Fracture characterization

A metal fracture characterized by considerable plastic deformation, the tearing of metal and an appreciable expenditure of energy, as occurs with repeated bending of a strip of metal. 

Alexander, R.M., Schapery, R.A., Jerina, K.L. and Sander, B.A. (1982). Fracture Characterization of a random fiber composite material. In Short Fiber Reinforced Composite Materials. ASTM STP 722 (B.A. Sanders cd.), ASTM, Philadelphia, PA, pp. 208-224. 

This approach using LEFM is a very useful tool for polymer fracture characterization and may be extended to impact characterization (determination of KId, GId, in dynamic conditions), and for fatigue crack propagation studies (see Sec. 12.4.4). 

In the following sections, a cursory review of dynamic fracture mechanics will be given. Procedures for impact and dynamic fracture characterization of ceramics and ceramic composites will then be described, and the properties peculiar to ceramics and ceramic composites will be discussed. 

K.-H. Yang, A. S. Kobayashi, and A. F. Emery, Dynamic Fracture Characterization of Ceramic Matrix Composites, Journal de Physique, Colloque C3, Supplement au No. 9, C3-223-C3-230 (1988). 

Dreier, R.B., Solomon, D.K., and Beaudoin, C.M., Fracture characterization in the unsaturated zone of a shallow land burial facility, in Flow and Transport Through Unsaturated Rock, Evans, D.D. and Nicholson, T.J., Eds., Geophys. Monogr., 42, 51, 1987. 

Laubach S. E. and Milliken K. L. (1996a) New fracture characterization methods for sihciclastic rocks. In Rock Mechanics Tools and Techniques, Proceedings of the 2nd North American Rock Mechanics Symposium (eds. M. Aubertin and others). Balkema, Rotterdam, 2050pp. 

Sheppard, A., Kelly, D., Tong, L., (1998), Int. J. of Adhesion and Adhesives 18, 385. Wemersson, H., (1994), Fracture characterization of wood adhesive joints. Report TVSM-1006, Lund University, Division of Structural Mechanics, Lund, Sweden, Simon, F., Morel, S., Valentin, G. (1997). In Proceedings of the Euromech Colloquium 358, Mechanical behaviour of adhesive joints, analysis, testing and design, Pluralis, Paris, pp. 341-351. 

Because the existence and extent of the nonlinear regime, b, is highly dependent on the fraction of the modifying phase and the test speed, it is believed to play an important role in thet kinetics of toughening and thus is considered for fracture characterization. In order to apply the same analysis over the entire range of test speeds, the standard linear elastic fracture mechanics... 

Fluang [246] investigated the SCC of AISI 321 stainless steel in acidic chloride solutions by the SSRT technique and fracture mechanics. It was found that the cleavage fracture characterizes the fracture surface. The active dissolution mechanism controls the SCC of AISI 321 stainless steel in acidic chloride solutions and can be inhibited by using KI. The inhibition effect of KI on the SCC is due to inhibition of the anodic reaction of the corrosion process. 

Yao Yao, X. F., Zhou, D., Yeh, H. Y. Macro/microscopic fracture characterizations of Si02/epoxy nanocomposites. Aerospace Science and Technology 12 (2008) 223-230. 

Multislice CT is extremely sensitive in the detection of fractures, and source images together with rendered reconstructions can display the spatial relationship of fracture fragments in complex anatomic regions. Complementary CT examination of intra-articular fractures of the distal tibia caused in 64% of subjects a change in the surgical treatment, and in 82% additional information concerning the fracture characterization and classification (Burkhardt et al. 2003). 

Fasce L, Seltzer R, Frontini P, Rodriguez Pita V J, Pacheco EBAY and Dias M L (2005) Mechanical and fracture characterization of 50 50 HDPE/PET blends presenting different phase morphologies, Polym Eng Sci 45 354-363. 

If force is imposed, rather than displacement, what is the value of P = P necessary for incipient fracture For this case, the potential energy is the sum of the elastic energy (4.12) in both arms plus the total external potential energy —26P = —Sa P " /Eh . It follows that the state of incipient fracture, characterized by f/(a) = F, is defined by the condition... 

Schapery R (1987) Deformation and fracture characterization of inelastic composite materials using potentials. Polymer Eng Sci 27 63-76... 

Li X, Carlsson LA (1999) The Tilted Sandwich Debond (TSD) specimen for face/core interface fracture characterization. J Sandwich Struct Mater l(l) 60-75... 

Prabhat, K Donovan, J.A. (1985). Tearing instability in polypropylene. Polymer, Vol.26, No.l3, (December 1985), pp. 1963-1970, ISSN 0032-3861 Rodriguez, C. Maspoch, MLl. Belzunce F.J. (2009). Fracture characterization of ductile polymers through methods based on load separation. Polymer Testing, Vol.28, No.2, (April 2009), pp. 204-208, ISSN 0142-9418... 

Fracture characterized by tearing of metal accompanied by appreciable gross plastic deformation and expenditure of considerable energy. Contrast with brittle fraeture. 

Fernlund G, Spelt JK (1994) Mixed-mode fracture characterization of adhesive joints. Compos Sci Technol 50 441-449... 

Fractures are mechanical breaks in rocks they originate from strains that arise from stress concentrations around flaws, heterogeneities, and physical discontinuities. .. They occur at a variety of scales, from microscopic to continental (Committee on Fracture Characterization and Fluid How, U.S. National Committee for Rock Mechanics, 1996). The Committee noted that ""fracture is a term used for all types of generic discontinuities . Fracture types can be classified into two groups related to their mode of formation ... 

Committee on Fracture Characterization and Eluid Plow, 1996, U.S. National Committee for Rock Mechanics. Washington, DC... 

---