5,490 research outputs found
Material plastic properties characterization by coupling experimental and numerical analysis of small punch beam tests
No full textA novel small punch beam testing (SPBT) system consisting of a top die, a bottom die and a flat punch with semi-circular cross-section head has been designed and tested. The specimen is a small beam with rectangular cross-section. This SPBT method has the advantage over conventional tensile testing for much less material required for testing and also over the traditional small punch testing because not only less material required but also high accuracy to make the punch head. Through coupling the numerical modelling and experimental results, genetic algorithm has been employed to successfully characterize the material plastic properties
Material plastic properties characterization using a generic algorithm and finite element method modelling of the plane-strain small punch test
No full textIn this paper, a novel plane strain small punch test (SPT) method is proposed for material plastic properties characterization. The plane strain SPT is different from the standard SPT in the two ways: (a) a long thin rectangular specimen (with dimensions of about 20mm×8mm×0.5mm) is used, and (b) the resulting test tool components - such as punch head and upper and lower die - are also different. The punch head is a prism with a half-circular shape and the upper and lower die consists of left and right long blocks, with a chamfer at each of the inner top corners of the lower die. The tool components have been designed and assembled and the plane strain small punch tests have been performed to obtain the punch force and the corresponding central displacements of the specimen. This information is then used to characterize the material's plastic parameters
One-punch laws, mandatory minimums and ‘alcohol-fuelled’ as an aggravating factor: implications for NSW criminal law
No full textAbstract: This article critically examines the New South Wales State Government’s latest policy response to the problem of alcohol-related violence and anxiety about ‘one punch’ killings: the recently enacted Crimes and Other Legislation Amendment (Assault and Intoxication) Act 2014 (NSW). Based on an analysis of both the circumstances out of which it emerged, and the terms in which the new offences of assault causing death and assault causing death while intoxicated have been defined, I argue that the Act represents another example of criminal law ‘reform’ that is devoid of principle, produces a lack of coherence in the criminal law and, in its operation, is unlikely to deliver on the promise of effective crime prevention in relation to alcohol-fuelled violence
Multipoint forming using hole-type rubber punch
No full textReconfigurable multipoint forming is a flexible sheet forming technique aimed at customised sheet metal products. However, one drawback of multipoint forming is the cost and time needed to set up and align the upper and lower pin matrices. This study introduces an optimisation study of a novel hole-type rubber punch replacing the top pin matrix of multipoint incremental forming, aiming to reduce pins setting up and alignment complexity and time. Finite element modelling and design of experiments were used to in-vestigate the effect of hole-type rubber punch configuration such as hole size, hole type, and the compres-sion ratio on the wrinkling, thickness variation, and shape deviation. This research shows that the most significant process parameter in all responses was the hole size. The compression ratio of the material was found to be insignificant in wrinkling and shape deviation. The hole-type rubber punch parameters were found to be a hole size of 9 mm, circular hole type, and a compression ratio of 75%. This experimentally resulted in an improved parts wrinkling of 80%, when compared to using solid rubber punch, with the added benefits of reduction of the cost and time needed to set up and align the pin matrices
An Nasc (Volume 6), Summer 1993
No full textThe Newsletter of the D'Arcy McGee Chair of Irish Studies, Saint Mary's University, Halifax, N.S.Articles to note:Punch, Terrence M. Cornwallis's Irishmen 1749. An Nasc 6 (1993): 6-8. Emigrants to North America from Co. Derry 1834/35. An Nasc 6 (1993): 13-15.Punch, Terrence M. Irish surnames. An Nasc 6, (1993): 17-19.<br
An Nasc (Volume 1, Issue 2), Summer 1988
No full textThe Newsletter of the D'Arcy McGee Chair of Irish Studies, Saint Mary's University, Halifax, N.S.Articles to note: Punch, Terrence M. Irish surnames. An Nasc 1, no. 2 (1988): 2.19th-century passenger list to Newfoundland. An Nasc 1, no. 2 (1988): 7
An Nasc (Volume 2, Issue 1), Spring 1989
No full textThe Newsletter of the D'Arcy McGee Chair of Irish Studies, Saint Mary's University, Halifax, N.S.Articles to note: Punch, Terrence M. Irish surnames. An Nasc 2, no. 1 (1989): 14-15.Waterford-Newfoundland baptisms and marriages in the 18th century. An Nasc 2, no. 2 (1989): 16-18
An Nasc (Volume 2, Issue 2), Fall 1989
No full textThe Newsletter of the D'Arcy McGee Chair of Irish Studies, Saint Mary's University, Halifax, N.S.Articles to note:
Titley, Alan. Disporting oneself on the treetops: Dineen, other deviants and dictionaries. An Nasc 2, no, 2 (1989): 9-12.
Punch, Terrence M. Irish surnames. An Nasc 2, no, 2 (1989): 23-26
Multiple Methods and Research Relations with Young People in Rural Bolivia
No full textFirst paragraph: This chapter is based on ethnographic research carried out in a rural community, Churquiales, in southern Bolivia (Punch 1998). The study focused on children’s negotiation of their autonomy at home, at school, at work and at play (Punch 2000; Punch Forthcoming). During the fieldwork, I lived for two extended periods in the rural community (consisting of regular short visits over two years and a six months intensive period of fieldwork1). I used a range of qualitative methods including informal and semi-structured interviews and semi-participant observation with most members of a sample of eighteen households. Full participant observation with children is impossible for adults mainly because of their physical size (Fine and Sandstrom 1988) and it has been suggested that a semi-participant observer role is more suitable (James et al. 1998). It is this role which I pursued in Bolivia, as it enables the researcher to participate in children's activities to a certain extent whilst recognising that there are limits to such participation. For instance, I could join in their games and ask them to teach me how to play, but I was a 'different' player who was given special attention by the children since adults do not usually play with them
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