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Fracture Toughness Testing Now Performed at Laboratory Testing, Inc. - LTI now provides Fracture Toughness Testing to ASTM E399 and E1820 to measure the conditions under which a crack in material will lengthen when subjected to loading. Specimens in a range of sizes, including SE(B) and C(T), can be tested to 55,000 lbs
Fracture Toughness Testing Now Performed at Laboratory Testing, Inc.

 

NewswireToday - /newswire/ - Hatfield, PA, United States, 2012/07/26 - LTI now provides Fracture Toughness Testing to ASTM E399 and E1820 to measure the conditions under which a crack in material will lengthen when subjected to loading. Specimens in a range of sizes, including SE(B) and C(T), can be tested to 55,000 lbs.

   
 
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Laboratory Testing Inc. (LTI) has added Fracture Toughness Testing to the list of materials testing services performed by the laboratory to ensure the safety, reliability and integrity of materials. The fracture toughness test is performed on a specimen with a pre-existing crack to determine resistance to further crack extension. Fracture toughness testing measures the conditions under which an existing crack in a material will lengthen when under prescribed loading conditions. LTI performs Fracture toughness tests to ASTM standards E399 and E1820. Fracture toughness is an important material property in design applications since flaws such as cracks, voids, inclusions, weld defects and discontinuities cannot be completely avoided. The fracture toughness test is also valuable in determining whether there is a danger of failure when a flaw is discovered in an existing structure.

The computerized fracture toughness test equipment at Laboratory Testing Inc. can generate 55,000 lbs. of tensile or compressive force. An environmental chamber controls the test temperature between -150° F and +350° F. LTI has fixturing to test various specimens in a range of sizes, including SE(B) (single edge bend) and C(T) (compact tension) specimens. The fracture toughness test requires a precisely
machined specimen prepared to specification. The Machine Shop at LTI prepares all required specimens including those with an EDM notch.

Fracture toughness testing according to ASTM E399 applies a continuously increasing load to the specimen and determines KIC. ASTM E1820 uses a rising load with periodic partial unloading to measure the instantaneous crack length and provides both KIC and JIC. The stress-intensity factor,"K", is used to characterize the fracture toughness of linear elastic materials, which are typically high strength materials that fail in a brittle manner. "J" describes elastic-plastic fracture toughness in more ductile materials which are better able to deform and resist crack growth under load. The Roman numeral subscript “I” indicates the test process in which a tensile load is applied normal to the direction of the crack plane.

About Laboratory Testing Inc.

Laboratory Testing Inc. of Hatfield, PA (labtesting.com) is an independent laboratory in business since 1984. The company specializes in metals and plastics testing, material analysis, nondestructive testing, failure analysis, calibration, dimensional inspection, specimen machining and certified reporting of results. The lab is accredited by PRI/Nadcap and by A2LA to ISO/IEC 17025, which complies with ISO 9001 and ISO 13485. Testing services include mechanical testing, chemical analysis, metallurgical testing, corrosion analysis and nondestructive testing such as ultrasonic testing, magnetic particle inspection, liquid penetrant inspection, X-ray inspection, visual inspection and hydrostatic pressure testing. Chemistry services are available for metals, powdered metals, ores, ferroalloys, composites, ceramics and polymers. The company’s calibration division, LTI Metrology, performs dimensional, pressure, force, torque, electrical, temperature, mass and vacuum calibration services traceable to the National Institute of Standards and Technology (NIST). Field calibration, repairs, new instruments and replacement parts are also provided. Information on LTI services and accreditations is available online.

 
 
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Written by / Agency / Source: Laboratory Testing, Inc. (LTI)

 
 

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Fracture Toughness Testing Now Performed at Laboratory Testing, Inc.

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Publisher Contact: Sharon Bentzley - LabTesting.com 
1-800-219-9095 online[.]labtesting.com
 
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IMPORTANT INFORMATION: Issuance, publication or distribution of this press release in certain jurisdictions could be subject to restrictions. The recipient of this press release is responsible for using this press release and the information herein in accordance with the applicable rules and regulations in the particular jurisdiction. This press release does not constitute an offer or an offering to acquire or subscribe for any Laboratory Testing, Inc. (LTI) securities in any jurisdiction including any other companies listed or named in this release.

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