What is the maximum shear stress?

What is the maximum shear stress?

The maximum shear stress is the maximum concentrated shear force in a small area. The neutral axis of a cross section is the axis at which the value of the normal stress and strain are equal to zero.

Where is the maximum shear stress in a circular shaft due to torsion?

Shafts are mechanical components, usually of circular cross-section, used to transmit power/torque through their rotational motion. In operation they are subjected to: torsional shear stresses within the cross-section of the shaft, with a maximum at the outer surface of the shaft.

What is the difference between torque and torsion?

Torsion happens when the torque causes a shear stress to be applied on the body. The main difference between torque and torsion is that torque describes something that is capable of producing an angular acceleration, whereas torsion describes the twist formed in a body due to a torque.

Does torque cause normal stress?

Normal stress and normal strain (which are caused by tension and compression) occur when a force is applied normal (perpendicular) to an area. Torque on a shaft causes shear stress. The torsion, or twist, induced when torque is applied to a shaft causes a distribution of stress over the shaft’s cross-sectional area.

What is equivalent torque?

Similarly, the equivalent torque. may be defined as the torque which wil produce the same maximum shear stress as produced by the bending moment and torque acting separately.

What is equivalent shear force?

Brainly User. Shear force is the force in the beam acting perpendicular to its longitudinal (x) axis. The shear forces at the ends of the beam are equal to the vertical forces of the support reactions. kattyahto8 and 3 more users found this answer helpful. Thanks 2.

What is equivalent bending moment?

[i′kwiv·ə·lənt ′bend·iŋ ‚mō·mənt] (mechanics) A bending moment which, acting alone, would produce in a circular shaft a normal stress of the same magnitude as the maximum normal stress produced by a given bending moment and a given twisting moment acting simultaneously.

What is equivalent twisting moment?

[i′kwiv·ə·lənt ′twist·iŋ ‚mō·mənt] (mechanics) A twisting moment which, if acting alone, would produce in a circular shaft a shear stress of the same magnitude as the shear stress produced by a given twisting moment and a given bending moment acting simultaneously.

What is twisting moment in shaft?

Shear Stress in the Shaft When a shaft is subjected to a torque or twisting a shearing stress is produced in the shaft. the “Polar Moment of Inertia of an Area” is a measure of a shaft’s ability to resist torsion. The “Polar Moment of Inertia” is defined with respect to an axis perpendicular to the area considered.

How the shaft is designed when it is subjected to twisting moment only?

6. Shafts Subjected to Combined Twisting Moment and Bending Moment  When the shaft is subjected to combined loading, the design is usually based on the maximum shear stress theory, since the shafts are usually made of ductile materials.

When a shaft is subjected to pure twisting then the type of stress developed is?

Explanation: Shear stress is produced when the shaft is subjected to pure twisting (torsion). The shear stress due to twisting moment is zero at the axis of the shaft. Explanation: The product of shear modulus(C) and polar moment of inertia (J) is called torsional rigidity.

When the shaft is subjected to fluctuating loads what will be the equivalent twisting moment?

A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is.

What are the types of shaft?

They are mainly classified into two types.

• Transmission shafts are used to transmit power between the source and the machine absorbing power; e.g. counter shafts and line shafts.
• Machine shafts are the integral part of the machine itself; e.g. crankshaft.
• Axle shaft.
• Spindle shaft.

How do I choose shaft material?

The main requirements for the shaft material were:

1. Yield strength > 30 ksi.
2. 5 years before failure – corresponds to 3,500 hours actual use.
3. Lightweight.
4. Easy to manufacture.
5. Corrosion resistant.

Where is a shaft used?

A shaft is a long piece of metal, usually circular in cross section, in an engine or machine that turns and transmits power or movement to another part of the machine. They are used for transmitting rotary motion and torque from one point to another.

What is type of coupling?

Couplings are used to connect two shafts for torque transmission in varied applications. However there are two main types of couplings (Fig 1) which are (i) rigid couplings, and (ii) flexible couplings. Fig 1 Types of couplings. Rigid couplings. Rigid couplings are used for shafts having no misalignment.

What is a flexible coupling?

A flexible coupling exists to transmit power (torque) from one shaft to another; to compensate for minor amounts of misalignment; and, in certain cases, to provide protective functions such as vibration dampening or acting as a “fuse” in the case of torque overloads.

What is the purpose of flexible coupling?

The purpose of a flexible coupling is to transmit torque from one piece of rotating equipment to another, while accepting at the same time a small amount of misalignment. Flexible coupling misalignment is expressed, as an order of magnitude, in thousandths of an inch.

How do you choose flexible coupling?

Cost and maintenance factors are covered later.

1. Torque rating. One of the key factors in selecting a coupling is its torque rating — the amount of torque that it can transmit.
2. Service factor.
3. Outside diameter.
4. Weight.
5. Moment of inertia.
6. Torsional deflection.
7. Torsional stiffness.
8. Backlash.