Large composite material shapes tool is hot -- structural coupling is out of shape analysis

3, =1 of α of linear expansion coefficient.

7 × 10-6/K. Undertake to tool static force is analysed, can prop up column amount to control bulk of tool face deflection through adjusting. The deflection that falls to compare static force action and heat - the deflection below structural coupling action, use 70 post that prop up. To the graph 1 in tool undertakes static force is analysed (see a picture 2) , tool total deformation is measured for 0~0.

00635mm, perpendicular model extent direction deflection is 0~0.

00627mm; Below static strength effect, the tool structure deflection of 70 column that prop up is tiny, the tool that explains to be the form that prop up in order to prop up column can satisfy the stiffness below static strength effect completely to ask. Shape tool is hot -- structural coupling analysis experiments by experience and craft of knowable tool be out of shape all measure level in millimeter, the dimension of tool reachs ten meters in a few meters, tool structure is out of shape won't movable to the aeriform shedding inside autoclave unripe apparent effect. Because fluid computation is right reseau demand is higher, professional fluid is used to emulate software FLUENT to undertake tool and autoclave in article inside whole shed the reseau of field to differentiate, if pursue,3 are shown. What build to tool is finite yuan of computation that the model can apply to temperature field already, the structure that also can be used at tool is out of shape computation. If the graph is shown 4 times,autoclave craft standard simplifies, what if the watch is shown 1 times,temperature field computation uses relevant data parameter. Nextpage is installed to labour of composite material solidify and character, the is out of shape will immediate impact is contacted with its composite material of tool face is made shape quality, perpendicular model the curvature precision that the warpage of extent direction shapes immediate impact to large size composite material, so model the face is out of shape the token method of field should with model of the face be out of shape direct and relevant. Shape to be opposite of tool model face deflection undertakes token, what if the graph is shown 5 times,use the post that prop up. The graph shows tool 1 times in, its model face existence is numerous and usable the position at token face deflection, explain a problem to go to the lavatory, in order to prop up column coordinate place corresponding model the deflection of side position comes token face is out of shape. Use measure of the column that prop up in view of model place more and the symmetry that considers model structure, choose coordinate of representative the column that prop up: U1V1, U7V1, U14V1, U1V3, U7V3, U14V3, U1V5, U7V5, U14V5, U3V1, U3V3 and U3V5, in all 12 coordinate position. Convection body emulates the tool temperature field that gets in the computation in whole hot course, every other 100s stores file of data of field of a temperature; What will include node temperature to be worth is finite yuan the model guides finite yuan of analytic software ANSYS, use aggravating power load at the same time, the quarter heat when computation gets correspondence - the structural deflection of the tool below structural coupling action. Computation analyses composite material to be 3 hot course in cent of the solidify in autoclave as a result: Warm up, constant drops in temperature blandly, the inhomogenous sex that field of temperature of the tool in this process distributings brings about each part thermal stress to distributing inhomogenous, tool issues generation to be out of shape in thermal stress and action of self-prossessed load coupling. If the graph is shown 6 times,maximum of deflection of the tool in hot course distributings, can reach from inside the graph: (1) in whole hot course, tool total deformation measures maximum to amount to 4.

662mm. (2) maximum of deflection of direction of length of tool edge oneself is 4.

596mm, with total deformation quantity maximum is close to relatively. (3) the deflection maximum of direction of width of tool edge oneself and high direction is respectively 0.

805mm and 0.

339mm, its deflection the photograph is lesser to deflection of tool length direction. Thermal stress is inhomogenous the 53~734 that the deflection maximum that bring about brings about tool deflection for static power load times, this specification shapes in composite material solidify in the process, thermal stress load is out of shape to tool structure having conclusive effect. Graph the between change when 6 report give tool total deformation to measure maximum to follow, cannot reach thermal stress is inhomogenous those who bring about model face warp is right model the influence of the face. The token to tool face warp from direction of edge tool length (graph 5 in U direction) with direction of edge tool width (graph 5 in V direction) these two respects will elaborate: Along the warp of tool length direction, use the U1V1 on V1, U7V1, U14V1, position of the U1V5 on the U1V3 on V3, U7V3, U14V3 and V5, U7V5, U14V5 serves as monitoring point; Along the warp of tool width direction, use the U3V1 on U3, U3V3, U3V5, position of the U14V1 on the U7V1 on U7, U7V3, U7V5 and U14, U14V3, U14V5 serves as monitoring point. By the graph 7 be informed: (1) edge V3 direction, among its the position, with the wind because heat and end and buy of n end position all are made Z warms up in hot course to deflection level increases gradually; After entering constant temperature phase, z of intermediate position office tends basically to deflection smooth, be carried with the wind and because n end is as abhorrent as difference in temperature of environmental hot airy bring about warm up range is distinct, respective Z differs to deflection; Drop in temperature level, its deflection trend is basic with warm up level is contrary. Nextpage (2) edge V1 and V5 direction, carrying positional Z to be to deflection in hot course with the wind is first under hind among prep above the Z of the position and buy of n end position to deflection. (3) carry positional photograph with the wind the Z to the position intermediate to deflection it is first under hind buy of end position of prep above n is opposite the Z at the position intermediate to deflection. Because although connect with ambient air above all,be carried with the wind,this is place, but the column propping up of tool interior sheds classics tool in air faze is formed to spread effect to its when interior, make rate of local air flow is more than tool apparently inside tool exterior, the column propping up of intermediate position and rate of air heat exchange increase. (4) V3 direction, after interior props up the faze of column to shed action to make n carries the position to increase quickly first to deflection relative to the Z at the position intermediate, tend smooth, drop quickly next; V1 and V5 direction, its are in tool periphery and tool exterior flow air is contacted directly, photograph of buy of n end position is to deflection to the Z of the position intermediate in whole hot course change is gentlier. Additional, consider to make clear: (1) direction of edge tool width, warpage is in symmetrical condition basically. (2) go up in U7 direction, buy of two end position is in to deflection relative to the Z of intermediate position warm up level increases quickly, maximum is reached in constant temperature phase and slow drop, enter drop in temperature level hind is reduced quickly. (3) go up in U3 and U14 direction, the Z that the position that monitor is in keeps basically in hot course consistent to deflection curve; Because size of tool width direction is opposite lesser, differ in hot course level, condition of empty air current is right on width direction influence of temperature field poor value is minor. (4) go up in U3 and U14 direction, buy of two end position is in to deflection relative to the Z of intermediate position warm up level increases quickly, after entering constant temperature phase drop quickly; Appear in later period of constant temperature phase slow change, enter drop in temperature level falls quickly again. In the autoclave solidify process of composite material, sustain solidify tool of the form scale to column, inhomogenous sex brings about temperature model face warpage is relatively complex. In tool structure interior, the local deflection of correspondence of place of position of existence of the column that prop up face is more than the position that exists without the column that prop up, because prop up column to shed action to accelerate to airy faze,this is the column that prop up and all round the heat between air is delivered. Graph field of temperature of the 8 tool when be 3200s and Z distributing to structural deflection cloud atlas. Last word the article builds model of tool of solidify of large composite material with the column form that prop up, below the premise that assures stiffness of tool structure static force, computation gets tool changes the temperature field in process to distributing in autoclave solid, next gravitational load, those who bring to bear on to contain temperature to be worth is finite yuan of heat that tool has on the model - structural coupling analysis. Get conclusion is as follows: (1) shape tool is in hot - below structural coupling action, be out of shape to tool structure at load of gravitational load thermal stress relatively a decisive action. (2) be in to tool face perpendicular model the deflection of extent direction, the place that has presence of the column that prop up is more than the position that exists without the column that prop up. CNC Milling