loading involves a force applied slowly to an assembly or object.
• Dynamic loading involves a force applied repeatedly, causing variation in the magnitude and sometimes in the sense, of the internal forces.

Mechanical Properties of Materials

• Stress is defined as the internal force per unit area of a material, resisting an external force.
• The unit of stress is MPa (Megapascal) or N/mm².
• Strain refers to the ratio of change in dimension to the original dimension of a material, resulting from an external force.

Types of Stresses

• Normal stress is a stress that occurs when the force is perpendicular to the surface of the material.
• Shear stress is a stress that occurs when the force is parallel to the surface of the material.

Material Properties

• Strength is the ability of a material to resist external forces without breaking or deforming.
• Yield or proof stress is the stress at which a material begins to deform plastically.
• Elasticity is the ability of a material to return to its original shape after removal of an external force.
• Stiffness is the ability of a material to resist deformation under an external force.
• Poisson's ratio is the ratio of lateral contraction to longitudinal extension of a material under tension.
• Ductility is the ability of a material to be drawn into thin wires or sheets without breaking.
• Brittleness is the tendency of a material to break or shatter under an external force.
• Hardness is the ability of a material to resist scratching or abrasion.

Test your knowledge on the basic properties of engineering materials, specifically focusing on mechanical properties subjected to different types of loads such as static, dynamic, or repeated loads. The quiz is based on the course taught by Dr. Engy Hany, Assistant Professor at the Faculty of Engineering, Ain Shams University, for the Fall 2023 semester.