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stress relaxation

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780199
EISBN: 978-1-62708-281-5
... Abstract This article describes the general aspects of and practical problems of failure analysis of creep, stress relaxation, and yielding for homogeneous polymers. The effect of temperature and strain rate on the relationship between yield point and elastic modulus and the aging effect...
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Published: 01 March 2006
Fig. 4.5 Cycling at Δε CD causes stress relaxation, but mean stress can be regenerated by a subsequent cycle of Δε AC . More
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Published: 01 July 2009
Fig. 6.5 Comparison of experimental and calculated stress relaxation using power-law equation between stress and secondary creep rate (a) 60 min. (b) 30 min. (c) 1 min. Source: Ref 6.2 More
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Published: 01 March 2006
Fig. 4.6 Cyclic mean stress relaxation of SAE 5160 steel (440 HB) at constant 0.005 mean strain. Source: Ref 4.2 More
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Published: 01 December 1989
Fig. 4.34. Schematic representation of stress relaxation and associated strain rate, strain, and creep ductility ( Ref 39 ). More
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Published: 01 December 1989
Fig. 6.48. Comparison of stress-relaxation behavior after 30,000 h as a function of temperature for various bolt materials subjected to a cold prestrain of 0.15% ( Ref 118 ). More
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Published: 01 March 2006
Fig. 11.51 Relaxation of initially imposed mean stress during strain cycling of annealed SAE 4340 steel (hardness, 29 HRC). Source: Ref 11.58 More
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Published: 31 December 2020
Fig. 8 Effects of the stress-relieving temperature and time at relaxation temperature on the residual stress in a high-strength gray iron containing alloys that assist in retaining strength at elevated temperatures. Courtesy of the American Foundry Society. Source: Ref 10 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870075
EISBN: 978-1-62708-344-7
... Fig. 4.3 Schematic patterns of strain ratcheting under force control for (a) cycling hardening and (b) cyclic softening, and patterns of cyclic stress relaxation under strain control for (c) cyclic hardening and (d) cyclic softening Fig. 4.4 Development of hysteresis loops for man-ten...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540281
EISBN: 978-1-62708-309-6
... Abstract Large-scale yielding at the crack tip and time-dependent crack growth mechanisms, such as stress relaxation due to creep, are nonlinear behaviors requiring nonlinear analysis methods. This chapter presents two such methods, one based on elastic-plastic fracture mechanics, the other...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780055
EISBN: 978-1-62708-281-5
... for predicting plastic part performance (stiffness, strength/impact, creep/stress relaxation, and fatigue) integrated with manufacturing concerns (flow length and cycle time) are demonstrated for design and material selection. plastics material selection materials design plastic parts stiffness impact...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780314
EISBN: 978-1-62708-281-5
... Abstract This article describes the mechanisms of moisture-induced damage in polymeric materials, covering the characteristics of important structural plastics; the effects of moisture on glass transition temperature, modulus, creep, and stress relaxation of plastic materials; and moisture...
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Published: 01 August 2005
Fig. 3.42 Schematic hysteresis loops encountered in isothermal creep-fatigue testing. (a) Pure fatigue, no creep. (b) Tensile stress hold, strain limited. (c) Tensile strain hold, stress relaxation. (d) Slow tensile straining rate. (e) Compressive stress hold, strain limited. (f) Compressive More
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Published: 01 July 2009
Fig. 6.2 Input information for analysis of hold-time test. (a) Strain-time history. (b) Strain-range life curves. (c) Cyclic stress-strain curve. (d) Relationship between steady-state creep rate and stress. (e) Hysteresis loop with various tensile hold times. (f) Stress relaxation curve during More
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Published: 01 March 2006
Fig. 4.3 Schematic patterns of strain ratcheting under force control for (a) cycling hardening and (b) cyclic softening, and patterns of cyclic stress relaxation under strain control for (c) cyclic hardening and (d) cyclic softening More
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Published: 01 July 2009
Fig. 6.4 Analysis of tensile strain hold-time cycle by engineering estimation of hysteresis loop. (a) Tensile strain hold-time hysteresis loop. (b) Calculated stress relaxation during tensile strain hold-time. (c) Elastic and inelastic strain range versus life relationships. Source: Ref 6.2 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080379
EISBN: 978-1-62708-304-1
.... This is often referred to as “stress-relaxation cracking,” “reheat cracking,” or “strain-age cracking” in the literature. Typically, a highly constrained component, such as a heavy wall construction, or a welded component, or a cold-worked structure, can be susceptible to this type of intergranular, brittle...
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Published: 01 December 1989
Fig. 6.49. Relationship between relaxed stress and rupture strength at the same duration for times from 1000 to 30,000 h and temperatures from 475 to 600 °C (885 to 1110 °F) ( Ref 118 ). More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060223
EISBN: 978-1-62708-343-0
... induced biaxiality and interply stresses, creep and cyclic relaxation of residual stresses, and enhanced interfaces for oxidation. References References 9.1 Richards C.W. , Engineering Materials Science , Wadsworth Publishing , San Francisco , 1961 , p 27 , 468 9.2 Halford...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080001
EISBN: 978-1-62708-304-1
... cause the alloy to suffer brittle, intergranular cracking when exposed to the lower end of the intermediate temperatures for certain alloys. This type of cracking is frequently referred to as “reheat cracking,” “stress-relaxation cracking,” or “strain-age cracking” (for nickel-base alloys). Both...