What is a motorbike subframe?
The subframe is the bit that holds the seats and bolts onto the back of the mainframe that holds the engine.
What is half duplex cradle frame?
Half-duplex cradle or double cradle The motorcycle engine is held in a double cradle with a single spine and single downtube.
Which metal is used in bike engine?
An aluminum internal combustion engine is an internal combustion engine made mostly from aluminum metal alloys. Many internal combustion engines use cast iron and steel extensively for their strength and low cost.
What is single cradle frame?
Single cradle frame It comprises steel tubes of various diameters and strength ratings welded together to form a structure that holds together the various components of a motorcycle. Single cradle frames are also often referred to as single downtube frames.
Which frame is lighter in weight?
Aluminum frames are lighter- On average, an aluminum bike weighs around 1-2 pounds less than a comparable steel bike. The reason aluminum is lighter than steel by volume is that it has a much lower density.
How is a stressed member engine used in a vehicle?
A stressed member engine is a vehicle engine used as an active structural element of the chassis to transmit forces and torques, rather than being passively contained by the chassis with anti-vibration mounts.
Which is the equivalent of the mean stress effect?
Smith, Watson and Topper defined an equivalent stress amplitude as [3] Inserting fatigue strength and rewriting to find the mean stress corrected fatigue strength This correction only works in the tensile region.
How is the mean stress effect used in FatLab?
In Fatlab, this principle is incorporated as a modification to the SN curve instead of a modification on the stress range, i.e. by scaling up the SN curve under compressive mean stresses. Where is the maximum fatigue strength obtainable under fully compressive loading. This option is of course recommended when a code calls for it.
When did the stressed member engine come out?
Stressed member engines were pioneered at least as early as the 1916 Harley-Davidson 8-valve racer, and incorporated in the production Harley-Davidson Model W by 1919. This was called a keystone, or diamond, frame.
What do you mean by stressed member frame?
The stressed-member frame is usually characterized by an engine that appears to “hang,” with no visible means of support beneath the engine. The stressed-member design can be used with more than one style of frame, so you will often hear this incorporated into the description of the chassis. (“It’s a stressed-member, dual-spar design.”)
How is a motorcycle engine held in place?
The motorcycle engine is suspended from a single spine. Spine could be a solid structure. The motorcycle engine is held in a single cradle with a single spine. The motorcycle engine is held in a double cradle with a single spine and single downtube. The motorcycle engine is held in place within a pair of separate cradles.
Why are motorcycle frames the way they are?
Early motorcycle frames served chiefly as a mounting point for all the things that make a stack of tubing different from a motorcycle. As riders learned how much the frame contributed to the ride, handling, and performance of a motorbike, frame technology evolved right alongside other motorcycle components.