Effect of Curvature on the Impact Damage Characteristics and Residual Strength of Composite Plates
The results of a study of the response and failure characteristics of thin, cylindrically cusrved, composite plates subjected to low-speed impact damage are presented. The results indicate that the plate radius and the plate thickness are important structural parameters that influence the nonlinear response of a plate for a given amount of impact energy. Analytical and experimental contact-force results are compared for several plates and the results correlate well. The impact-energy levels required to cause damage initiation and barely visible impact damage are a function of the plate radius for a given plate thickness. The impact-energy levels required to initiate impact damage for plates with a certain range of radii are greater than plates with other radii. The contact-force results corresponding to these impact-energy levels follow a similar trend. Residual strength results for plates with barely visible impact damage suggest that the compression-after-impact residual strength is also a function of plate radiu. The residual strength of impact-damaged flat plates appears to be lower than the residual strength of the corresponding cylindrically curved plates.
EFFECT OF NANO CLAY ADDITION TO ENERGY ABSORPTION CAPACITY OF STEEL-POLYUREA BI-LAYER
یلک ذ گطاي نا :  عس ًَبً  بیسٍا یلپ  داصآ طَمػ ؾیبهصآ  يطشًا ةزخ  ٌذیکچ  كيمطت يیا سد  سبتفس  دلاَف ِیلاٍد قسٍ –  بیسٍا یلپ ِث عس ًَبً ىدٍضفا شثا ييٌسوّ ٍ يا ِثشض سبث لثبمه سد بیسٍا یلپ  ساشل یػسشث دسَه مبدًا ياشث .تػا ِتفشگ  ٍ یثشدت ؽٍس صا كيمطت يیا ًَِوً .تػا ُذؿ ُدبفتػا يدذػ يصبػ لذه  بّ ِیلاٍد ي  دلاَف  دلاَف ٍ بیسٍا یلپ  شث داصآ طَمػ ِثشض ٍ ُدبػ ؾـو ؾیبهصآ ٍ ِيْت بیسٍا یلپًَبً  .تػا ُذؿ مبدًا بًْآ يٍس  ةبتؿ  تجث تلبض شّ سد دسَخشث  لذه بث ِديتً ٍ شپ صا ُدبفتػا ذّد یه ىبـً ؾیبهصآ حیبتً .تػا ُذؿ ِؼیبمه يدذػ  لىؿ شييغت ؾّبو ٍ يطشًا ةزخ تيلثبل دَجْث سد عس ًَبً ُذٌٌو شثَه سبگذًبه یه  ذؿبث یًصٍ ذكسد بث عس ًَبً . 1 ييها یلپ سد ًَبً تاسرشتْث غیصَت ياشث ٍ ُذؿ طَلخه )ييها یلپ( شت مشً ءضخ لخاد سد % نّ صا  هيًَػاشتلٍا نتؼيػ ٍ یىيًبىه ىص  یه ىبـً ؾـو ؾیبهصآ .تػا ُذؿ ُدبفتػا ًَبً تاسر ىدٍضفا بث ِو ذّد  دٍذض هيتػلاا لٍذه 60  ٍ ؾیاضفا ذكسد  دٍذض ضيً تؼىؿ صا لجل لَع دبیدصا 7  تػا ِتفبی ؾّبو ذكسد .  يٍس شث یًدٍضفا ُدبه شيثبت ُذّبـه ياشث ييٌسوّ ِیلاٍد ِؼغل دشىلوػ ،  ذّبـه .تػا ُذؿ يسازگ ِطك يدذػ يصبػ لذه بث ؾیبهصآ حیبتً ٍ مبدًا ِثشض ؾیبهصآ ًَبً ىدٍضفا ِو تػا ُذؿ ُ دٍذض اس يطشًا ةزخ ساذمه يشويلپ ُدبه ِث عس 3  ُداد ؾیاضفا ذكسد  ٍ  دٍذض ضيً اس ِؼغل سد ِثشض شثا سدسبگذًبه لىؿ شييغت شثواذض 7  ؾیبهصآ ٍ يدذػ لذه حیبتً ِؼیبمه .تػا ُداد ؾّبو ذكسد  لذه ٍد حیبتً يلابث كثبغت ُذٌّد ىبـً یه  ذؿبث .
“Problems with records and recordkeeping practices are not confined to the past”: a challenge from the Royal Commission into Institutional Responses to Child Sexual Abuse
This paper describes and analyses the campaign by the Care Leaver community and other stakeholders to bring about a royal commission into child abuse in Australia. Care Leavers did not get the royal commission they wanted and expected—other more powerful forces were at play—but the Royal Commission into Institutional Responses to Child Sexual Abuse (Royal Commission) was highly effective in exposing the complex nature and extent of the problem of child sexual abuse, “the core transgression of childhood innocence”. This paper aims to show that, although the Royal Commission disappointed many Care Leavers with its narrow focus on sexual abuse, when it eventually reported on records and recordkeeping, the Commission surprised many by moving beyond its narrow remit. Issues relating to records and recordkeeping were not originally a prominent part of the Commission’s mandate, but they emerged as one of the crucial issues that influence the quality of the out-of-home Care experience and child protection. This finding has created a fresh context in which Care Leaver advocates, academics and other professionals can work together to further a new agenda for recordkeeping in out-of-home Care.