Torque strength tests

D 3658 Test Method for Determining the Torque Strength of Ultraviolet (UV) light... 

In the United Kingdom the Ministry of Defence (MOD) has issued specifications DTD 5628-5633, which cover test procedures and performance requirements for a range of products. Five strength bands and four viscosities, from penetrating to thixotropic, are defined. The torque strengths are tested on M8 nuts and bolts and the shear strength in 12-mm pins and collars. The development of these specifications and the test procedures have been described by C. L. Brett at the MOD. The breakloose torque on nuts and bolts requires particular attention to a transient measurement where the first torsional motion is detected. Other products show somewhat different behavior, with no distinct breakloose, and the torque at which the sealant begins to yield is not easily detected [77]. British Standard BS 5292 relates to the use of anaerobic sealants on gas appliances. 

The International Organization for Standardization (ISO) has finalized an International Standard (ISO/DIS 10964 1993) Adhesives Anaerobic Adhesives— Determination of Torque Strength of Anaerobic Adhesives on Threaded Fasteners. This standard describes testing procedures for liquid and preapplied sealants using manual and graphical procedures. 

Modified rail test See Torque strength Disk shear in compression Bond strength in compressive shear... 

In Britain the Ministry of Defence specification DTD 5628-5633 covers test procedures and performance requirements for a range of products. Five strength bands and four viscosities fi om penetrating to thixotropic are defined. The torque strengths, including breakloose torque, are tested on M8 nuts and bolts and the shear strength in 12 mm pins and collars [201]. 

ISO 10964 (August 15, 1993) Adhesives—Anaerobic adhesives— Determination of torque strength of anaerobic adhesives on threaded fasteners describes testing procedures for liquid and preapplied sealants. 

D3658-01 Standard test method for determining the torque strength of ultraviolet (UV) light-cured glass/metal adhesive joints... 

D5649-01 Standard test method for torque strength of adhesives used on threaded fasteners... 

Strength is measured in the laboratory with tests of stretch, compression, and torque in both uncured and cured compounds. 

Relevant physical properties, e.g., leak test, tensile strength, moisture vapour transmission, closure removal torque... 

Deciding whether to measure force (a translational quantity) or torque (a rotational quantity) is an important issue in testing strength. Even when the functional units of interest produce rotational motion, force measurement at some point along the moment arm is common. This is due to the evolution from manual muscle tests to the use of objective measurements where a force sensor replaces the human examiner sense of force resisted or generated. If d is the distance from the point of rotation to the point of force measurement and the force vector is tangent to the arc of motion, then... 

Endurance is how long an activity can be performed at the required load and rate level. Thus, the basic unit of measure is time. Time is the only measure of how long it takes to complete a task. If the focus is on a given variable (e.g., strength, speed, or endurance), it is necessary to either control or measure the others. When the focus is endurance, the other factors of force or torque, speed, and joint angle, can be described as conditions under which endurance is measured. Because of the interactions of endurance and load or endurance and time (as e.g.), a number of endurance-rdatedmeasures have evolved. These endurance-related measures have clouded endurance testing. 

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